Anti-icing flashover porcelain insulator and processing method thereof

Abstract

The invention discloses an anti-icing flashover porcelain insulator and a processing method thereof. The icing flashover prevention porcelain insulator comprises a porcelain insulating part, an iron cap and a steel pin, and the inner wall and the outer wall of the porcelain insulating part are coated with porcelain sand; the disc diameter of the porcelain insulating part is 500 mm to 700 mm; according to the formula of the porcelain insulator, low-sodium feldspar is adopted, the use amount of clay is reduced, shrinkage deformation of the porcelain is reduced, alpha-aluminum oxide is calcined at high temperature, the content of corundum phase in porcelain is increased, and then the porcelain strength is improved; according to the processing method of the anti-icing flashover porcelain insulator, the supporting edges are designed under the umbrella skirts during structural design and play a role in supporting the umbrella skirts in the production process, a two-time forming process is adopted during production, the disk diameter of the umbrella skirts of the porcelain insulator is 500-700mm successfully based on the method, the porcelain insulator is applied to an insulator string in a penetrating mode, formation of icicles can be effectively blocked, and the anti-icing flashover porcelain insulator has a good anti-icing flashover effect. Ice flashover of the power transmission line is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission facilities, and in particular to an anti-ice flash porcelain insulator and a processing method thereof. Background Art

[0002] The operation of UHV transmission lines needs to be accompanied by the construction of many supporting power grids of low voltage levels. Transmission lines need to pass through different altitudes and longitudes and latitudes and withstand complex climatic conditions. In transmission lines, suspension insulator strings are needed to suspend the conductors, and tension insulator strings are used to tighten the conductors. The same grade of disc-shaped suspension porcelain insulators or glass insulators need to be used in the same string. At present, the disc diameters of products of the same grade are not much different. After being strung together, the umbrella spacing of the entire string of insulators is small. In the icing season, small icicles are easy to form large icicles between adjacent umbrellas or adjacent products, causing the umbrella tips to bridge and shorten the dry arc distance. In severe cases, ice flash occurs, which has a certain impact on the safe operation of the line.

[0003] The current solution is to insert large-diameter composite umbrella sleeves in the insulator string to prevent the formation of large icicles. However, the composite material is high-temperature vulcanized silicone rubber, which has poor aging resistance and UV resistance. After being exposed to wind and sun for a long time on the line, the composite material will age and lose its original function. Therefore, there is an urgent need for an anti-ice flash insulator that can be used for a long time in power grid construction. Porcelain materials have good aging resistance and can be used for a long time, which meets the requirements of the power grid for anti-ice flash insulator materials. However, the disk diameter of the disk-shaped suspended porcelain insulator is basically controlled below 400mm, which cannot play a role in preventing the formation of icicles. If the disk diameter is increased, it is easy to cause the umbrella skirt to deform during the production process, and the flatness of the umbrella surface cannot meet the standard requirements. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-ice flash porcelain insulator and a processing method thereof, so as to solve the problem that the disk diameter of the current disk-shaped suspension porcelain insulator is basically controlled below 400 mm, which cannot play a role in preventing the formation of icicles. If the disk diameter is further increased, it is easy to cause the shed to deform during the production process and the flatness of the shed surface cannot meet the standard requirements.

[0005] In a first aspect, the present invention provides an ice-flash proof porcelain insulator, comprising: a porcelain insulator, an iron cap and a steel foot, wherein the porcelain insulator comprises a head structure and an integrally formed shed connected to the lower part of the head structure, wherein the head structure is a hollow cylindrical shape; the iron cap is fixed to the head structure by cement adhesive, the steel foot is fixed to the inside of the head structure by cement adhesive, and a gasket is arranged above the steel foot; a ball socket is arranged at the top of the iron cap, a locking pin is arranged inside the ball socket, and porcelain sand is coated on the inner and outer walls of the porcelain insulator; the disc diameter of the porcelain insulator is 500 mm to 700 mm;

[0006] The disk diameter of the porcelain insulating member (1) is 500 mm to 700 mm; the formula of the porcelain insulating member (1) uses the following components in percentage by mass: 28% to 30% of α-alumina, 20% to 25% of low sodium feldspar, and the rest is clay;

[0007] The mass content of Na2O in α-alumina is ≤0.2%, and the true specific gravity is ≥3.95g / cm 3 ; The mass content of Na2O in low sodium feldspar is ≤0.4%, and the mass ratio of K2O and Na2O is K2O:Na2O≥18; the plasticity index of the formula is ≥10, the flexural strength of the dry blank is ≥4.0Mpa, and the strength of the test bar is 175Mpa~185Mpa.

