CN113958189A - Novel composite insulating cross arm for power transmission line and manufacturing process thereof - Google Patents
Novel composite insulating cross arm for power transmission line and manufacturing process thereof Download PDFInfo
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- CN113958189A CN113958189A CN202111389938.3A CN202111389938A CN113958189A CN 113958189 A CN113958189 A CN 113958189A CN 202111389938 A CN202111389938 A CN 202111389938A CN 113958189 A CN113958189 A CN 113958189A
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- fiber core
- basalt fiber
- cross arm
- composite insulating
- transmission line
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
-
- 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
- H01B17/56—Insulating bodies
- H01B17/60—Composite insulating bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
Abstract
The invention discloses a novel composite insulating cross arm for a transmission line and a manufacturing process thereof, wherein the novel composite insulating cross arm comprises a basalt fiber core body pipe, an inner filling body filled in the basalt fiber core body pipe, and an insulating outer sleeve wrapped outside the basalt fiber core body pipe; and a wire fitting is installed at one end of the basalt fiber core tube, and a connecting fitting for fixedly connecting the composite insulating cross arm body and the power transmission and transformation equipment component is arranged at the other end of the basalt fiber core tube. On the premise of meeting the insulation performance of the cross arm main body, the composite insulation cross arm greatly reduces the sectional area of the cross arm, and further reduces the total weight of the composite insulation cross arm; the composite insulating cross arm has the effects of strong weather resistance and stable insulating property; simultaneously because the compound insulating cross arm in this application satisfies transmission of electricity mechanical strength, the lightweight design of being convenient for further dwindles transmission of electricity corridor's width to reduce the influence of wind pendulum effect.
Description
Technical Field
The invention relates to the technical field of power transmission line matched components, in particular to a novel composite insulating cross arm for a power transmission line and a manufacturing process thereof.
Background
In the field of electric power facilities, a composite insulating cross arm for a transmission line is an important matched structural member, wherein one end of the composite insulating cross arm is connected with a transmission tower through fixing equipment such as hardware fittings and the like, and the other end of the composite insulating cross arm is connected with a transmission lead; the silicon rubber umbrella skirt on the insulating cross arm is used for increasing the creepage distance and improving the insulating level of the composite insulating cross arm.
The conventional cross arm comprises a wooden cross arm, a steel cross arm, a solid composite insulating cross arm and a filling type composite insulating cross arm. The wooden or iron cross arm is widely applied, but the problems of poor weather resistance, reduced insulation level, wide power transmission corridor, large influence of wind swing and the like can occur in the long-term operation process.
The solid composite insulating cross arm is made of a glass fiber/epoxy resin composite core rod, has certain weather resistance and specific strength, but has larger weight compared with the filled composite insulating cross arm.
The filled composite insulating cross arm is made of a glass fiber/epoxy resin composite material core tube, has the advantages of light weight, but has poor weather resistance, general mechanical strength and low specific strength, so that the size of the filled composite insulating cross arm is larger under the condition of meeting the line strength.
Basalt fiber: continuous fibers drawn from natural basalt. The basalt stone material is melted at 1450-1500 ℃, and then is drawn at high speed by a platinum rhodium alloy wire drawing bushing to form continuous fiber.
The pure natural basalt fiber is generally brown in color. The basalt fiber is a novel inorganic environment-friendly green high-performance fiber material and is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, ferric oxide, titanium dioxide and the like. The basalt continuous fiber has high strength, and also has various excellent performances of electrical insulation, corrosion resistance, high temperature resistance and the like.
In addition, the production process of the basalt fiber determines that the produced waste is less, the environmental pollution is less, and the product can be directly degraded in the environment after being discarded without any harm, so the basalt fiber is a real green and environment-friendly material. Basalt fibers are taken as one of four major fibers (carbon fibers, aramid fibers, ultra-high molecular weight polyethylene and basalt fibers) which are mainly developed in China, and industrial production is realized.
