CN103531311A - Electrified railway-used bar-shaped column type porcelain polymer composite insulator and preparation method thereof - Google Patents
Electrified railway-used bar-shaped column type porcelain polymer composite insulator and preparation method thereof Download PDFInfo
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- CN103531311A CN103531311A CN201310006537.4A CN201310006537A CN103531311A CN 103531311 A CN103531311 A CN 103531311A CN 201310006537 A CN201310006537 A CN 201310006537A CN 103531311 A CN103531311 A CN 103531311A
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Abstract
The invention discloses an electrified railway-used bar-shaped column type porcelain polymer composite insulator. The composite insulator comprises a porcelain core bar with more than one porcelain umbrella skirt. Two ends of the porcelain core bar are adhered with metal fittings via an adhering agent. The external surface of the porcelain core bar is covered with a polymer sheath with more than one polymer umbrella skirt. The surface of the porcelain core bar is processed via a coupling agent. The sheath and the umbrella skirt are solidified via high temperature and formed in one step on the porcelain core bar via an overall injection or pouring process. The umbrella skirt on the sheath comprises more than one large umbrella-shaped protrusion which is coaxially arranged with the porcelain core bar. The umbrella of the large umbrella-shaped protrusion is from 30mm to 60mm after the umbrella stretches out. The electrified railway-used bar-shaped column type porcelain polymer composite insulator which is pollution-flashover-resistant, bird-pecking-resistant and wind-and-sand-resistant is high in pollution flashover voltage so that crack and break in the process of using can be prevented. Meanwhile, the electrified railway-used bar-shaped column type porcelain polymer composite insulator has characteristics of being bird-trouble-resistant, wind-and-sand-resistant, external-force-damage-resistant and assistant in climbing and stepping.
Description
Technical field
The present invention relates to a kind of composite insulator, relate in particular to clavate pillar porcelain polymer composite insulator and preparation method thereof for a kind of electric railway.
Background technology
Composite insulator is compared porcelain insulator because of it and is had an enormous advantage and be subject to the favor of industry at aspects such as weight, resistance to pollution flashover voltages, especially high this feature of pollution flashover voltage.Research is found, has certain relation between the umbrella skirt construction of composite insulator and pollution flashover voltage, makes other conditions its pollution flashover voltage of composite insulator identical but that umbrella skirt construction is different different.
Umbrella footpath is as follows on the impact of composite insulator Flashover Characteristics: umbrella footpath is strengthened, the equivalent diameter of composite insulator increases, Flashover Characteristics is had to negative influence, although the corresponding increase of the creepage distance of composite insulator, can improve pollution flashover voltage to a certain extent, but the degree improving is limited, causes on the contrary the utilance of creepage distance relatively to reduce, and excessive umbrella footpath can consume too much material, does not have economic benefit; Therefore the too small deficiency that can cause leakage distance in umbrella footpath, selects the First Principles in umbrella footpath to be, is guaranteeing that whole insulator meets the umbrella footpath of selecting to have economic benefit under the prerequisite of leakage distance.
Umbrella spacing is as follows on the impact of composite insulator Flashover Characteristics: umbrella spacing increases, and first can improve the contamination accumulation characteristics of composite insulator; Secondly, can effectively suppress bridge joint between umbrella, prevent the serial connection of serious icing snowberg and retardance electric arc; The 3rd, can promote the utilance of creepage distance; But the prerequisite increasing is to guarantee that whole composite insulator has sufficient creepage distance.Umbrella spacing reduces, and can improve the creepage distance of composite insulator in the situation that insulation height is certain, but the pollution flashover voltage linear growth with the increase of creepage distance not, umbrella spacing is too small, and bridge joint easily occurs between umbrella, and the utilance of creepage distance reduces relatively.
