CN111785563B - Gao Wenzhu-resistant shielding cylinder for vacuum arc extinguishing chamber and manufacturing method thereof - Google Patents
Gao Wenzhu-resistant shielding cylinder for vacuum arc extinguishing chamber and manufacturing method thereof Download PDFInfo
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- CN111785563B CN111785563B CN202010849113.4A CN202010849113A CN111785563B CN 111785563 B CN111785563 B CN 111785563B CN 202010849113 A CN202010849113 A CN 202010849113A CN 111785563 B CN111785563 B CN 111785563B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
- H01H2033/66269—Details relating to the materials used for screens in vacuum switches
Abstract
The invention discloses a Gao Wenzhu-resistant shielding cylinder for a vacuum arc-extinguishing chamber, which comprises a main shielding cylinder and a coating, wherein the coating comprises the following raw materials in parts by weight: the invention relates to the technical field of vacuum arc-extinguishing chambers, and comprises 10-12 parts of silicon carbide, 8-10 parts of zirconium oxide, 7-9 parts of silicon nitride, 4-6 parts of aluminum oxide, 4-6 parts of magnesium oxide and 10-12 parts of auxiliary agents. According to the Gao Wenzhu shielding cylinder for the vacuum arc-extinguishing chamber and the manufacturing method thereof, materials such as silicon carbide, zirconia, silicon nitride, alumina, magnesia and ceramic micro powder are added in the coating preparation process, so that the high temperature resistance of the main shielding cylinder can be effectively enhanced, meanwhile, the heat conduction performance of graphite powder, copper powder and heat conduction silicone grease is excellent, the risk that the main shielding cylinder is burnt out in the breaking test can be greatly reduced on the basis that the balanced electric field performance of the main shielding cylinder is unchanged, and meanwhile, in the breaking test, metal steam cannot be generated in the shielding cylinder even if an electric arc ablates the inner wall of the shielding cylinder with the ceramic coating.
Description
Technical Field
The invention relates to the technical field of vacuum arc-extinguishing chambers, in particular to a Gao Wenzhu-resistant shielding cylinder for a vacuum arc-extinguishing chamber and a manufacturing method thereof.
Background
The vacuum arc-extinguishing chamber is also called a vacuum switch tube, is a core component of a medium-high voltage power switch, and has the main functions of enabling the medium-high voltage power switch to rapidly extinguish arcs and inhibit currents after the power supply is cut off through excellent insulativity of vacuum in the tube, avoiding accidents and accidents, being mainly applied to power transmission and distribution control systems of electric power, and being also applied to power distribution systems of metallurgy, mines, petroleum, chemical industry, railways, broadcasting, communication, industrial high-frequency heating and the like.
The inner wall of the existing main shielding cylinder is not provided with a protective coating, the high temperature resistance is poor, the heat conduction effect is poor, the surface of the inner wall of the main shielding cylinder is easily burnt out when the vacuum arc-extinguishing chamber is opened, so that the opening failure of the vacuum arc-extinguishing chamber is caused, the opening performance of the arc-extinguishing chamber is influenced, and meanwhile, the oxidation resistance and the electric conduction performance on the main shielding cylinder are still to be further improved.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a Gao Wenzhu shielding cylinder for a vacuum arc-extinguishing chamber and a manufacturing method thereof, which solve the problems that the inner wall of the existing main shielding cylinder is not provided with a protective coating, the high temperature resistance is poor, the heat conduction effect is poor, the surface of the inner wall of the main shielding cylinder is easily burnt out when the vacuum arc-extinguishing chamber is broken, the breaking failure of the vacuum arc-extinguishing chamber is caused, and meanwhile, the oxidation resistance and the electric conduction performance on the main shielding cylinder are still to be further improved.