The traditional hand lay-up process is that the reinforcing layer is laid on a mould and is soaked and compacted by a brush, a roller or other materials with the same function, the method capable of improving is that redundant resin is sucked out by using a vacuum bag, the permeability of the resin to glass filaments can be greatly improved by the vacuum bag, and the main result is that the product is stronger and lighter. Experience and principles regarding vacuum bag equipment and technology applications, and vacuum forming process applications, if not well known to vacuum bags.
Disclosure of Invention
The invention aims to provide a novel composite insulating cross arm for a power transmission line and a manufacturing process thereof, and solves the problems of poor weather resistance, reduced insulation level, wide power transmission corridor and wind swing effect in the long-term operation process of the conventional insulating cross arm.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a novel composite insulating cross arm for a transmission line and a manufacturing process thereof, wherein the novel composite insulating cross arm comprises a basalt fiber core body pipe, an inner filling body filled in the basalt fiber core body pipe, and an insulating outer sleeve wrapped outside the basalt fiber core body pipe;
and a wire fitting is installed at one end of the basalt fiber core tube, and a connecting fitting for fixedly connecting the composite insulating cross arm body and the power transmission and transformation equipment component is arranged at the other end of the basalt fiber core tube.
In this embodiment, it is further optimized that the basalt fiber core tube is made by pultrusion of basalt fiber by a pultrusion machine.
In this embodiment, it is further optimized that the inner filler is disposed inside the basalt fiber core tube in a vacuum infusion manner.
In this embodiment, it is further optimized that the basalt fiber core tube is a square tube structure, the wall thickness of the basalt fiber core tube is 8mm to 10mm, the width of the outer frame of the basalt fiber core tube is not less than 42mm, and the height of the outer frame of the basalt fiber core tube is not less than 54 mm.
In this embodiment, it is further optimized that the basalt fiber core pipe is a circular pipe structure, the wall thickness of the basalt fiber core pipe is 8mm to 10mm, and the outer diameter of the basalt fiber core pipe is not less than 42 mm.
In this embodiment, the inner filler is further optimized to include epoxy resin and glass microspheres, where the content of the glass microspheres is 1% to 25% of the content of the epoxy resin.
In this embodiment, it is further optimized that the insulating jacket is disposed on the outer wall of the basalt fiber core tube by an injection process, so that the overall structure ensures that the inner insulation is not affected with moisture and the creepage distance of the insulator is increased.
In this embodiment, it is further optimized that the insulating sheath is an umbrella skirt structure, and is made of silicon rubber vulcanized at high temperature.
The embodiment discloses a manufacturing process of a novel composite insulating cross arm for a transmission line, which comprises the following steps:
step i, preparing a steeping fluid;
injecting a mixed solution of E51 epoxy resin, curing agent methyl tetrahydrophthalic anhydride, accelerator DMP-30, internal mold release agent and pigment into the impregnation tank;
step ii, processing the composite insulating core tube;
introducing basalt fibers into an impregnation tank from a creel for impregnation, then conveying the basalt fibers into a core tube mold, and performing pultrusion and segmented cutting by a tractor and a cutting machine to finally prepare a basalt fiber core tube;
step iii, filling the basalt fiber core pipe;
uniformly mixing E41 epoxy resin and glass beads accounting for 15% of the E41 epoxy resin, mixing methyl tetrahydrophthalic anhydride and an accelerant DMP-30, and finally filling the basalt fiber core tube in the step ii in a vacuum injection mode;
wherein the methyltetrahydrophthalic anhydride is also called methyltetrahydrophthalic anhydride, has 2 isomers, namely 4-methyltetrahydrophthalic anhydride and 3-methyltetrahydrophthalic anhydride, the melting points are 65 ℃ and 63 ℃ respectively, and the methyltetrahydrophthalic anhydride is rarely used as a curing agent independently. The actual commercial product is a liquid mixture of starting isomers. Molecular weight 166.17. The light yellow transparent oily liquid has a relative density of 1.20-1.22. Freezing point < one 20 ℃. The boiling point is 115-155 ℃. The viscosity (25 ℃) is 40 to 80 mPas. The refractive index is 1.4960 ~ 1.4980. The content of anhydride groups is more than or equal to 40 percent. And the neutralization equivalent weight is 81-85. The flash point is 137-150 ℃. Dissolving in acetone, ethanol, toluene, etc. I is good in stability in air and is not easy to separate out crystals.