Existing composite insulator, the basic glass fiber reinforcement epoxy rod that all adopts of inner porcelain core rod, because of its weatherability poor, can not be exposed in atmospheric environment and move, according to incompletely statistics simultaneously, the insulator Fragile Split that domestic electric power system occurs has reached a lot of, and brittle failure often occurs in the concentrated high-pressure side of composite insulator field intensity, and the composite insulator that Fragile Split occurs generally all exists the situation of sheath, end part seal breakage.It is generally acknowledged: the probability that brittle failure occurs is very little, cannot prevent, cannot detect, very harmful to contact line.
Electrification railway contact net is wide by composite insulator operation geographic range, different regions have its geographical particularity, thereby cause operating condition complicated, there is extraneous uncertain factor, thereby affect the safe operation of composite insulator in composite insulator simultaneously in transportation, I&M process.
Summary of the invention
The first technical problem to be solved by this invention is: select a kind of porcelain core rod of material as electric railway, to use the interior insulation porcelain plug of clavate pillar porcelain polymer composite insulator, when meeting mechanical load requirement, porcelain core rod can have excellent weatherability, can Fragile Split can not occur in safe operation under atmospheric conditions.
The second technical problem to be solved by this invention is: selected a kind of insulation composition, there is excellent weatherability, good hydrophobicity, migration of hydrophobicity, high mechanical properties, good wear resistance and external force resistance damage capability, and can meet the processing request of clavate pillar porcelain polymer composite insulator polymer jacket and polymer full skirt for electric railway.
The 3rd technical problem to be solved by this invention is: a kind of preparation method is provided, has prepared clavate pillar porcelain polymer composite insulator for electric railway, thereby meet different designs and user demand with the method.
For addressing the above problem, the first technical scheme provided by the invention is: select porcelain core rod as electric railway, to use the inner insulator porcelain core rod of clavate pillar porcelain polymer composite insulator, because porcelain core rod is when meeting mechanical performance requirement, can in exposing atmospheric environment, can there is not brittle failure safely.
The second technical scheme provided by the invention is: choose outdoor type hydrophobicity cycloaliphatic epoxy resin and prepare clavate pillar porcelain polymer composite insulator for electric railway as raw material.
Outdoor type hydrophobicity cycloaliphatic epoxy resin material has good hydrophobicity, migration of hydrophobicity and electric property, there is higher mechanical strength simultaneously, thereby electric railway of the present invention has good hydrophobicity with clavate pillar porcelain polymer composite insulator series of products, in the time of migration of hydrophobicity and electric property, improved the anti-blown sand ability of these series of products, the ability that external force resistance destroys, can prevent the destruction of unfirmly closing to product, and had within the specific limits can assist to climb and stepped on performance, facilitate engineering staff's construction, improved the coefficient of safety in work progress.
The present invention's the 3rd technical scheme is: a kind of electric railway by the concrete technical scheme of clavate pillar porcelain polymer composite insulator is:
Clavate pillar porcelain polymer composite insulator for a kind of electric railway, comprise with porcelain core rod, the porcelain core rod two ends of an above porcelain full skirt, by adhesive glue, gold utensil is housed, porcelain core rod outer surface is coated with the polymer jacket with an above polymer full skirt, sheath and full skirt are by general injection or pouring technology hot setting one-shot forming on porcelain core rod, full skirt on sheath comprises the above large umbrella shape projection with coaxial of arranging of porcelain core rod, and the umbrella of large umbrella shape projection stretches out for 30mm～60mm.
Further, between adjacent large umbrella shape projection, be disposed with a umbellule shape projection, a middle umbrella shape projection, a umbellule shape projection.
Further, be provided with an above umbellule shape projection between adjacent large umbrella shape projection, umbellule shape projection coaxially arranges with porcelain core rod.
Further, between adjacent large umbrella shape projection, be provided with two umbellule shape projections.
Further, between adjacent large umbrella shape projection, be provided with a umbellule shape projection.
Further, the difference that the umbrella of large umbrella shape projection and middle umbrella shape projection stretches out is greater than 15mm.
Further, the difference that the umbrella of middle umbrella shape projection and umbellule shape projection stretches out is greater than 15mm.