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: according to the Gao Wenzhu shielding cylinder for the vacuum arc-extinguishing chamber, materials such as silicon carbide, zirconia, silicon nitride, aluminum oxide, magnesium oxide and ceramic micro powder are added in the preparation process of a coating, so that the high temperature resistance of the main shielding cylinder can be effectively enhanced, meanwhile, the heat conduction performance of graphite powder, copper powder and heat conduction silicone grease is superior, the risk of burning out the main shielding cylinder in a breaking test can be greatly reduced on the basis that the balanced electric field performance of the main shielding cylinder is unchanged, meanwhile, in the breaking test, metal steam is not generated by the shielding cylinder even if an electric arc ablates to the inner wall of the shielding cylinder with a ceramic coating, the high compactness of the coating is ensured through a defoaming agent and an adhesion promoter, the adhesive force between the coating and the main shielding cylinder is increased, meanwhile, the oxidation resistance and the electric conduction performance of the main shielding cylinder are also improved through the above material components, and the breaking performance of the main shielding cylinder under the same conditions are comprehensively. 10-12 parts of silicon carbide, 8-10 parts of zirconia, 7-9 parts of silicon nitride, 4-6 parts of alumina, 4-6 parts of magnesia, 10-12 parts of auxiliary agent, 8-10 parts of adhesion promoter, 8-10 parts of diatomite, 5-7 parts of defoamer, 12-14 parts of ceramic micropowder, 8-10 parts of copper powder, 6-8 parts of graphite powder, 6-8 parts of heat-conducting silicone grease, 25-35 parts of deionized water and 5-7 parts of antioxidant, wherein the ceramic micropowder is a light nonmetallic multifunctional material, mainly comprises SiO2 and Al2O3, has good dispersibility, high covering power, high whiteness, good suspension property, good chemical stability, good plasticity, high heat-resistant temperature, small density, low loss on ignition, good light scattering property and good insulativity, can improve the adsorptivity, weather resistance, durability, scrubbing resistance, corrosion resistance and high temperature resistance of paint film, improve the mechanical property of paint film, increase transparency, improve the fireproof performance, can be used for anticorrosion, fireproof, high-temperature resistance, powder, building and various industrial and civil light-sensitive paint, is particularly suitable for reducing the yellow pigment and other light-blocking phenomenon of white pigment, and can be used for manufacturing ceramic micropowder in the era, and can be used for preventing flocculation phenomenon of white pigment, and can be used in the white pigment, and the white pigment is a new material.
Preferably, the coating raw materials comprise the following components: 10 parts of silicon carbide, 8 parts of zirconia, 7 parts of silicon nitride, 4 parts of aluminum oxide, 4 parts of magnesium oxide, 10 parts of auxiliary agent, 8 parts of adhesion promoter, 8 parts of diatomite, 5 parts of defoamer, 12 parts of ceramic micro powder, 8 parts of copper powder, 6 parts of graphite powder, 6 parts of heat-conducting silicone grease, 25 parts of deionized water and 5 parts of antioxidant, wherein the aluminum oxide has a chemical formula of Al2O3, is a compound with high hardness, has a melting point of 2054 ℃, has a boiling point of 2980 ℃, and is an ionic crystal capable of ionization at high temperature, and is commonly used for manufacturing refractory materials.
Preferably, the coating raw materials comprise the following components: 11 parts of silicon carbide, 9 parts of zirconia, 8 parts of silicon nitride, 5 parts of aluminum oxide, 5 parts of magnesium oxide, 11 parts of auxiliary agent, 9 parts of adhesion promoter, 9 parts of diatomite, 6 parts of defoamer, 13 parts of ceramic micro powder, 9 parts of copper powder, 7 parts of graphite powder, 7 parts of heat conduction silicone grease, 30 parts of deionized water and 6 parts of antioxidant.
Preferably, the coating raw materials comprise the following components: 12 parts of silicon carbide, 10 parts of zirconia, 9 parts of silicon nitride, 6 parts of aluminum oxide, 6 parts of magnesium oxide, 12 parts of auxiliary agents, 10 parts of adhesion promoters, 10 parts of diatomite, 7 parts of defoamers, 14 parts of ceramic micro powder, 10 parts of copper powder, 8 parts of graphite powder, 8 parts of heat-conducting silicone grease, 35 parts of deionized water and 7 parts of antioxidants.