Wherein the epoxy resin curing accelerator DMP-30 is 2, 4, 6 tri (dimethylaminomethyl) phenol, and belongs to tertiary amine curing agents. Can be used as an epoxy resin curing agent at room temperature, and can also be used as a high-efficiency accelerator of acid anhydride curing agents, polyamide curing agents and aliphatic polyamine curing agents;
the KH550 coupling agent is applied to mineral-filled phenolic, polyester, epoxy, PBT, polyamide, carbonate and other thermoplastic and thermosetting resins, can greatly improve the physical and mechanical properties such as dry-wet bending strength, compressive strength, shear strength and the like and wet electrical properties of reinforced plastics, and improves the wettability and dispersibility of the filler in polymers. The product is an excellent adhesion promoter, and is applied to acrylic coatings, adhesives and sealants.
Step iv, mounting a connecting hardware fitting;
after the solidification of the inner filler in the step iii is finished, placing the basalt fiber core body pipe in a trench of a hardware crimping machine, and respectively installing a wire hardware fitting and a connecting hardware fitting at two ends of the basalt fiber core body pipe through the hardware crimping machine;
step v, manufacturing an insulating outer sleeve;
cleaning the outer surface of the basalt fiber core tube, performing interface treatment, placing the basalt fiber core tube in silicon rubber injection equipment, and injecting high-temperature vulcanized silicon rubber into a mold to form an insulating outer sleeve so as to wrap the basalt fiber core tube.
In this embodiment, it is further optimized that, in step iii, the glass micro beads are surface-treated by a KH550 coupling agent solution for reducing the interface defects of the glass micro beads.
Compared with the prior art, the invention has the beneficial technical effects that:
on the premise of meeting the insulation performance of the cross arm main body, the composite insulation cross arm greatly reduces the sectional area of the cross arm, and further reduces the total weight of the composite insulation cross arm;
the composite insulating cross arm has the effects of strong weather resistance and stable insulating property;
simultaneously because the compound insulating cross arm in this application satisfies transmission of electricity mechanical strength, the lightweight design of being convenient for further dwindles transmission of electricity corridor's width to reduce the influence of wind pendulum effect.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
Fig. 1 is a schematic main body view of a novel composite insulating cross arm for a power transmission line according to the present invention;
description of reference numerals:
1. an inner filler;
2. a basalt fiber core tube;
3. an insulating outer sleeve;
4. a wire hardware fitting;
5. and connecting the hardware fitting.
Detailed Description
Examples
As shown in fig. 1: the embodiment discloses a novel composite insulating cross arm for a power transmission line, which comprises a basalt fiber core tube 1, an inner filler 2 filled in the basalt fiber core tube 1 and an insulating outer sleeve 3 wrapped outside the basalt fiber core tube 1;
one end of the basalt fiber core tube 1 is provided with a wire hardware fitting 4, and the other end of the basalt fiber core tube is provided with a connecting hardware fitting 5 for fixedly connecting the composite insulating cross arm body and the power transmission and transformation equipment component;
compared with the conventional material, the basalt fiber composite material has higher mechanical strength and weather resistance, so that the size of the composite insulating cross arm can be reduced while the line strength is met by adopting the basalt fiber composite material to manufacture the core tube, and the lightweight design of the insulating cross arm is facilitated.
The basalt fiber is a novel inorganic environment-friendly green high-performance fiber material and is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, ferric oxide, titanium dioxide and the like. The basalt continuous fiber has high strength, and also has various excellent performances of electrical insulation, corrosion resistance, high temperature resistance and the like. In addition, the production process of the basalt fiber determines that the produced waste is less, the environmental pollution is less, and the product can be directly degraded in the environment after being discarded without any harm, so the basalt fiber is a real green and environment-friendly material. It has been widely used in various fields and the like.
