CN112562937A - Line column type composite insulator and preparation method thereof - Google Patents
Line column type composite insulator and preparation method thereof Download PDFInfo
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- CN112562937A CN112562937A CN202011376417.XA CN202011376417A CN112562937A CN 112562937 A CN112562937 A CN 112562937A CN 202011376417 A CN202011376417 A CN 202011376417A CN 112562937 A CN112562937 A CN 112562937A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/32—Single insulators consisting of two or more dissimilar insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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Abstract
The invention discloses a line column type composite insulator and a preparation method thereof, wherein the line column type composite insulator comprises an insulating core rod, an upper accessory connected to one end of the insulating core rod, a lower accessory connected to the other end of the insulating core rod, and an umbrella skirt sheath coated on the insulating core rod, the upper accessory and the lower accessory; the upper accessory comprises the following components in parts by weight: 43-50 parts of polyamide 66, 18-25 parts of polyamide 6, 2-4 parts of toughening agent, 0.1-0.5 part of coupling agent, 28-32 parts of glass fiber, 1-3 parts of silicone master batch, 0.1-0.5 part of first antioxidant, 0.1-0.5 part of second antioxidant, 0.1-0.5 part of ultraviolet absorbent and 0.1-0.5 part of light stabilizer. The invention is not easy to wear without changing the structure of the whole product, the arc distance of the insulator is lengthened, the power frequency withstand voltage and the impact withstand voltage of the product are obviously improved, and the electric field distribution at the upper end is more uniform.
Description
Technical Field
The invention relates to the technical field of electric power transmission and distribution line insulators, in particular to a line column type composite insulator and a preparation method thereof.
Background
The line column type composite insulator is widely applied to electric power transmission and distribution lines, and not only needs to bear the action of working voltage and overvoltage, but also needs to bear the action of load and tension of a lead in an overhead transmission line. In the existing line column type composite insulator used in the transmission line, a wire is directly connected with a wire groove of an accessory at the upper end of the top of the insulator, and the accessory at the upper end mostly adopts a metal piece of a hot galvanizing process. On the contact surface of the wire and the wire groove of the accessory at the upper end of the insulator, the insulating skin of the wire and the metal piece are rubbed for a long time to break the skin, and the discharge phenomenon is easy to generate under the operating voltage.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a line column type composite insulator and a preparation method thereof, under the condition of not changing the structural form of the whole product, the line column type composite insulator is not easy to wear, the arc distance of the insulator is lengthened, the power frequency withstand voltage and the impact withstand voltage of the product are obviously improved, and the electric field distribution at the upper end is more uniform.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a line column type composite insulator comprises an insulating core rod, an upper accessory connected to one end of the insulating core rod, a lower accessory connected to the other end of the insulating core rod, and a shed sheath covering the insulating core rod, the upper accessory and the lower accessory;
the upper accessory comprises the following components in parts by weight: 43-50 parts of polyamide 66, 18-25 parts of polyamide 6, 2-4 parts of toughening agent, 0.1-0.5 part of coupling agent, 28-32 parts of glass fiber, 1-3 parts of silicone master batch, 0.1-0.5 part of first antioxidant, 0.1-0.5 part of second antioxidant, 0.1-0.5 part of ultraviolet absorbent and 0.1-0.5 part of light stabilizer.
Furthermore, the diameter of the umbrella piece on the umbrella skirt sheath close to the upper accessory is larger than that of other umbrella pieces.
Further, the upper accessory also comprises the following components in parts by weight: 1-3 parts of color master batch.
Further, the toughening agent is a toughening agent ST-4182M 2.
Further, the coupling agent is a coupling agent KH-560.
Further, the first antioxidant is antioxidant 1098.
Further, the second antioxidant is antioxidant 1010.
Further, the ultraviolet absorbent is ChiguardN-442.
Further, the light stabilizer is a light stabilizer 5591.