Preferably, the adhesion promoter is 3-aminopropyl triethoxysilane.
Preferably, the magnesium oxide is an oxide of magnesium, an ionic compound.
The invention also discloses a manufacturing method of the Gao Wenzhu-resistant shielding cylinder for the vacuum arc-extinguishing chamber, which specifically comprises the following steps:
s1, preprocessing work of a main shielding cylinder: after the main shielding cylinder is manufactured, performing sand blasting on the inner wall of the main shielding cylinder to remove burrs on the surface of the inner wall, polishing the inner wall of the main shielding cylinder, and finally blowing off floating and sinking to enable the inner wall of the main shielding cylinder to be kept flat and smooth;
s2, preparing a mixed material A: sequentially placing silicon carbide, zirconia, silicon nitride, alumina, magnesia and an auxiliary agent into a ball mill, stirring for 25-35min at a rotation speed of 200-600rpm, continuously adding diatomite into the ball mill after uniformly mixing, and stirring for 10-15min to obtain a mixed material A for standby;
s3, preparing a mixed material B: sequentially placing ceramic micropowder, copper powder, graphite powder and heat-conducting silicone grease into a high-speed dispersing machine, stirring at a rotating speed of 300-500rpm for 20-30min, heating the internal temperature of the dispersing machine to 120-150 ℃, adding a defoaming agent, and mixing clockwise for 8-10min to obtain a mixed material B, and waiting for standby;
s4, processing and preparing a coating and spraying: putting the mixed materials A and B obtained in the step S2 into a reaction kettle, setting the internal temperature to be 120-150 ℃, mixing and reacting for 20-30min, heating the internal temperature to be 150-180 ℃, adding an antioxidant, deionized water and an adhesion promoter, reacting for 25-35min at the rotating speed of 250-400rpm, preserving heat for 1-1.5h, cooling to normal temperature, uniformly spraying the mixture on the inner wall of a main shielding cylinder by adopting spraying equipment, taking out and airing after the surface of the inner wall of the main shielding cylinder completely covers the coating slurry, and obtaining a coarse product of the high-temperature-resistant main shielding cylinder;
s5, processing a finished product of the Gao Wenzhu-resistant shielding cylinder: and (3) placing the crude product of the Gao Wenzhu shielding cylinder in the S4 in an oven, solidifying for 20-40min at the temperature of 500-550 ℃, and then cooling to room temperature to obtain a finished product of the main shielding cylinder with high temperature resistance.
(III) beneficial effects
The invention provides a Gao Wenzhu shielding cylinder for a vacuum arc-extinguishing chamber and a manufacturing method thereof. The beneficial effects are as follows: the Gao Wenzhu-resistant shielding cylinder for the vacuum arc extinguishing chamber and the manufacturing method thereof are characterized in that the pretreatment work of the main shielding cylinder is carried out by S1: after the main shielding cylinder is manufactured, performing sand blasting on the inner wall of the main shielding cylinder to remove burrs on the surface of the inner wall, polishing the inner wall of the main shielding cylinder, and finally blowing off floating and sinking to enable the inner wall of the main shielding cylinder to be kept flat and smooth; s2, preparing a mixed material A: sequentially placing silicon carbide, zirconia, silicon nitride, alumina, magnesia and an auxiliary agent into a ball mill, stirring for 25-35min at a rotation speed of 200-600rpm, continuously adding diatomite into the ball mill after uniformly mixing, and stirring for 10-15min to obtain a mixed material A for standby; s3, preparing a mixed material B: sequentially placing ceramic micropowder, copper powder, graphite powder and heat-conducting silicone grease into a high-speed dispersing machine, stirring at a rotating speed of 300-500rpm for 20-30min, heating the internal temperature of the dispersing machine to 120-150 ℃, adding a defoaming agent, and mixing clockwise for 8-10min to obtain a mixed material B, and waiting for standby; s4, processing and preparing a coating and spraying: putting the mixed materials A and B obtained in the step S2 into a reaction kettle, setting the internal temperature to be 120-150 ℃, mixing and reacting for 20-30min, heating the internal temperature to be 150-180 ℃, adding an antioxidant, deionized water and an adhesion promoter, reacting for 25-35min at the rotating speed of 250-400rpm, preserving heat for 1-1.5h, cooling to normal temperature, uniformly spraying the mixture on the inner