[0008] Furthermore, the expansion coefficient of the porcelain sand is smaller than the expansion coefficient of the porcelain insulating member, and the fineness of the porcelain sand is 16-20 meshes, of which 16-18 meshes account for 85% and 18-20 meshes account for 15%.

[0009] Furthermore, the cement adhesive has a 7-day flexural strength of ≥9 MPa, a 7-day compressive strength of ≥85 MPa, a 7-day dynamic elastic modulus of ≤45 Gpa, and an 11-day shrinkage rate of ≤0.09%.

[0010] Furthermore, 1 to 4 supporting edges are arranged under the umbrella skirt of the porcelain insulation component; the supporting edges are at the same horizontal position, the edge tip arc radius R of the supporting edge is between 8mm and 15mm, and the edge spacing is between 40mm and 60mm; the longitudinal dimension h between the edge of the umbrella skirt and the edge tip of the supporting edge is between 10mm and 60mm, and the transverse dimension d is ≥50mm.

[0011] In a second aspect, the present invention provides a method for processing the above-mentioned anti-ice flash porcelain insulator, comprising:

[0012] The porcelain insulator of the anti-ice flash porcelain insulator adopts a secondary molding process. During the internal molding, the turbine speed is 130r / min-150r / min, and the moisture content of the mud blank is 19%-21%. Then the blank is placed in a gypsum mold. Through the water absorption of gypsum, the blank is dried in the shade to ensure the shape of the shed and uniform moisture content of each part of the blank.

[0013] During external molding, the turbine speed is 240r / min-260r / min, the moisture content of the mud is 17%-18.5%. After external molding, a transfer tray is used to lift the porcelain insulation parts through the supporting edges under the umbrella skirt.

[0014] The present invention has the following beneficial effects: an anti-ice flash porcelain insulator and a processing method thereof of the present invention, the porcelain insulation part has a simple shape, does not need the blank to have high plasticity, the formula of the porcelain insulation part breaks the convention, abandons the use of quartz, adopts low-sodium feldspar, reduces the amount of clay, reduces the shrinkage and deformation of the porcelain part, adopts high-temperature calcination of α-alumina, increases the content of corundum phase in the porcelain, and thus improves the strength of the porcelain. The present invention also provides a processing technology for anti-ice flash porcelain insulators, the product does not need to consider the creepage distance, only the disk diameter needs to be considered, and the supporting ridge is designed under the umbrella skirt during the structural design, which plays a role in supporting the umbrella skirt during the production process. During production, a two-time molding process is adopted, the turbine speed and the moisture content of the mud blank in each process link are strictly controlled, and the blank is placed in a special gypsum mold after the first molding, and the blank is quickly dried in the shade through the water absorption effect of the gypsum, ensuring the shape of the umbrella skirt while ensuring uniform moisture in all parts of the blank. After the second molding, a special transfer tray is used to lift the product through the support edge under the umbrella. Because the support edge height is consistent and the radius of the edge tip arc is large, the force is reasonably distributed and evenly distributed, which can effectively prevent the umbrella skirt from deforming and ensure the quality of umbrella skirt molding. Based on the above method, the umbrella skirt disk diameter of the porcelain insulator of the present invention is successfully made into 500-700mm, and it can be inserted into the insulator string to effectively block the formation of icicles and prevent ice flash from occurring in the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the anti-ice flash porcelain insulator of the present invention;

[0017] Figure 2 This is a schematic diagram of the first molding of the porcelain insulation of the present invention, in which the clay segment is placed in the turbine aluminum mold, and the template knife is properly installed and slowly lowered for cutting and molding;

[0018] Figure 3 This is a cross-sectional view of the porcelain insulation part of the present invention after the first molding, when the green body is placed in a plaster mold for rapid shade drying;

[0019] Figure 4 It is a schematic diagram of the second molding of the porcelain insulator of the present invention, in which the blank is placed on the wheel head, and the upper and lower molding cutters are used to mold the outer part of the shed;

[0020] Figure 5 This is a schematic diagram of the structure of the aluminum transfer pallet used in the production of the present invention;

[0021] Figure 6 It is a cross-sectional view of the porcelain insulating part of the present invention placed on a tray after the second molding;

[0022] Figure 7 It is a schematic diagram of the structure of the porcelain insulating member of the present invention.