A method for preparing a line column type composite insulator comprises the following steps:
step 1: stirring and uniformly mixing the polyamide 66, the polyamide 6, the toughening agent, the coupling agent, the glass fiber, the silicone master batch, the first antioxidant, the second antioxidant, the ultraviolet absorber and the light stabilizer;
step 2: extruding the mixture obtained in the step 1 in an extruder to obtain granules;
and step 3: connecting the granular material obtained in the step (2) with one end of the insulating core rod in an injection molding mode to obtain a semi-finished core body containing an upper accessory;
and 4, step 4: connecting the other end of the insulating core rod of the semi-finished core body obtained in the step 3 with a lower accessory in a compression joint mode to obtain a finished core body;
and 5: cleaning the finished product core body obtained in the step 4, spraying a binder on the finished product core body, and heating;
step 6: and (5) injecting the shed sheath on the finished product core body pretreated in the step (5) to obtain the composite insulator.
Compared with the prior art, the invention has at least the following beneficial effects: according to the line column type composite insulator provided by the invention, the upper accessory is made of the novel composite material, the upper accessory of the novel composite material and the insulating sheath of the lead are made of similar materials, the abrasion is not easy to occur under the condition that the structural form of an integral product is not changed, the arc distance of the insulator is lengthened, the power frequency withstand voltage and the impact withstand voltage of the insulator are obviously improved, and the electric field distribution at the upper end of the insulator is more uniform.
Furthermore, the diameters of the umbrella pieces close to the upper accessory on the umbrella skirt sheath are larger than those of other umbrella pieces, so that the umbrella skirt sheath can prevent dirt bridging under special weather conditions, and the dirt performance of the umbrella skirt sheath is improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a post-type composite insulator according to the present invention;
FIG. 2 is a schematic structural view of a semi-finished core of the present invention;
fig. 3 is a schematic structural view of a finished core of the present invention.
In the figure: 1-upper attachment; 2-lower attachment; 3-insulating core rod; 4-umbrella skirt sheath; 41-large umbrella; 42-middle umbrella; 43-small umbrella.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As one embodiment of the present invention, as shown in fig. 1, 2 and 3, a line post type composite insulator includes an insulating core rod 3, an upper attachment 1 connected to one end of the insulating core rod 3, a lower attachment 2 connected to the other end of the insulating core rod 3, and a shed sheath 4 covering the insulating core rod 3, the upper attachment 1 and the lower attachment 2.
In a natural environment, various floating dust particles in the atmosphere are easy to deposit on the upper end accessories and the surface of the insulator under the action of an electric field force, and the insulator is easy to trip in a large-area flashover in a wind, sand, rain, snow and fog weather. Therefore, as shown in fig. 1, the skirt guard 4 includes a large umbrella 41, a middle umbrella 42 and a small umbrella 43, and the diameter of the umbrella piece of the skirt guard 4 near the upper attachment 1 is larger than that of the other umbrella pieces. Specifically, the shed sheaths 4 coated on the insulating core rod 3, the upper accessory 1 and the lower accessory 2 are arranged at intervals of large, medium and small, and the first umbrella close to the upper accessory 1 is an enlarged umbrella. Such structural design can prevent filth bridging under the special weather condition, has improved the filth performance of product.
The upper accessory 1 is made of a novel composite material, and specifically, the upper accessory 1 comprises the following components in parts by weight: 43-50 parts of polyamide 66, 18-25 parts of polyamide 6, 2-4 parts of toughening agent, 0.1-0.5 part of coupling agent, 28-32 parts of glass fiber, 1-3 parts of silicone master batch, 0.1-0.5 part of first antioxidant, 0.1-0.5 part of second antioxidant, 0.1-0.5 part of ultraviolet absorbent and 0.1-0.5 part of light stabilizer.
As a preferred embodiment, the upper accessory 1 further comprises 1-3 parts of color masterbatch according to the parts by weight.
The upper accessory 1 and the insulating core rod 3 are connected in an injection molding mode, and the lower accessory 2 and the insulating core rod 3 are connected in a compression joint mode.
In the following examples 1 to 3, the toughening agents are toughening agents ST-4182M2, the coupling agents are coupling agents KH-560, the first antioxidants are antioxidants 1098, the second antioxidants are antioxidants 1010, the ultraviolet absorbers are ultraviolet absorbers ChiguardN-442, and the light stabilizers are light stabilizers 5591.