In the embodiment, the basalt fiber core pipe 1 is manufactured by pultrusion of basalt fibers by a pultrusion machine; specifically, the basalt fiber is a continuous fiber drawn from natural basalt. The basalt stone material is melted at 1450-1500 ℃, and then is drawn at high speed by a platinum rhodium alloy wire drawing bushing to form continuous fiber. The pure natural basalt fiber is generally brown in color.
Specifically, the basalt fiber core tube 1 is of a square tube structure, the wall thickness of the basalt fiber core tube is 8mm-10mm, the width of an outer frame of the basalt fiber core tube is not less than 42mm, and the height of the outer frame of the basalt fiber core tube is not less than 54 mm;
in this embodiment, the basalt fiber core pipe 1 may also be a circular pipe structure, the wall thickness of the basalt fiber core pipe is 8mm to 10mm, and the outer diameter of the basalt fiber core pipe is not less than 42 mm;
the composite insulating cross arm has the effects of strong weather resistance and stable insulating property; meanwhile, the composite insulating cross arm meets the power transmission mechanical strength, so that the lightweight design is facilitated, the width of a power transmission corridor is further reduced, and the influence of a wind swing effect is reduced;
thereby play the prerequisite that can guarantee to satisfy the line strength demand, save material simultaneously reduces the width in transmission of electricity corridor.
In this embodiment, the inner filler 2 is filled in the basalt fiber core tube 1 in a vacuum infusion manner;
the vacuum infusion process refers to the infusion of resin by the force of a vacuum. The material is laid flat on the mould and the resin is introduced after evacuation. To achieve complete vacuum, the resin penetrates the ply layer by layer through the pipe, and the process is classified according to different manufacturers and materials.
The traditional hand lay-up process is that the reinforcing layer is laid on a mould and is soaked and compacted by a brush, a roller or other materials with the same function, the method capable of improving is that redundant resin is sucked out by using a vacuum bag, the permeability of the resin to glass filaments can be greatly improved by the vacuum bag, and the main result is that the product is stronger and lighter. Experience and principles regarding vacuum bag equipment and technology applications, and vacuum forming process applications, if not well known to vacuum bags.
The inner filler 2 comprises epoxy resin and glass microspheres, wherein the content of the glass microspheres is 1% -25% of the content of the epoxy resin;
wherein, vacuum infusion: when evacuated, the fibers are dry. From the above viewpoint, the epoxy resin is introduced by the force of vacuum, and the suction of the excess epoxy resin is better than that immediately before. The vacuum infusion was started without the epoxy resin being introduced.
In fact, the excess epoxy is drawn through the vacuum tube, resulting in minimal epoxy introduction, which reduces weight, increases strength, and maximizes epoxy and fiber savings. The parts can be formed by vacuum infusion to a very flat level.
In this embodiment, specifically, the content of the glass microspheres is any one of 6%, 12% and 18% of the epoxy resin content, and the epoxy resin in this embodiment may also be replaced by a modified epoxy resin, so that the overall composite insulating cross arm has a light weight, and the composite insulating cross arm has an insulating function inside, thereby further improving the insulating performance.
In this embodiment, the insulating jacket 3 is arranged on the outer wall of the basalt fiber core pipe 1 by an injection process, and the insulating jacket 3 is of an umbrella skirt structure;
the insulating outer sleeve 3 is made of silicon rubber vulcanized at high temperature, so that the integral structure ensures that the inner insulation is not affected with damp, and the creepage distance of the insulator is increased.