wall of a main shielding cylinder by adopting spraying equipment, taking out and airing after the surface of the inner wall of the main shielding cylinder completely covers the coating slurry, and obtaining a coarse product of the high-temperature-resistant main shielding cylinder; s5, processing a finished product of the Gao Wenzhu-resistant shielding cylinder: the coarse product of the Gao Wenzhu shielding cylinder in the S4 is placed in an oven, solidified for 20-40min at the temperature of 500-550 ℃, then cooled to room temperature, so that a main shielding cylinder finished product with high temperature resistance can be obtained, the high density of the coating is ensured by adding materials such as silicon carbide, zirconia, silicon nitride, alumina, magnesia, ceramic micro powder and the like in the coating preparation process, the high temperature resistance of the main shielding cylinder can be effectively enhanced, meanwhile, the heat conduction performance of graphite powder, copper powder and heat conduction silicone grease is superior, the risk of burning the main shielding cylinder in the breaking test is greatly reduced on the basis that the balanced electric field performance of the main shielding cylinder is unchanged, metal vapor is not generated by the shielding cylinder in the breaking test even if an electric arc ablates the inner wall of the ceramic coating shielding cylinder, the high density of the coating is ensured by the defoamer and the adhesion promoter, meanwhile, the oxidation resistance and the electric conduction performance of the main shielding cylinder are improved by the material components, and the chamber breaking performance of the main shielding cylinder is higher under the same conditions.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a flow chart of the present invention;
FIG. 3 is a statistical chart of experimental data of the present invention;
in the figure: 1-main shielding cylinder and 2-coating.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the embodiments of the present invention provide three technical solutions: a Gao Wenzhu resistant shielding cylinder for a vacuum interrupter, comprising in particular the following embodiments:
example 1
S1, preprocessing work of a main shielding cylinder 1: after the main shielding cylinder 1 is manufactured, performing sand blasting on the inner wall of the main shielding cylinder to remove burrs on the surface of the inner wall, polishing the inner wall of the main shielding cylinder, and finally blowing off floating and sinking to enable the inner wall of the main shielding cylinder 1 to be kept flat and smooth;
s2, preparing a mixed material A: sequentially placing 10 parts of silicon carbide, 8 parts of zirconia, 7 parts of silicon nitride, 4 parts of alumina, 4 parts of magnesia and 10 parts of auxiliary agent into a ball mill, stirring for 25min at a rotating speed of 200rpm, continuously adding 8 parts of diatomite into the ball mill after uniformly mixing, and stirring for 10min again to obtain a mixed material A, and waiting for standby;
s3, preparing a mixed material B: sequentially placing 12 parts of ceramic micro powder, 8 parts of copper powder, 6 parts of graphite powder and 6 parts of heat-conducting silicone grease into a high-speed dispersing machine, stirring for 20min at a rotating speed of 300rpm, heating the internal temperature of the dispersing machine to 120 ℃, adding 5 parts of defoaming agent, and mixing clockwise for 8min to obtain a mixed material B, and waiting for standby;
s4, processing and preparing the coating 2 and spraying: putting the mixed materials A and B obtained in the step S2 into a reaction kettle, setting the internal temperature to 120 ℃, mixing and reacting for 20min, heating the internal temperature to 150 ℃, adding 5 parts of antioxidant, 25 parts of deionized water and 8 parts of adhesion promoter, reacting for 25min at the rotating speed of 250rpm, preserving heat for 1h, cooling to normal temperature, uniformly spraying the mixture on the inner wall of the main shielding cylinder 1 by adopting spraying equipment, taking out and airing after the inner wall surface of the main shielding cylinder 1 completely covers the coating 2 slurry, and obtaining a coarse product of the high-temperature-resistant main shielding cylinder 1;
s5, processing a finished product of the Gao Wenzhu-resistant shielding cylinder 1: and (3) placing the crude product of the Gao Wenzhu resistant shielding cylinder 1 in the S4 in an oven, solidifying for 20min at the temperature of 500 ℃, and then cooling to room temperature to obtain a finished product of the main shielding cylinder 1 with high temperature resistance.