Further, the difference that the umbrella of large umbrella shape projection and umbellule shape projection stretches out is greater than 15mm.
Further, it is the full skirt outer of composite insulator and the radial distance between sheath that the umbrella of umbrella shape projection stretches out, and the umbrella spacing of large umbrella shape projection is greater than 0.8 with the ratio that umbrella stretches out.
Further, the top rade of the full skirt on sheath is 6 °～16 °, and angle of declination is 0 °.
The 4th technical scheme provided by the invention is: the preparation method of clavate pillar porcelain polymer composite insulator for a kind of electric railway, and the method comprises:
(1) porcelain core rod is inserted in the centre bore of gold utensil, then by adhesive mucilage binding, is integrated, obtain porcelain core rod-gold utensil complex; Described adhesive is the wherein a kind of of the adhesive such as cement or resin;
(2) in step (1), the porcelain core rod of porcelain core rod-gold utensil complex surface adopts coupling agent to carry out preliminary treatment; Described coupling agent is the wherein a kind of of the coupling agents such as Kaimoluoke series 607 or 608;
(3) step (2) gained preliminary treatment porcelain core rod-gold utensil complex is put into the relevant position in mould;
(4) by outdoor type hydrophobicity cycloaliphatic epoxy resin compound injection or be poured in mould, and solidify for the first time, curing temperature is 130-170 ℃; Described injection or pouring technology are automatic pressure injection molding technique, and feed pressure is 0.1-0.4MPa, and feed time is 3-5min;
(5) then the demoulding solidifies for the second time, and curing temperature is 110-150 ℃, obtains clavate pillar porcelain polymer composite insulator for electric railway.
Compared to existing technology, a kind of electric railway of the present invention is as follows with the beneficial effect of clavate pillar porcelain polymer composite insulator:
(1) by the umbrella of umbrella shape projection is stretched out, the reasonable setting of the ratio that stretches out of the umbrella of the umbellate form projection difference of stretching out and umbrella spacing and umbrella, and the simulation analysis of contamination accumulation characteristics, reaches the effect of composite insulator Flashover Characteristics the best;
(2) porcelain core rod of clavate pillar porcelain polymer composite insulator adopts the porcelain core rod with porcelain full skirt, and porcelain core rod weather resistance is strong, can not corrode because of the external world, and brittle failure occurs, thereby make composite insulator of the present invention in use can prevent Fragile Split;
(3) the polymer umbrella cover of clavate pillar porcelain polymer composite insulator adopts HCEP(Hydrophobic Cycloaliphatic Epoxy: hydrophobicity alicyclic epoxide compound) material, HCEP material has good hydrophobicity, migration of hydrophobicity and electric property, there is higher mechanical strength simultaneously, thereby clavate pillar porcelain polymer composite insulator series of products of the present invention have good hydrophobicity, in the time of migration of hydrophobicity and electric property, improved the anti-blown sand ability of composite insulator, the ability that external force resistance destroys, can prevent the destruction of unfirmly closing to composite insulator umbrella cover.In engineering staff's work progress, can trample on full skirt within the specific limits if desired simultaneously, thereby facilitate construction, improve the coefficient of safety in engineering staff's work progress.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of clavate pillar porcelain polymer composite insulator for electric railway of the present invention;
Fig. 2 is the structural representation of the second embodiment of clavate pillar porcelain polymer composite insulator for electric railway of the present invention;
Fig. 3 is the structural representation of the 3rd embodiment of clavate pillar porcelain polymer composite insulator for electric railway of the present invention;
Fig. 4 is the structural representation of the 4th embodiment of clavate pillar porcelain polymer composite insulator for electric railway of the present invention;
Embodiment
For fully understanding the present invention's object, feature and effect, by following concrete execution mode, the present invention is elaborated.