The application discloses manufacturing process of novel composite insulation cross arm for power transmission line, including the following steps:
step i, preparing a steeping fluid;
injecting a mixed solution of E51 epoxy resin, curing agent methyl tetrahydrophthalic anhydride, accelerator DMP-30, internal mold release agent and pigment into the impregnation tank; the impregnating solution is equivalent to glue for sticking the basalt fibers together, the continuous fibers are dragged into a die through the impregnating solution in the process, and a core tube is formed by heating and pressurizing, so that the basalt fiber core tube composite material takes the basalt fibers as a reinforcing material and takes the epoxy resin as a matrix material;
epoxy resin type E51: epoxy resin is a thermosetting polymer synthetic material with good bonding, corrosion resistance, insulation, high strength and other properties.
The technical indexes of the E51 type epoxy resin are as follows:
no obvious mechanical impurity
An epoxy value (eq/100g) of 0.48 to 0.54
Inorganic chlorine value (eq/100g) is less than or equal to 1 x 10-3
Organic chlorine value (eq/100g) is less than or equal to 2 x 10-2
The color number of volatile (percent) is less than or equal to 2, and the viscosity is less than or equal to 40 ℃ (mPa.
In this embodiment, methyl tetrahydrophthalic anhydride, also called methyl tetrahydrophthalic anhydride, abbreviated as MeTHPA, has 2 isomers, namely 4-methyl tetrahydrophthalic anhydride and 3-methyl tetrahydrophthalic anhydride, with melting points of 65 ℃ and 63 ℃ respectively, and is rarely used alone as a curing agent. The actual commercial product is a liquid mixture of starting isomers. Molecular weight 166.17. The light yellow transparent oily liquid has a relative density of 1.20-1.22. Freezing point < one 20 ℃. The boiling point is 115-155 ℃. The viscosity (25 ℃) is 40 to 80 mPas. The refractive index is 1.4960 ~ 1.4980. The content of anhydride groups is more than or equal to 40 percent. And the neutralization equivalent weight is 81-85. The flash point is 137-150 ℃. Dissolving in acetone, ethanol, toluene, etc. I is good in stability in air and is not easy to separate out crystals. Low toxicity, LD502102 mg/kg;
wherein the epoxy resin curing accelerator DMP-30 is 2, 4, 6 tri (dimethylaminomethyl) phenol, and belongs to tertiary amine curing agents. Can be used as an epoxy resin curing agent at room temperature, and also can be used as a high-efficiency accelerator of acid anhydride curing agents, polyamide curing agents and aliphatic polyamine curing agents.
The internal release agent is a polymer forming processing aid added in a polymer material system. The method has the advantages that the adhesive force of the in-mold molded product on the mold cavity wall is reduced, the demolding is convenient, the finished product rate and the labor production efficiency are improved, and compared with the external demolding agent which is independently sprayed on the mold cavity wall before the injection molding.
Step ii, processing the composite insulating core tube;
introducing basalt fibers into an impregnation tank from a creel for impregnation, then conveying the basalt fibers into a core tube mold, and performing pultrusion and segmented cutting by a tractor and a cutting machine to finally prepare a basalt fiber core tube;
step iii, filling the basalt fiber core pipe;
the preparation method comprises the following steps of performing surface treatment on glass beads through a KH550 coupling agent solution to reduce interface defects of the glass beads, uniformly mixing E41 epoxy resin with glass beads accounting for 15% of E41 epoxy resin, mixing methyl tetrahydrophthalic anhydride and an accelerant DMP-30, wherein the methyl tetrahydrophthalic anhydride has a curing effect on the mixture of the epoxy resin and the glass beads as a filler, and finally filling the mixture into the basalt fiber core tube in the step ii in a vacuum injection mode;
the KH550 coupling agent is applied to mineral-filled phenolic, polyester, epoxy, PBT, polyamide, carbonate and other thermoplastic and thermosetting resins, can greatly improve the physical and mechanical properties such as dry-wet bending strength, compressive strength, shear strength and the like and wet electrical properties of reinforced plastics, and improves the wettability and dispersibility of the filler in polymers. The product is an excellent adhesion promoter, and is applied to acrylic coatings, adhesives and sealants;
step iv, mounting a connecting hardware fitting;
after the solidification of the inner filler in the step iii is finished, placing the basalt fiber core body pipe in a trench of a hardware crimping machine, and respectively installing a wire hardware fitting and a connecting hardware fitting at two ends of the basalt fiber core body pipe through the hardware crimping machine;
step v, manufacturing an insulating outer sleeve;
cleaning the outer surface of the basalt fiber core tube, performing interface treatment, placing the basalt fiber core tube in silicon rubber injection equipment, and injecting high-temperature vulcanized silicon rubber into a mold to form an insulating outer sleeve so as to wrap the basalt fiber core tube.