Example 1
A preparation method of a line column type composite insulator comprises the following steps:
step 1: selecting polyamide 6643 parts, polyamide 620 parts, toughening agent 2 parts, coupling agent 0.1 part, glass fiber 28 parts, silicone master batch 2 parts, first antioxidant 0.1 part, second antioxidant 0.1 part, ultraviolet absorbent 0.2 part, light stabilizer 0.5 part and color master batch 1 part as raw materials, putting the raw materials into a stirrer, and uniformly mixing for 15 minutes in forward rotation and 15 minutes in reverse rotation;
step 2: putting the mixture obtained in the step 1 into a double-screw extruder for extrusion, wherein the nine-section temperature of a machine barrel is respectively as follows: zone 1: 230 ℃, zone 2: 235 ℃, zone 3: 240 ℃, zone 4: 245 ℃, zone 5: 250 ℃, zone 6: 250 ℃, zone 7: 255 ℃, zone 8: 255 ℃, zone 9: 255 ℃, head temperature: 260 ℃; the rotating speed of the screw main machine is 310r/min, and the particle material with the length of 5mm is finally prepared by the process.
And step 3: connecting the granular material obtained in the step (2) with one end of an insulating core rod (3) in an injection molding mode to obtain a semi-finished core body containing the upper accessory (1);
and 4, step 4: connecting the other end of the insulating core rod 3 of the semi-finished core body obtained in the step 3 with the lower accessory 2 in a crimping mode to obtain a finished core body;
and 5: cleaning pollutants on the surface of the finished product core body by using absolute ethyl alcohol, naturally drying, spraying an adhesive formed by mixing the absolute ethyl alcohol and a silane coupling agent in a volume ratio of 3:1 on the surface of the finished product core body, heating to 90-120 ℃, and keeping for 2 hours to ensure the adhesiveness of the adhesive;
step 6: coating an outer umbrella skirt sheath on the finished core pretreated in the step 5 by adopting an injection method to obtain a stain-resistant high-voltage-resistant line column type composite insulator; the injection pressure is 15Mpa, temperature is 150 deg.C, and time is 600 s.
Example 2
A preparation method of a line column type composite insulator comprises the following steps:
step 1: selecting polyamide 6645 parts, polyamide 618 parts, toughening agent 3 parts, coupling agent 0.2 part, glass fiber 30 parts, silicone master batch 1 part, first antioxidant 0.3 part, second antioxidant 0.3 part, ultraviolet absorbent 0.1 part, light stabilizer 0.2 part and color master batch 3 parts as raw materials, putting the raw materials into a stirrer, and uniformly mixing for 15 minutes in forward rotation and 15 minutes in reverse rotation;
step 2: putting the mixture obtained in the step 1 into a double-screw extruder for extrusion, wherein the nine-section temperature of a machine barrel is respectively as follows: zone 1: 230 ℃, zone 2: 235 ℃, zone 3: 240 ℃, zone 4: 245 ℃, zone 5: 250 ℃, zone 6: 250 ℃, zone 7: 255 ℃, zone 8: 255 ℃, zone 9: 255 ℃, head temperature: 260 ℃; the rotating speed of the screw main machine is 310r/min, and the particle material with the length of 5mm is finally prepared by the process.
And step 3: connecting the granular material obtained in the step (2) with one end of an insulating core rod (3) in an injection molding mode to obtain a semi-finished core body containing the upper accessory (1);
and 4, step 4: connecting the other end of the insulating core rod 3 of the semi-finished core body obtained in the step 3 with the lower accessory 2 in a crimping mode to obtain a finished core body;
and 5: cleaning pollutants on the surface of the finished product core body by using absolute ethyl alcohol, naturally drying, spraying an adhesive formed by mixing the absolute ethyl alcohol and a silane coupling agent in a volume ratio of 3:1 on the surface of the finished product core body, heating to 90-120 ℃, and keeping for 2 hours to ensure the adhesiveness of the adhesive;
step 6: coating an outer umbrella skirt sheath on the finished core pretreated in the step 5 by adopting an injection method to obtain a stain-resistant high-voltage-resistant line column type composite insulator; the injection pressure is 15Mpa, temperature is 150 deg.C, and time is 600 s.