The invention discloses clavate pillar porcelain polymer composite insulator and preparation method thereof for a kind of electric railway.This porcelain polymer composite insulator porcelain core rod adopts the porcelain core rod with porcelain full skirt, and porcelain core rod weather resistance is strong, can not corrode because of the external world, and brittle failure occurs, thereby make composite insulator of the present invention in use can prevent Fragile Split; This porcelain polymer composite insulator is prepared by outdoor type hydrophobicity cycloaliphatic epoxy resin, machinery and electric property due to hydrophobicity cycloaliphatic epoxy resin excellence, thereby make porcelain polymer composite insulator series of products of the present invention when thering is good hydrophobicity, migration of hydrophobicity and electric property, improve the ability of the anti-blown sand ability of these series of products, external force resistance destruction, can prevent the destruction of unfirmly closing to polymer dish type insulating part, and have within the specific limits can assist to climb and step on performance.
Polymer dish type insulating part adopts general injection or pouring technology, and by processing conditions one-step solidification moulding in mould of long-time high-temperature, high pressure, series is processed into different beveled structures, to meet different designs and user demand.Below in conjunction with accompanying drawing, describe the concrete structure of clavate pillar porcelain polymer composite insulator for several electric railways in detail.
As shown in Figure 1, electric railway of the present invention comprises that with clavate pillar porcelain polymer composite insulator porcelain core rod 1, porcelain core rod 1 two ends with an above porcelain full skirt 2 have gold utensil 3(gold utensil overall dimension structure need to convert according to installing and using by adhesive 4 mucilage bindings), porcelain core rod 1 outer surface is coated with the polymer jacket 5 with an above polymer full skirt 6, and polymer jacket 5 passes through general injection or pouring technology hot setting one-shot forming on porcelain core rod 1 with full skirt 6.
Wherein, the top rade of the full skirt 6 on described polymer jacket 5 is 6 °～16 °, and angle of declination is 0 °.Further, referring to Fig. 1, full skirt 6 on polymer jacket 5 in the present invention comprises the equal diameters each other with the above large umbrella shape projection 61(of coaxial of arranging of porcelain core rod 1), the umbrella of large umbrella shape projection 61 stretches out (umbrella stretches out the radial distance referring between composite insulator umbrella skirt outer and sheath) for 30mm～60mm, and the umbrella spacing of the large umbrella shape projection 61 in the present invention should be greater than 0.8 with the ratio that umbrella stretches out.
In addition, referring to Fig. 1, in the present invention, between adjacent large umbrella shape projection 61, be also provided with one with upper umbrella shape projection 62, umbellule shape projection 63, in the present embodiment, be arranged on and between two adjacent large umbrella shape projections 61, be disposed with the middle umbrella shape projection of a umbellule shape projection 63,62, a umbellule shape projection 63, wherein, the difference that the umbrella of umbrella shape projection big or middle stretches out should be greater than 15mm, in, the umbrella of the umbellule shape projection difference of stretching out should be greater than 15mm.
Umbrella cover in the present invention preferably adopts HCEP(Hydrophobic Cycloaliphatic Epoxy: hydrophobicity alicyclic epoxide compound) material, thereby make clavate pillar porcelain polymer composite insulator of the present invention when thering is good hydrophobicity, migration of hydrophobicity and electric property, the anti-blown sand ability of composite insulator, the ability that external force resistance destroys have been improved, can prevent the destruction of unfirmly closing to composite insulator umbrella cover, and make within the specific limits composite insulator have can to assist to climb to step on performance, improved the coefficient of safety in work progress.
As shown in Figure 2, electric railway of the present invention comprises that with clavate pillar porcelain polymer composite insulator porcelain core rod 1, porcelain core rod 1 two ends with an above porcelain full skirt 2 have gold utensil 3(gold utensil overall dimension structure need to convert according to installing and using by adhesive 4 mucilage bindings), porcelain core rod 1 outer surface is coated with the polymer jacket 5 with an above polymer full skirt 6, and polymer jacket 5 passes through general injection or pouring technology hot setting one-shot forming on porcelain core rod 1 with full skirt 6.