Example two
S1, preprocessing work of a main shielding cylinder 1: after the main shielding cylinder 1 is manufactured, performing sand blasting on the inner wall of the main shielding cylinder to remove burrs on the surface of the inner wall, polishing the inner wall of the main shielding cylinder, and finally blowing off floating and sinking to enable the inner wall of the main shielding cylinder 1 to be kept flat and smooth;
s2, preparing a mixed material A: sequentially placing 11 parts of silicon carbide, 9 parts of zirconia, 8 parts of silicon nitride, 5 parts of alumina, 5 parts of magnesia and 11 parts of auxiliary agent into a ball mill, stirring for 30min at a rotation speed of 400rpm, continuously adding 9 parts of diatomite into the ball mill after uniform mixing, and stirring for 12min to obtain a mixed material A, and waiting for standby;
s3, preparing a mixed material B: sequentially placing 13 parts of ceramic micro powder, 9 parts of copper powder, 7 parts of graphite powder and 7 parts of heat-conducting silicone grease into a high-speed dispersing machine, stirring for 25min at a rotating speed of 400rpm, heating the internal temperature of the dispersing machine to 130 ℃, adding 6 parts of defoaming agent, and mixing clockwise for 9min to obtain a mixed material B, and waiting for standby;
s4, processing and preparing the coating 2 and spraying: putting the mixed materials A and B obtained in the step S2 into a reaction kettle, setting the internal temperature to 130 ℃, mixing and reacting for 25min, heating the internal temperature to 160 ℃, adding 6 parts of antioxidant, 30 parts of deionized water and 9 parts of adhesion promoter, reacting for 30min at the rotating speed of 300rpm, preserving heat for 1.2h, cooling to normal temperature, uniformly spraying the mixture on the inner wall of the main shielding cylinder 1 by adopting spraying equipment, taking out and airing after the slurry of the coating 2 is completely covered on the inner wall surface of the main shielding cylinder 1, and obtaining a coarse product of the high-temperature-resistant main shielding cylinder 1;
s5, processing a finished product of the Gao Wenzhu-resistant shielding cylinder 1: and (3) placing the crude product of the Gao Wenzhu resistant shielding cylinder 1 in the S4 in an oven, solidifying for 30min at the temperature of 520 ℃, and then cooling to room temperature to obtain a finished product of the main shielding cylinder 1 with high temperature resistance.