[0023] Illustration: 1-porcelain insulator; 2-iron cap; 3-steel foot; 4-cement adhesive; 5-gasket; 6-locking pin; 7-porcelain sand; 100-blank; 200-gypsum mold; 300-aluminum mold. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those generally understood by those of ordinary skill in the art to which the present application belongs.

[0025] See also Figures 1 to 7 The embodiment of the present invention provides an ice-flash proof porcelain insulator, comprising: a porcelain insulator 1, an iron cap 2 and a steel foot 3, the porcelain insulator 1 comprising a head structure and an integrally formed umbrella skirt connected to the lower part of the head structure, the head structure being a hollow cylindrical shape; the iron cap 2 is fixed to the head structure by cement adhesive 4, the steel foot 3 is fixed to the inside of the head structure by cement adhesive 4, a gasket 5 is arranged above the steel foot 3; a ball socket is arranged at the top of the iron cap 2, a locking pin 6 is arranged inside the ball socket, and porcelain sand 7 is coated on the inner and outer walls of the porcelain insulator 1. The disc diameter D of the porcelain insulator 1 is 500mm to 700mm; the following mass percentage components are used in the formula of the porcelain insulator 1: the mass content of Na2O in α-alumina is ≤0.2%, and the true specific gravity is ≥3.95g / cm 3 The mass content of Na2O in the low sodium feldspar is ≤0.4%, and the mass ratio of K2O to Na2O is K2O:Na2O≥18. The plasticity index of the formula is ≥10, the flexural strength of the dry blank is ≥4.0Mpa, and the strength of the test strip is 175Mpa-185Mpa.

[0026] Specifically, the porcelain insulator 1 is produced using an alumina porcelain formula, and is a hollow herringbone structure. The cylindrical head structure is integrated with the large-diameter umbrella skirt below. A layer of porcelain sand 7 is evenly coated on the inner and outer walls of the head structure of the porcelain insulator 1. The expansion coefficient of the porcelain sand must be smaller than the expansion coefficient of the porcelain insulator. The fineness of the porcelain sand is 16-20 mesh, of which 16-18 mesh accounts for about 85%, and 18-20 mesh accounts for about 15%. An appropriate amount of cement adhesive 4 is added to the iron cap 2 and buckled on the head of the porcelain insulator 1. The 4-day flexural strength of the cement adhesive is ≥9Mpa, the 7-day compressive strength is ≥85Mpa, the 7-day dynamic elastic modulus is ≤45Gpa, and the 11-day shrinkage rate is ≤0.09%. Then, the cement adhesive 4 is injected into the middle hole of the porcelain insulator 1, and the steel foot 3 with the gasket 5 attached is vertically erected therein, and the bubbles in the cement adhesive 4 are discharged by mechanical vibration. A ball socket is provided on the top of the iron cap 2 in accordance with the requirements of GB / T 4056 "Ball and socket connection dimensions of insulator string components", in which a locking pin 6 is installed. The locking pin 6 should meet the requirements of GB / T25318 "Locking pin dimensions and tests for ball and socket connections of insulator string components". When two insulators are connected, they are locked by the locking pin 6 to form an insulator string.

[0027] The product of the present invention does not need to consider the creepage distance, but only needs to meet the disc diameter size. Please refer to Figure 1 , three supporting edges are designed under the product umbrella skirt during structural design, so that the supporting edges a, b, and c are on the same horizontal plane, which plays a role in supporting the umbrella skirt during production and is evenly stressed. The unique under-umbrella supporting edge design solves the problem of umbrella deformation during production. The longitudinal dimension h of the large umbrella edge and the edge tip is between 10 and 60 mm, and the transverse dimension d is ≥50 mm, which neither increases the weight of the product umbrella plate too much nor blocks the development of the flashover arc, thereby maximizing the external insulation performance of the product.