Wherein, the top rade of the full skirt 6 on described polymer jacket 5 is 6 °～16 °, and angle of declination is 0 °.Further, referring to Fig. 2, full skirt 6 on polymer jacket 5 in the present invention comprises the equal diameters each other with the coaxial a plurality of large umbrella shape projection 61(arranging of porcelain core rod 1), the umbrella of large umbrella shape projection 61 stretches out (umbrella stretches out the radial distance referring between composite insulator umbrella skirt outer and sheath) for 30mm～60mm, and the umbrella spacing of the large umbrella shape projection 61 in the present invention should be greater than 0.8 with the ratio that umbrella stretches out.
In addition, referring to Fig. 2, in the present invention, between adjacent large umbrella shape projection 61, be also provided with more than one umbellule shape projection 63(equal diameters each other), the umbellule shape projection 63 being arranged in the present embodiment between two adjacent large umbrella shape projections 61 is two, wherein, the difference that the umbrella of large and small umbrella shape projection stretches out should be greater than 15mm.
The 3rd embodiment of clavate pillar porcelain polymer composite insulator for electric railway of the present invention has been shown in Fig. 3.Wherein, composite rod insulator also comprises that porcelain core rod 1, porcelain core rod 1 two ends with an above porcelain full skirt 2 have gold utensil 3(gold utensil overall dimension structure need to convert according to installing and using by adhesive 4 mucilage bindings in this embodiment), porcelain core rod 1 outer surface is coated with the polymer jacket 5 with an above polymer full skirt 6, and polymer jacket 5 passes through general injection or pouring technology hot setting one-shot forming on porcelain core rod 1 with full skirt 6.
Wherein, the top rade of the full skirt 6 on described polymer jacket 5 is 6 °～16 °, and angle of declination is 0 °.Further, full skirt 6 on polymer jacket 5 in the present invention comprises the equal diameters each other with the above large umbrella shape projection 61(of coaxial of arranging of porcelain core rod 1), the umbrella of large umbrella shape projection 61 stretches out (umbrella stretches out the radial distance referring between composite insulator umbrella skirt outer and sheath) for 30mm～60mm, and the umbrella spacing of the large umbrella shape projection 61 in the present invention should be greater than 0.8 with the ratio that umbrella stretches out.It should be noted, the umbellule shape projection 63 being arranged in the present embodiment between two adjacent large umbrella shape projections 61 is one, and wherein, the difference that the umbrella of large and small umbrella shape projection stretches out should be greater than 15mm.
The 4th embodiment of clavate pillar porcelain polymer composite insulator for electric railway of the present invention has been shown in Fig. 4.Wherein, composite rod insulator also comprises that porcelain core rod 1, porcelain core rod 1 two ends with an above porcelain full skirt 2 have gold utensil 3(gold utensil overall dimension structure need to convert according to installing and using by adhesive 4 mucilage bindings in this embodiment), porcelain core rod 1 outer surface is coated with the polymer jacket 5 with an above polymer full skirt 6, and polymer jacket 5 passes through general injection or pouring technology hot setting one-shot forming on porcelain core rod 1 with full skirt 6.
Wherein, the top rade of the full skirt 6 on described polymer jacket 5 is 6 °～16 °, and angle of declination is 0 °.Further, full skirt 6 on polymer jacket 5 in the present invention comprises the equal diameters each other with the above large umbrella shape projection 61(of coaxial of arranging of porcelain core rod 1), the umbrella of large umbrella shape projection 61 stretches out (umbrella stretches out the radial distance referring between composite insulator umbrella skirt outer and sheath) for 30mm～60mm, and the umbrella spacing of the large umbrella shape projection 61 in the present invention should be greater than 0.8 with the ratio that umbrella stretches out.It should be noted, in the present embodiment, between two adjacent large umbrella shape projections 61, umbellule shape projection 63 is not set.