Example III
S1, preprocessing work of a main shielding cylinder 1: after the main shielding cylinder 1 is manufactured, performing sand blasting on the inner wall of the main shielding cylinder to remove burrs on the surface of the inner wall, polishing the inner wall of the main shielding cylinder, and finally blowing off floating and sinking to enable the inner wall of the main shielding cylinder 1 to be kept flat and smooth;
s2, preparing a mixed material A: sequentially placing 12 parts of silicon carbide, 10 parts of zirconia, 9 parts of silicon nitride, 6 parts of alumina, 6 parts of magnesia and 12 parts of auxiliary agent into a ball mill, stirring at 600rpm for 35min, continuously adding 10 parts of diatomite into the ball mill after uniform mixing, and stirring for 15min to obtain a mixed material A, and waiting for standby;
s3, preparing a mixed material B: sequentially placing 14 parts of ceramic micro powder, 10 parts of copper powder, 8 parts of graphite powder and 8 parts of heat-conducting silicone grease into a high-speed dispersing machine, stirring for 30min at a rotating speed of 500rpm, heating the internal temperature of the dispersing machine to 150 ℃, adding 7 parts of defoaming agent, and mixing clockwise for 10min to obtain a mixed material B, and waiting for standby;
s4, processing and preparing the coating 2 and spraying: putting the mixed materials A and B obtained in the step S2 into a reaction kettle, setting the internal temperature to be 150 ℃, mixing and reacting for 30min, heating the internal temperature to 180 ℃, adding 7 parts of antioxidant, 35 parts of deionized water and 10 parts of adhesion promoter, reacting for 35min at the rotation speed of 400rpm, preserving heat for 1.5h, cooling to normal temperature, uniformly spraying the mixture on the inner wall of the main shielding cylinder 1 by adopting spraying equipment, taking out and airing after the slurry of the coating 2 is completely covered on the inner wall surface of the main shielding cylinder 1, and obtaining a coarse product of the high-temperature-resistant main shielding cylinder 1;
s5, processing a finished product of the Gao Wenzhu-resistant shielding cylinder 1: and (3) placing the crude product of the Gao Wenzhu shielding cylinder 1 in the S4 in an oven, solidifying for 40min at 550 ℃, and then cooling to room temperature to obtain a finished product of the main shielding cylinder 1 with high temperature resistance.
Comparative experiments
The main shield tube manufactured in the embodiment 1, the embodiment 2 and the embodiment 3 and the main shield tube commonly used in the market are simultaneously tested for high temperature resistance, conductivity and oxidation resistance by a certain main shield tube production factory, and are operated under the same time and condition, and in the testing process, statistics data are simultaneously carried out, and a statistics chart is manufactured.
As can be seen from Table 2, the main shielding cylinder processed in example 2 of the present invention can effectively enhance the high temperature resistance of the main shielding cylinder by adding materials such as silicon carbide, zirconium oxide, silicon nitride, aluminum oxide, magnesium oxide, ceramic micro powder and the like in the process of preparing the coating, and meanwhile, the graphite powder, copper powder and heat conduction silicone grease have excellent heat conduction properties, so that the risk of burning the main shielding cylinder in a breaking test is greatly reduced on the basis of unchanged balanced electric field properties of the main shielding cylinder, and metal vapor is not generated by the shielding cylinder even if electric arc is ablated to the inner wall of the ceramic coating shielding cylinder in the breaking test, the high compactness of the coating is ensured by the defoamer and the adhesion promoter, the adhesion between the coating and the main shielding cylinder is increased, and meanwhile, the oxidation resistance and the electric conduction properties of the main shielding cylinder are also improved by the above material components.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A resistant Gao Wenzhu shielding cylinder for a vacuum interrupter, characterized by: the shielding material comprises a main shielding cylinder (1) and a coating (2), wherein the coating (2) comprises the following raw materials in parts by weight: 10-12 parts of silicon carbide, 8-10 parts of zirconium oxide, 7-9 parts of silicon nitride, 4-6 parts of aluminum oxide, 4-6 parts of magnesium oxide, 10-12 parts of auxiliary agent, 8-10 parts of adhesion promoter, 8-10 parts of diatomite, 5-7 parts of defoamer, 12-14 parts of ceramic micropowder, 8-10 parts of copper powder, 6-8 parts of graphite powder, 6-8 parts of heat conduction silicone grease, 25-35 parts of deionized water and 5-7 parts of antioxidant;