Example 3
A preparation method of a line column type composite insulator comprises the following steps:
step 1: selecting polyamide 6650 parts, polyamide 625 parts, toughening agent 4 parts, coupling agent 0.5 part, glass fiber 32 parts, silicone master batch 3 parts, first antioxidant 0.5 part, second antioxidant 0.5 part, ultraviolet absorbent 0.5 part, light stabilizer 0.1 part and color master batch 3 parts as raw materials, putting the raw materials into a stirrer, and uniformly mixing for 15 minutes in forward rotation and 15 minutes in reverse rotation;
step 2: putting the mixture obtained in the step 1 into a double-screw extruder for extrusion, wherein the nine-section temperature of a machine barrel is respectively as follows: zone 1: 230 ℃, zone 2: 235 ℃, zone 3: 240 ℃, zone 4: 245 ℃, zone 5: 250 ℃, zone 6: 250 ℃, zone 7: 255 ℃, zone 8: 255 ℃, zone 9: 255 ℃, head temperature: 260 ℃; the rotating speed of the screw main machine is 310r/min, and the particle material with the length of 5mm is finally prepared by the process.
And step 3: connecting the granular material obtained in the step (2) with one end of an insulating core rod (3) in an injection molding mode to obtain a semi-finished core body containing the upper accessory (1);
and 4, step 4: connecting the other end of the insulating core rod 3 of the semi-finished core body obtained in the step 3 with the lower accessory 2 in a crimping mode to obtain a finished core body;
and 5: cleaning pollutants on the surface of the finished product core body by using absolute ethyl alcohol, naturally drying, spraying an adhesive formed by mixing the absolute ethyl alcohol and a silane coupling agent in a volume ratio of 3:1 on the surface of the finished product core body, heating to 90-120 ℃, and keeping for 2 hours to ensure the adhesiveness of the adhesive;
step 6: coating an outer umbrella skirt sheath on the finished core pretreated in the step 5 by adopting an injection method to obtain a stain-resistant high-voltage-resistant line column type composite insulator; the injection pressure is 15Mpa, temperature is 150 deg.C, and time is 600 s.
Comparative example 1
The external structure of the line post type composite insulator is the same as that of the embodiment 1, the embodiment 2 and the embodiment 3, and the difference is that: the upper accessory 1 is made of 45# hot galvanizing material instead of a novel composite material.
Comparative example 2
The outer sheds of the line column type composite insulator are arranged at small and medium intervals, and the rest is the same as that of the embodiment 1, the embodiment 2 and the embodiment 3.
A sample prepared from the novel composite material granules of the upper accessory 1 prepared in the embodiment 1-3 is subjected to tensile strength, bending strength and simple beam impact strength performance tests, wherein the tensile strength is tested according to the ISO527-2 standard, the bending strength is tested according to the ISO178 standard, the simple beam impact strength is tested according to the ISO179 standard, and the performance test results are shown in Table 1.
TABLE 1
The performance of the insulators prepared in examples 1 to 3 and comparative examples 1 to 2 was tested, and the test results are shown in table 2.
Reference of artificial pollution tolerance voltage: GB4585 tests;
dry power frequency flashover voltage reference: GB/T16927.1-2011;
wet line frequency flashover voltage reference: GB/T16927.1-2011.
TABLE 2
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A line column type composite insulator is characterized by comprising an insulating core rod (3), an upper accessory (1) connected to one end of the insulating core rod (3), a lower accessory (2) connected to the other end of the insulating core rod (3), and a shed sheath (4) covering the insulating core rod (3), the upper accessory (1) and the lower accessory (2);
the upper accessory (1) comprises the following components in parts by weight: 43-50 parts of polyamide 66, 18-25 parts of polyamide 6, 2-4 parts of toughening agent, 0.1-0.5 part of coupling agent, 28-32 parts of glass fiber, 1-3 parts of silicone master batch, 0.1-0.5 part of first antioxidant, 0.1-0.5 part of second antioxidant, 0.1-0.5 part of ultraviolet absorbent and 0.1-0.5 part of light stabilizer.