Electric railway of the present invention is prepared by hydrophobicity cycloaliphatic epoxy resin with clavate pillar porcelain polymer composite insulator umbrella cover, there is the ability that very high mechanical strength, good wear resistance and external force resistance destroy, anti-blown sand ability that can these series of products is, the ability that external force resistance destroys, can prevent that unfirmly closing from destroying product, workmen can assist to climb within the specific limits and step on simultaneously.Compare with insulator prepared by other several insulating material, advantage of the present invention is obvious.Shown in the concrete contrast table 1 of several insulating material.
Table 1
| Item compared | Pottery | Ethylene-propylene rubber | Silicon rubber | Cycloaliphatic epoxy resin | Hydrophobicity cycloaliphatic epoxy resin |
| Design flexibility | ○○ | ○ | ○ | ●● | ●● |
| Weight | ○○ | ● | ● | ● | ● |
| Manufacturing process's (complexity) | ○○○ | ○○ | ○○ | ●● | ●● |
| Operation | ○○ | ● | ● | ● | ● |
| Good hydrophobicity | ○○○ | ● | ●●● | ● | ●● |
| Hydrophobicity migration | ○○○ | ○○ | ●●● | ○○ | ●● |
| Hydrophobicity recovery | ○○○ | ○○ | ●●● | ○○ | ●● |
| Opposing malicious sabotage ability | ○○ | ● | ● | ● | ● |
| Opposing is by bird damage capability | ●● | ○○ | ○○ | ● | ● |
| Resistance to the supporting property of flashover | ●● | ● | ● | ● | ● |
| Resistance to electric trace and corrosion resistance | ●●● | ●● | ●● | ●● | ●●● |
| Insulator cost | ● | ○○ | ○○○ | ● | ● |
● ● ● excellence ● ● good ● 000 differ from 00 poor zero general
Describe the preparation method of clavate pillar porcelain polymer composite insulator for electric railway of the present invention below in detail.
By a clavate pillar porcelain polymer composite insulator preparation method, the method comprises the steps:
(1) select corresponding construction mould, be installed on production to be processed on process equipment.
(2) porcelain core rod is inserted in the centre bore of gold utensil, then by adhesive mucilage binding, is integrated, obtain porcelain core rod-gold utensil complex; Adhesive can be the adhesive such as cement or resin.
(3) in step (2), the porcelain porcelain core rod of porcelain core rod-gold utensil complex surface adopts coupling agent to carry out preliminary treatment; Coupling agent can be the coupling agents such as Kaimoluoke series 607 or 608;
(4) step (3) gained preliminary treatment porcelain core rod-gold utensil complex is put into the relevant position in mould;
(5) hydrophobicity cycloaliphatic epoxy resin is injected in mould, and solidifies for the first time, gel time is 8-40min, and molding time is 12-50min, and curing temperature is 130-170 ℃.This step preferably adopts automatic pressure injection molding technique.Preferred charging bore is 16mm, and feed time is 3-5min, and feed pressure is about 0.1-0.4MPa.Adopt automatic pressure injection molding technique, product has very high insulation property and mechanical strength, traditional vacuum can be poured into a mould to required time and shorten to tens minutes, and have the outstanding advantages such as good control exothermic effect.
(6) then the demoulding solidifies for the second time, and be 8-10 hour curing time, and curing temperature is 110-150 ℃.Solidifying for the second time can be in the conventional equipment such as electrocaloric effect.
Polymer dish type insulating part solidification process of the present invention divides for the first time and to solidify and to solidify for two stages for the second time, in cure stage for the first time, should adopt low temperature gel process, can reduce the internal stress that solidification process volume contraction produces like this.Slower owing to solidifying for the first time, the material of contraction can supplement in time, and bubble can be discharged in time, can reduce the formation of inner void.Injection under different temperatures or castable gelation time and curing time are as shown in table 2.