the manufacturing method of the main shielding cylinder specifically comprises the following steps:
s1, preprocessing work of a main shielding cylinder (1): after the main shielding cylinder (1) is manufactured, carrying out sand blasting on the inner wall of the main shielding cylinder to remove burrs on the surface of the inner wall, carrying out polishing treatment on the inner wall of the main shielding cylinder, and finally blowing off floating and sinking to enable the inner wall of the main shielding cylinder (1) to be kept flat and smooth;
s2, preparing a mixed material A: sequentially placing silicon carbide, zirconia, silicon nitride, alumina, magnesia and an auxiliary agent into a ball mill, stirring for 25-35min at a rotation speed of 200-600rpm, continuously adding diatomite into the ball mill after uniformly mixing, and stirring for 10-15min to obtain a mixed material A for standby;
s3, preparing a mixed material B: sequentially placing ceramic micropowder, copper powder, graphite powder and heat-conducting silicone grease into a high-speed dispersing machine, stirring at a rotating speed of 300-500rpm for 20-30min, heating the internal temperature of the dispersing machine to 120-150 ℃, adding a defoaming agent, and mixing clockwise for 8-10min to obtain a mixed material B, and waiting for standby;
s4, processing and preparing a coating (2) and spraying: putting the mixed materials A and B obtained in the step S2 and S3 into a reaction kettle, setting the internal temperature to be 120-150 ℃, mixing and reacting for 20-30min, heating the internal temperature to be 150-180 ℃, adding an antioxidant, deionized water and an adhesion promoter, reacting for 25-35min at the rotating speed of 250-400rpm, preserving heat for 1-1.5h, cooling to normal temperature, uniformly spraying the materials on the inner wall of a main shielding cylinder (1) by adopting spraying equipment, taking out and airing after the slurry of a coating (2) is completely covered on the inner wall surface of the main shielding cylinder (1), and obtaining a coarse product of the high-temperature-resistant main shielding cylinder (1);
s5, processing a finished product of the Gao Wenzhu-resistant shielding cylinder (1): and (3) placing the crude product of the Gao Wenzhu resistant shielding cylinder (1) in the S4 in an oven, solidifying for 20-40min at the temperature of 500-550 ℃, and then cooling to room temperature to obtain a finished product of the main shielding cylinder (1) with high temperature resistance.
2. A Gao Wenzhu shield can for a vacuum interrupter as defined in claim 1, wherein: the coating (2) comprises the following raw materials: 10 parts of silicon carbide, 8 parts of zirconia, 7 parts of silicon nitride, 4 parts of aluminum oxide, 4 parts of magnesium oxide, 10 parts of auxiliary agent, 8 parts of adhesion promoter, 8 parts of diatomite, 5 parts of defoamer, 12 parts of ceramic micro powder, 8 parts of copper powder, 6 parts of graphite powder, 6 parts of heat conduction silicone grease, 25 parts of deionized water and 5 parts of antioxidant.
3. A Gao Wenzhu shield can for a vacuum interrupter as defined in claim 1, wherein: the coating (2) comprises the following raw materials: 11 parts of silicon carbide, 9 parts of zirconia, 8 parts of silicon nitride, 5 parts of aluminum oxide, 5 parts of magnesium oxide, 11 parts of auxiliary agent, 9 parts of adhesion promoter, 9 parts of diatomite, 6 parts of defoamer, 13 parts of ceramic micro powder, 9 parts of copper powder, 7 parts of graphite powder, 7 parts of heat conduction silicone grease, 30 parts of deionized water and 6 parts of antioxidant.
4. A Gao Wenzhu shield can for a vacuum interrupter as defined in claim 1, wherein: the coating (2) comprises the following raw materials: 12 parts of silicon carbide, 10 parts of zirconia, 9 parts of silicon nitride, 6 parts of aluminum oxide, 6 parts of magnesium oxide, 12 parts of auxiliary agents, 10 parts of adhesion promoters, 10 parts of diatomite, 7 parts of defoamers, 14 parts of ceramic micro powder, 10 parts of copper powder, 8 parts of graphite powder, 8 parts of heat-conducting silicone grease, 35 parts of deionized water and 7 parts of antioxidants.
5. A Gao Wenzhu shield can for a vacuum interrupter as defined in claim 1, wherein: the adhesion promoter is 3-aminopropyl triethoxysilane.
6. A Gao Wenzhu shield can for a vacuum interrupter as defined in claim 1, wherein: the antioxidant is formed by mixing an antioxidant 1076 and an antioxidant 168 according to a ratio of 1:3.
7. A Gao Wenzhu shield can for a vacuum interrupter as defined in claim 1, wherein: the magnesium oxide is an oxide of magnesium, an ionic compound.
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