2. A line post type composite insulator according to claim 1, wherein the diameter of the sheds on the sheds sheath (4) near the upper attachment (1) is larger than the diameter of the other sheds.
3. A line and post type composite insulator according to claim 1, wherein the upper attachment (1) further comprises, in parts by weight: 1-3 parts of color master batch.
4. The post type composite insulator of claim 1, wherein said toughening agent is toughening agent ST-4182M 2.
5. The post type composite insulator of claim 1, wherein said coupling agent is KH-560.
6. The post type composite insulator of claim 1, wherein said first antioxidant is antioxidant 1098.
7. The post type composite insulator of claim 1, wherein said second antioxidant is antioxidant 1010.
8. The post type composite insulator of claim 1, wherein said uv absorber is ChiguardN-442.
9. The post type composite insulator of claim 1, wherein said light stabilizer is 5591.
10. The method for preparing the line post type composite insulator as claimed in any one of claims 1 to 9, wherein the method comprises the following steps:
step 1: stirring and uniformly mixing the polyamide 66, the polyamide 6, the toughening agent, the coupling agent, the glass fiber, the silicone master batch, the first antioxidant, the second antioxidant, the ultraviolet absorber and the light stabilizer;
step 2: extruding the mixture obtained in the step 1 in an extruder to obtain granules;
and step 3: connecting the granular material obtained in the step (2) with one end of the insulating core rod (3) in an injection molding mode to obtain a semi-finished core body containing the upper accessory (1);
and 4, step 4: connecting the other end of the insulating core rod (3) of the semi-finished core body obtained in the step (3) with the lower accessory (2) in a compression joint mode to obtain a finished core body;
and 5: cleaning the finished product core body obtained in the step 4, spraying a binder on the finished product core body, and heating;
step 6: and (5) injecting the shed sheath (4) on the finished core pretreated in the step (5) to obtain the composite insulator.
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| CN202011376417.XA CN112562937A (en) | 2020-11-30 | 2020-11-30 | Line column type composite insulator and preparation method thereof |
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| CN101740177A (en) * | 2008-11-12 | 2010-06-16 | 戴海永 | Composite insulated sleeve |
| CN202110896U (en) * | 2010-12-28 | 2012-01-11 | 河南博特电气有限公司 | Novel composite suspension insulator |
| CN204537771U (en) * | 2015-04-28 | 2015-08-05 | 河北盛达电力器材有限公司 | The anti-bird pest composite insulator of electrification railway contact net clavate pillar |
| CN204695876U (en) * | 2015-03-20 | 2015-10-07 | 高鸿阁 | The anti-bird pest bar-shaped composite insulator of a kind of contact nets in electrified railways |
| CN206312666U (en) * | 2016-11-29 | 2017-07-07 | 河北新华高压电器股份有限公司 | A kind of dirty bar-shaped composite insulator of novel antifouling |
| CN107680755A (en) * | 2017-09-18 | 2018-02-09 | 西安唯实输配电技术有限公司 | Railway contact line high intensity bar-shaped composite insulator under extreme meteorological condition |
| CN111621149A (en) * | 2020-06-02 | 2020-09-04 | 西安唯实输配电技术有限公司 | Nylon material for pin type composite insulator cap-shaped connector for power grid transmission and distribution line and forming method |
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2020
- 2020-11-30 CN CN202011376417.XA patent/CN112562937A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2454682A1 (en) * | 2001-08-07 | 2003-02-20 | Pacific Engineering Corp. | Polyamide resin composition for fuse element and fuse element |
| CN101740177A (en) * | 2008-11-12 | 2010-06-16 | 戴海永 | Composite insulated sleeve |
| CN202110896U (en) * | 2010-12-28 | 2012-01-11 | 河南博特电气有限公司 | Novel composite suspension insulator |
| CN204695876U (en) * | 2015-03-20 | 2015-10-07 | 高鸿阁 | The anti-bird pest bar-shaped composite insulator of a kind of contact nets in electrified railways |
| CN204537771U (en) * | 2015-04-28 | 2015-08-05 | 河北盛达电力器材有限公司 | The anti-bird pest composite insulator of electrification railway contact net clavate pillar |
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