[0028] During production, a specially designed alumina ceramic formula is used. High-quality raw materials are selected in strict accordance with the formula ratio. The moisture content of each raw material is measured in advance, and the amount of dry base material added is calculated. All raw materials, water and ball stones are added to the ball mill for ball milling. After reaching the specified fineness and particle grading, the slurry is discharged from the ball mill tank and sieved to remove iron. The slurry with qualified fineness and purity is pumped into the mud press. Secondary squeezing is used to apply a certain pressure to filter out the moisture in the mud from the filter cloth to obtain a usable mud cake; then the mud cake is put into the roughing mill to be fully crushed to discharge excess gas, while making the moisture content of the mud more uniform, and squeezing out mud segments of set specifications; the mud segments are sent to a constant The clay is aged in an aging warehouse with high temperature and humidity for 24 hours to make the moisture content in the clay material tend to be consistent. The organic matter brought in by the clay raw material can also undergo biochemical reactions during the aging period and be transformed into colloidal substances, which increases the humic acid substances in the clay material and improves the plasticity of the clay material. The moisture content of the clay segment after aging is between 19.5% and 21.5%. It is put into a vacuum clay kneading machine, and the clay is vacuumed while kneading. Then, clay segments that can be used for molding are extruded. The air volume in the vacuum kneaded clay segment will be reduced to 0.5% to 1%, and the composition and moisture content of the clay blank tend to be uniform, so that the plasticity, bonding and dry blank strength of the clay material can be greatly improved.

[0029] According to the shrinkage ratio of the mud under different water content, the umbrella shape of the first molding is designed. Only the internal umbrella shape is molded for the first time. The moisture content of the mud blank is between 19% and 21%. A sufficient amount of mud segments squeezed by vacuum mud kneading are placed in the turbine aluminum mold. The turbine aluminum mold is a detachable component, which can make the same turbine meet the production of different types of products. A layer of filter cloth is embedded in the aluminum mold 300 to prevent the mud from sticking to the aluminum mold. The turbine drives the mud blank in the aluminum mold to rotate continuously. It is more appropriate to control the turbine speed to 130-150r / min to prevent cutting too fast and reduce the molding quality of the blank. During the rotation, the pre-designed molding tool is slowly pressed down, such as Figure 2 As shown, the excess mud is cut away and the internal umbrella shape of the porcelain insulator is cut and formed.

[0030] A special plaster mold is designed, and the green body 100 after the umbrella-shaped interior is formed is placed in the plaster mold 200 for rapid shade drying, so as to ensure the shape of the umbrella skirt and make the green body moisture uniform. Figure 3 After the blank is dried in the shade, when the moisture content of the clay blank drops to 17%-18.5%, the blank that has been formed for the first time is turned upside down on the wheel head to form an external umbrella shape, as shown in the figure. Figure 4As shown, the wheel head is a detachable component that allows the same turbine to meet the production of different types of products. It is made of gypsum and is pre-turned into a matching shape according to the internal shape of the porcelain insulator to ensure that the internal umbrella surface is not worn when the blank formed for the first time is turned upside down. At the same time, it can also provide a certain friction force to drive the blank to rotate with the main shaft of the turbine below. The turbine speed is more suitable at 240-260r / min.

[0031] The formed blanks are then placed on a special transfer tray, such as Figure 6 As shown, the product is lifted up by the supporting edge under the umbrella. Because the supporting edge has the same height and the radius of the tip of the edge is large, the force is reasonably distributed and evenly applied, which can effectively prevent the umbrella skirt from deforming. It is placed in the air for 5-10 hours. When the moisture content drops below 15%, it is sent to the tunnel drying room for drying to reduce the moisture content of the green body so that it has a certain mechanical strength. There are two processes in the drying of the green body: the process in which the moisture on the surface of the green body diffuses from the surface to the surrounding medium in the form of steam is called the external diffusion process; when the surface moisture evaporates, a humidity gradient is formed between the inside and outside of the green body, and the process in which the water inside the green body migrates to the surface is called the internal diffusion process. When the moisture content of the green body drops to 1%-1.5%, the drying is completed.