Table 2
| Temperature | Gelation time | Molding time |
| 130℃ | 30～40min | 40～50 min |
| 140℃ | 15～20 min | 25～30 min |
| 150℃ | 12～15 min | 15～20 min |
| 160℃ | 8～10 min | 12～15 min |
| 170℃ | 6～8 min | 10 min |
The reasonable setting of the ratio that electric railway of the present invention is stretched out umbrella stretches out, large umbellule umbrella stretches out difference and umbrella spacing and umbrella with clavate pillar porcelain polymer composite insulator, reaches the effect of composite high voltage insulator Flashover Characteristics the best.
The present invention, by using hydrophobicity cycloaliphatic epoxy resin, has improved the anti-blown sand ability of clavate pillar porcelain polymer composite insulator, the ability that external force resistance destroys for electric railway, can prevent the destruction of unfirmly closing to product.In engineering staff's work progress, can trample on full skirt within the specific limits if desired simultaneously, thereby facilitate construction, improve the coefficient of safety in engineering staff's work progress.
Below by specific embodiment, set forth the enforcement of method of the present invention.That concrete grammar comprises for preparation polymer insulation part as shown in Figure 3 below:
(1) select corresponding construction mould, be installed on production to be processed on process equipment.This mould is according to the corresponding manufacture of following structural requirement: the top rade of full skirt is 6 °～16 °, and angle of declination is 0 °; A umbellule shape projection is set between the large umbrella shape projection of every two equal diameters; The difference that the umbrella of large umbrella shape projection and umbellule shape projection stretches out is 18mm; Wherein the umbrella of umbrella shape projection stretches out for 55mm.
(2) porcelain core rod is inserted in the centre bore of gold utensil, then by adhesive mucilage binding, is integrated, obtain porcelain core rod-gold utensil complex; The porcelain core rod surface of porcelain core rod-gold utensil complex adopts the commercially available coupling agent Kaimoluoke 608 through absolute ethyl alcohol dilution to carry out preliminary treatment; Preliminary treatment porcelain core rod-gold utensil complex is put into the relevant position in mould;
(3) adopt automatic pressure injection molding technique to be expelled in e mould outdoor type hydrophobicity cycloaliphatic epoxy resin, charging bore is 16mm, and feed time is 5min, and feed pressure is about 0.4MPa.In mould, solidify for the first time, curing temperature is 130 ℃, and gel time is 35min, and molding time is 45min.
(4) then the demoulding is put in electrocaloric effect and is solidified for the second time, and be 10 hours curing time, and curing temperature is 110 ℃, obtains clavate pillar porcelain polymer composite insulator for electric railway as shown in Figure 3.
In sum, resistant sudden strain of a muscle of the present invention, anti-unfirmly closing, anti-blown sand, can obtain the effect of Flashover Characteristics the best.The polymer umbrella cover of clavate pillar porcelain polymer composite insulator has good hydrophobicity, migration of hydrophobicity and electric property with HCEP material, has higher mechanical strength simultaneously.The present invention is when having good hydrophobicity, migration of hydrophobicity and electric property, the ability also with anti-blown sand ability, external force resistance destruction, can prevent the destruction of unfirmly closing to composite insulator umbrella cover, and have within the specific limits can assist to climb and step on performance, facilitate engineering staff's construction, improved the coefficient of safety in work progress.Electric railway of the present invention adopts the porcelain porcelain core rod with porcelain full skirt with the porcelain core rod of clavate pillar porcelain polymer composite insulator, porcelain porcelain core rod mechanical strength is high, weather resistance is strong, can not corrode because of the external world, and generation brittle failure, thereby make composite insulator of the present invention in use can prevent Fragile Split.Thereby meet the user demand of electric railway and Highspeed Catenary.
By specific embodiment, the present invention is further described above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art, reading the various modifications of after this specification, above-described embodiment being made, belongs to the scope that the present invention protects.