The composite insulation cross arm in the application greatly reduces the sectional area of the cross arm and further reduces the total weight of the composite insulation cross arm on the premise of meeting the insulation performance of the cross arm main body.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a novel compound insulating cross arm that transmission line was used which characterized in that: the basalt fiber core body pipe is filled with an inner filling body and an insulating outer sleeve, wherein the insulating outer sleeve is wrapped outside the basalt fiber core body pipe; and a wire fitting is installed at one end of the basalt fiber core tube, and a connecting fitting for fixedly connecting the composite insulating cross arm body and the power transmission and transformation equipment component is arranged at the other end of the basalt fiber core tube.
2. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the basalt fiber core pipe is manufactured by pultrusion of basalt fibers through a pultrusion machine.
3. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the inner filling body is arranged in the basalt fiber core tube in a vacuum filling mode.
4. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the basalt fiber core pipe is of a square pipe structure, the wall thickness of the basalt fiber core pipe is 8mm-10mm, the width of an outer frame of the basalt fiber core pipe is not less than 42mm, and the height of the outer frame of the basalt fiber core pipe is not less than 54 mm.
5. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the basalt fiber core pipe is of a circular pipe structure, the wall thickness of the basalt fiber core pipe is 8mm-10mm, and the outer diameter of the basalt fiber core pipe is not less than 42 mm.
6. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the inner filler comprises epoxy resin and glass microspheres, wherein the content of the glass microspheres is 1% -25% of the content of the epoxy resin.
7. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the insulating outer sleeve is arranged on the outer wall of the basalt fiber core pipe through an injection process, so that the integral structure ensures that the inner insulation is not affected with damp and the creepage distance of the insulator is increased.
8. The novel composite insulating cross arm for the transmission line according to claim 1, characterized in that: the insulating outer sleeve is of an umbrella skirt structure and is made of silicon rubber subjected to high-temperature vulcanization.
9. A manufacturing process of a novel composite insulating cross arm for a transmission line is characterized by comprising the following steps:
step i, preparing a steeping fluid;
injecting a mixed solution of E51 epoxy resin, curing agent methyl tetrahydrophthalic anhydride, accelerator DMP-30, internal mold release agent and pigment into the impregnation tank;
step ii, processing the composite insulating core tube;
introducing basalt fibers into an impregnation tank from a creel for impregnation, then conveying the basalt fibers into a core tube mold, and performing pultrusion and segmented cutting by a tractor and a cutting machine to finally prepare a basalt fiber core tube;
step iii, filling the basalt fiber core pipe;
uniformly mixing E41 epoxy resin and glass beads accounting for 15% of the E41 epoxy resin, mixing methyl tetrahydrophthalic anhydride and an accelerant DMP-30, and finally filling the basalt fiber core tube in the step ii in a vacuum injection mode;
step iv, mounting a connecting hardware fitting;
after the solidification of the inner filler in the step iii is finished, placing the basalt fiber core body pipe in a trench of a hardware crimping machine, and respectively installing a wire hardware fitting and a connecting hardware fitting at two ends of the basalt fiber core body pipe through the hardware crimping machine;
step v, manufacturing an insulating outer sleeve;
cleaning the outer surface of the basalt fiber core tube, performing interface treatment, placing the basalt fiber core tube in silicon rubber injection equipment, and injecting high-temperature vulcanized silicon rubber into a mold to form an insulating outer sleeve so as to wrap the basalt fiber core tube.