[0032] The dried blank has a certain mechanical strength. In order to improve the head strength, a layer of reinforcing glaze should be dipped on the inner and outer walls of the dry blank head of the porcelain insulator. The optimal thickness is 0.25-0.45mm. The expansion coefficient of the reinforcing glaze is much smaller than that of the blank and porcelain sand. It prefabricates a layer of compressive stress for the head of the insulating part, inhibits the expansion of microcracks, and improves the strength of the product.

[0033] Afterwards, wipe the umbrella skirt of the blank with water to make the surface moist, which is conducive to the subsequent immersion of the umbrella plate glaze. The corresponding glaze color is applied to the umbrella skirt according to customer requirements. Then the inner and outer walls of the porcelain are sanded by the automatic sanding machine. The sanding process is divided into inner wall sanding and outer wall sanding. The inner wall is sanded when the blank is transferred from the glazing machine and falls on the synchronous belt of the sanding machine. It first passes through the head height detection device and then moves to the inner wall glue spraying station of the blank. The grabbing mechanism above the head of the blank falls down, clamps the outer circle of the head of the blank, lifts the blank, and at the same time, the glue spraying hose at the bottom of the blank is lifted and extended to the inner eye position, and the glue sprayed is evenly distributed on the inner wall of the inner eye. Then move to the inner eye sandblasting station, and the sand particles sprayed by the nozzle are evenly adhered to the inner wall surface. For sanding the outer wall, the glue transfer method is first used to apply glue to the outer wall, that is, a sponge roller full of glue is rotated on the head of the blank, and the glue used for glue spraying is transferred from the sponge to the head of the blank. After that, the blank is transferred to the head sandblasting station to complete the sandblasting operation. The fineness of the porcelain sand is 16-20 mesh, and the expansion coefficient is between the blank and the reinforcing glaze, which provides sufficient friction between the adhesive and the insulating part, so that it has the mechanical strength that meets the product standard requirements. Finally, the blank is put into the kiln and fired into a porcelain insulating part, such as Figure 7As shown, after taking out of the kiln, just glue the iron cap and steel foot together.

[0034] The biggest difference between the present invention and the prior art is the porcelain insulation. The porcelain insulation formula uses 28% to 30% high-temperature calcined α-alumina to replace low-cost bauxite. The Na2O content in the alumina is ≤0.2%, and the true specific gravity is ≥3.95g / cm 3 , indirectly control the conversion rate of alumina with true specific gravity, and reduce the unstable β and γ phases; use low sodium feldspar with a content of 20% to 25%, the Na2O content in low sodium feldspar is ≤0.4%, K2O:Na2O≥18, the Na2O content of feldspar in traditional formula is about 2%, because the Na2O content is high, the cooling effect is obvious, and the general dosage will not exceed 20%; the rest is clay, and quartz is not used. Quartz is an indispensable skeleton raw material in traditional porcelain formulas. There is no quartz in the formula, which prevents cracks caused by the crystal transformation of large quartz particles during the cooling process and ensures the quality of porcelain. The proportion of barren materials in the formula is relatively high, and the Na2O content in the raw materials is strictly controlled, so that the body has strong drainage, reduced plasticity, and improved firing quality. Plasticity is an important performance of the formula, that is, after a certain amount of water is added to the formula, it can be kneaded into the required shape, and when the external force is removed, it can still maintain the shape. Plasticity is generally measured by the plasticity index, which indicates the range between the upper and lower limits of moisture content when the blank is in a plastic state, that is, the range of moisture that can be formed, specifically expressed by the difference between the liquid limit moisture content and the plastic limit moisture content. The plasticity index of this formula is ≥10, the dry blank flexural strength is ≥4.0Mpa, and the test bar strength is 175~185Mpa.