Claims (10)
1. clavate pillar porcelain polymer composite insulator for an electric railway, it is characterized in that, comprise the porcelain core rod (1) with an above little porcelain full skirt (2), there is gold utensil (3) at porcelain core rod (1) two ends by adhesive (4) mucilage binding, porcelain core rod (1) outer surface is coated with the polymer jacket (5) with an above polymer full skirt (6), polymer jacket (5) and full skirt (6) hot setting one-shot forming on porcelain core rod (1) by general injection or pouring technology, full skirt (6) on polymer jacket (5) comprises and the coaxial above large umbrella shape projection of of arranging of porcelain core rod (1) (61), the umbrella of large umbrella shape projection (61) stretches out for 30mm～60mm.
2. clavate pillar porcelain polymer composite insulator for electric railway according to claim 1, it is characterized in that, between adjacent large umbrella shape projection (61), be disposed with a umbellule shape projection (63), a middle umbrella shape projection (62), a umbellule shape projection (63), and coaxially arrange with porcelain core rod (1).
3. clavate pillar porcelain polymer composite insulator for electric railway according to claim 1, it is characterized in that, between adjacent large umbrella shape projection (61), be provided with an above umbellule shape projection (63), umbellule shape projection (63) coaxially arranges with porcelain core rod (1).
4. clavate pillar porcelain polymer composite insulator for electric railway according to claim 3, is characterized in that, between adjacent large umbrella shape projection (61), is provided with two umbellule shape projections (63).
5. clavate pillar porcelain polymer composite insulator for electrification railway contact net according to claim 3, is characterized in that, between adjacent large umbrella shape projection (61), is provided with a umbellule shape projection (63).
6. clavate pillar porcelain polymer composite insulator for electric railway according to claim 2, it is characterized in that, the difference that the umbrella of large umbrella shape projection (61) and middle umbrella shape projection (62) stretches out is greater than 15mm, and the difference that the umbrella of middle umbrella shape projection (62) and umbellule shape projection (63) stretches out is greater than 15mm.
7. according to clavate pillar porcelain polymer composite insulator for the electric railway described in claim 4 or 5, it is characterized in that, the difference that the umbrella of large umbrella shape projection (61) and umbellule shape projection (63) stretches out is greater than 15mm.
8. clavate pillar porcelain polymer composite insulator for electric railway according to claim 1, it is characterized in that, it is the full skirt outer of composite insulator and the radial distance between sheath that the umbrella of umbrella shape projection stretches out, and the umbrella spacing of large umbrella shape projection (61) is greater than 0.8 with the ratio that umbrella stretches out; The top rade of the full skirt (6) on polymer jacket (5) is 6 °～16 °, and angle of declination is 0 °; Polymer jacket (5) adopts outdoor type hydrophobicity cycloaliphatic epoxy resin with full skirt (6) material; Adhesive (4) can be the adhesive such as cement or resin.
9. clavate pillar porcelain polymer composite insulator for a kind of electric railway according to claim 1, is characterized in that, gold utensil (3) gold utensil overall dimension structure can need to convert according to installing and using.
10. a clavate pillar porcelain polymer composite insulator preparation method for electric railway, the method comprises:
(1) porcelain core rod is inserted in the centre bore of gold utensil, then by adhesive mucilage binding, is integrated, obtain porcelain core rod-gold utensil complex; Described adhesive is the wherein a kind of of the adhesive such as cement or resin;
(2) in step (1), preliminary treatment is carried out in the employing of the porcelain core rod of porcelain core rod-gold utensil complex surface; Described coupling agent be Kaimoluoke series 607 or 608 etc. coupling agent wherein a kind of;
(3) step (2) gained preliminary treatment porcelain core rod-gold utensil complex is put into the relevant position in mould;
(4) by outdoor type hydrophobicity cycloaliphatic epoxy resin compound injection or be poured in mould, and solidify for the first time, curing temperature is 130-170 ℃; Injection technique is automatic pressure injection molding technique, and feed pressure is 0.1-0.4MPa, and feed time is 3-5min;
(5) then the demoulding solidifies for the second time, and curing temperature is 110-150 ℃, obtains clavate pillar porcelain polymer composite insulator for electric railway.
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