10. The manufacturing process of the novel composite insulating cross arm for the transmission line according to claim 9, characterized in that: wherein in step iii, the glass micro beads are surface-treated by a KH550 coupling agent solution for reducing interfacial defects of the glass micro beads.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110359427.0A CN112963042A (en) | 2021-04-02 | 2021-04-02 | Novel composite insulating cross arm for power transmission line and manufacturing process thereof |
| CN2021103594270 | 2021-04-02 |
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| CN113958189A true CN113958189A (en) | 2022-01-21 |
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| CN202110359427.0A Withdrawn CN112963042A (en) | 2021-04-02 | 2021-04-02 | Novel composite insulating cross arm for power transmission line and manufacturing process thereof |
| CN202111389938.3A Pending CN113958189A (en) | 2021-04-02 | 2021-11-19 | Novel composite insulating cross arm for power transmission line and manufacturing process thereof |
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| CN202110359427.0A Withdrawn CN112963042A (en) | 2021-04-02 | 2021-04-02 | Novel composite insulating cross arm for power transmission line and manufacturing process thereof |
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| CN113635571A (en) * | 2021-09-08 | 2021-11-12 | 广西电网有限责任公司电力科学研究院 | Basalt fiber reinforced composite insulating cross arm device and preparation method thereof |
| CN114412268A (en) * | 2021-12-31 | 2022-04-29 | 浙江华保电力科技股份有限公司 | Enhancement mode does not have umbrella stereoplasm composite insulation cross arm |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123131A (en) * | 2006-08-11 | 2008-02-13 | 南通市神马电力科技有限公司 | A compound supporting pole insulator with extrusion bar as internal core and its making method |
| CN101832050A (en) * | 2009-11-06 | 2010-09-15 | 常熟风范电力设备股份有限公司 | Composite material pole tower and manufacturing process thereof |
| CN102074323A (en) * | 2009-11-23 | 2011-05-25 | 常熟风范电力设备股份有限公司 | Novel insulating cross arm and manufacturing process thereof |
| CN103280276A (en) * | 2013-05-24 | 2013-09-04 | 国家电网公司 | Composite cross arm and manufacturing process thereof |
| CN106320797A (en) * | 2016-08-25 | 2017-01-11 | 陕西泰普瑞电工绝缘技术有限公司 | Hard umbrella skirt composite insulated cross arm for use at high voltage and manufacturing device and method thereof |
| CN111081434A (en) * | 2019-12-31 | 2020-04-28 | 衡水瑞纤新材料科技有限公司 | Basalt fiber insulator core rod |
-
2021
- 2021-04-02 CN CN202110359427.0A patent/CN112963042A/en not_active Withdrawn
- 2021-11-19 CN CN202111389938.3A patent/CN113958189A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123131A (en) * | 2006-08-11 | 2008-02-13 | 南通市神马电力科技有限公司 | A compound supporting pole insulator with extrusion bar as internal core and its making method |
| CN101832050A (en) * | 2009-11-06 | 2010-09-15 | 常熟风范电力设备股份有限公司 | Composite material pole tower and manufacturing process thereof |
| CN102074323A (en) * | 2009-11-23 | 2011-05-25 | 常熟风范电力设备股份有限公司 | Novel insulating cross arm and manufacturing process thereof |
| CN103280276A (en) * | 2013-05-24 | 2013-09-04 | 国家电网公司 | Composite cross arm and manufacturing process thereof |
| CN106320797A (en) * | 2016-08-25 | 2017-01-11 | 陕西泰普瑞电工绝缘技术有限公司 | Hard umbrella skirt composite insulated cross arm for use at high voltage and manufacturing device and method thereof |
| CN111081434A (en) * | 2019-12-31 | 2020-04-28 | 衡水瑞纤新材料科技有限公司 | Basalt fiber insulator core rod |
Non-Patent Citations (1)
| Title |
|---|
| 王晓东: "环氧树脂基轻质隔热复合材料制备及隔热机理研究", 工程科技Ⅰ辑, pages 019 - 99 * |
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