[0035] The shed of porcelain insulator has a unique shape. At present, the shed of conventional suspended porcelain insulators is in the shape of three-shed, double-shed, straw hat and bell. Affected by the formula performance and production process, the disc diameter is basically controlled below 400mm. If the disc diameter increases, it is easy to cause the shed to deform. The insulator described in the present invention does not need to consider the creepage distance, but only the disc diameter. During the structural design, three supporting ridges are designed under the umbrella, so that points a, b and c are in the same horizontal plane, which plays a role in supporting the shed during the production process. The disc diameter can be 500-700mm. It can be inserted into the insulator string to effectively block the formation of icicles and prevent ice flash from occurring in the transmission line. During production, a secondary molding process is used instead of a conventional one-time molding process. The turbine speed and the moisture content of the mud blank in each process link are strictly controlled. After the first molding, the blank is quickly dried in the shade using a gypsum mold to ensure the shape of the shed while making the moisture content of the blank uniform, thereby ensuring the molding quality of the shed. After external molding, a special transfer tray is used for transportation, matching the support ridge design, to ensure the quality of the shed.

[0036] The present invention provides an anti-ice-flash suspension porcelain insulator that can be used stably for a long time for power grid construction. The ultra-large disk diameter can effectively block the formation of icicles, prevent ice flash from occurring in the line, and ensure the safe operation of the transmission line. In the future development of electricity, it will have a broad market space.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-ice flash porcelain insulator, characterized in that: include: A porcelain insulator (1), an iron cap (2) and a steel foot (3), wherein the porcelain insulator (1) comprises a head structure and an integrally formed shed connected to the lower part of the head structure, wherein the head structure is a hollow cylindrical shape; the iron cap (2) is fixed to the head structure by means of a cement adhesive (4), the steel foot (3) is fixed to the inside of the head structure by means of a cement adhesive (4), a gasket (5) is arranged above the steel foot (3); a ball socket is arranged at the top of the iron cap (2), a locking pin (6) is arranged inside the ball socket, and the inner and outer walls of the porcelain insulator (1) are coated with porcelain sand (7); The disk diameter of the porcelain insulating member (1) is 500 mm to 700 mm; the formula of the porcelain insulating member (1) uses the following components in percentage by mass: 28% to 30% of α-alumina, 20% to 25% of low sodium feldspar, and the rest is clay; The mass content of Na2O in α-alumina is ≤0.2%, and the true specific gravity is ≥3.95g / cm 3 ; The mass content of Na2O in low sodium feldspar is ≤0.4%, and the mass ratio of K2O and Na2O is K2O:Na2O≥18; the plasticity index of the formula is ≥10, the flexural strength of the dry blank is ≥4.0Mpa, and the strength of the test bar is 175Mpa~185Mpa.

2. The anti-ice flash porcelain insulator according to claim 1, characterized in that: The expansion coefficient of the porcelain sand (7) is smaller than the expansion coefficient of the porcelain insulating member (1), and the fineness of the porcelain sand is 16-20 meshes, of which 16-18 meshes account for 85% and 18-20 meshes account for 15%.

3. The anti-ice flash porcelain insulator according to claim 1, characterized in that: The cement adhesive (4) has a 7-day flexural strength of ≥9Mpa, a 7-day compressive strength of ≥85Mpa, a 7-day dynamic elastic modulus of ≤45Gpa, and an 11-day shrinkage rate of ≤0.09%.

4. The anti-ice flash porcelain insulator according to claim 1, characterized in that: One to four supporting edges are arranged under the umbrella skirt of the porcelain insulating member (1); the supporting edges are at the same horizontal position, the radius R of the edge tip of the supporting edge is between 8 mm and 15 mm, and the edge spacing is between 40 mm and 60 mm; the longitudinal dimension h between the edge of the umbrella skirt and the edge tip of the supporting edge is between 10 mm and 60 mm, and the transverse dimension d is ≥50 mm.

5. A method for processing an anti-ice flash porcelain insulator according to claim 1, characterized in that: include: The porcelain insulator of the anti-ice flash porcelain insulator adopts a secondary molding process. During the internal molding, the turbine speed is 130r / min-150r / min, and the moisture content of the mud blank is 19%-21%. Then the blank is placed in a gypsum mold. Through the water absorption of gypsum, the blank is dried in the shade to ensure the shape of the shed and uniform moisture content of each part of the blank. During external molding, the turbine speed is 240r / min-260r / min, the moisture content of the mud is 17%-18.5%. After external molding, a transfer tray is used to lift the porcelain insulation parts through the supporting edges under the umbrella skirt.

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