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Rotary cantilever porcelain insulator and preparation method thereof

A technology of porcelain insulators and rotating wrist arms, applied in the field of porcelain insulators, can solve the problems of low strength of porcelain blanks, affecting the quality of finished products, and limited installation space for catenary suspension systems, and achieve high strength, ensure stability, and improve density. Effect

Pending Publication Date: 2022-02-15
萍乡市长岭电瓷制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rotary arm porcelain insulators are generally used on electrified railways. With the rapid development of intercity and urban railways, more and more railways are built centered on large cities, forming a complex railway network, especially in multi-network parallel In the railway section, the installation space of the catenary suspension system is very limited, and the rotating wrist arm porcelain insulator is fixedly installed on the catenary to ensure the normal safe insulation distance. Pressure molding, the strength of the molded porcelain blank is not high, which affects the quality of the finished product

Method used

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  • Rotary cantilever porcelain insulator and preparation method thereof

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Embodiment 1

[0021] A method for preparing a rotating wrist-arm porcelain insulator. The raw material of the porcelain body is mixed with an aqueous solution containing polysaccharide, a dispersant is added, and ball milling is performed at 90°C to obtain a slurry. The proportion of the solid phase of the slurry is controlled to be 50wt%. Adjust the pH value of the slurry to 9, add 0.5wt% oxygen inhibitor to the slurry, mix well and inject into the mold, cool down to 30°C to form a porcelain body, and then dry the porcelain body in sequence (dried for 4 hours at a temperature of 35°C and a relative humidity of 95%), firing (in a sintering furnace: heat preservation at 200°C for 1 hour, heat preservation at 450°C for 2 hours, heat preservation at 900°C for 1.5 hours, heat preservation at 1430°C for 2 hours, and heating The speed is 0.5°C / min), and the porcelain sintered body is made with the furnace cooling, and then the porcelain sintered body and metal accessories are assembled to make a p...

Embodiment 2

[0024] A preparation method of a rotary wrist-arm porcelain insulator, mixing the raw material of the porcelain blank with an aqueous solution containing polysaccharide, adding a dispersant, and ball milling at 85°C to obtain a slurry, controlling the solid-containing phase of the slurry to a ratio of 55wt%. Adjust the pH value of the material to 9.2, add an oxygen inhibitor accounting for 0.5wt% of the slurry mass to the slurry, mix it and inject it into the mold, cool it down to 25°C and mold it to make a porcelain body, and then dry the porcelain body in sequence ( Drying for 4 hours at a temperature of 35°C and a relative humidity of 95%, firing (in a sintering furnace: heat preservation at 200°C for 1 hour, heat preservation at 450°C for 2 hours, heat preservation at 900°C for 1.5 hours, heat preservation at 1430°C for 2 hours, heating rate 0.5°C / min), the porcelain sintered body is made with furnace cooling, and then the porcelain sintered body and metal accessories are a...

Embodiment 3

[0027] A preparation method of a rotary wrist-arm porcelain insulator, mixing the raw material of the porcelain blank with an aqueous solution containing polysaccharide, adding a dispersant, and ball milling at 75°C to obtain a slurry, controlling the solid phase of the slurry to a ratio of 58wt%, and the slurry Adjust the pH value of the material to 8.3, add an oxygen inhibitor accounting for 0.5wt% of the slurry quality to the slurry, mix it and inject it into the mold, cool it down to 15°C and mold it to make a porcelain body, and then dry the porcelain body in sequence ( Drying for 4 hours at a temperature of 35°C and a relative humidity of 95%, firing (in a sintering furnace: heat preservation at 200°C for 1 hour, heat preservation at 450°C for 2 hours, heat preservation at 900°C for 1.5 hours, heat preservation at 1430°C for 2 hours, heating rate 0.5°C / min), the porcelain sintered body is made with furnace cooling, and then the porcelain sintered body and metal accessorie...

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Abstract

The invention discloses a preparation method of a rotary cantilever porcelain insulator, and relates to the field of porcelain insulators. The preparation method comprises the following steps: mixing a porcelain billet raw material and a premixed solution containing polysaccharide, adding a dispersant, carrying out ball milling at 70-90 DEG C to obtain slurry, adjusting the pH value of the slurry to 8-10, adding an oxygen inhibitor into the slurry, uniformly mixing, injecting into a mold, cooling to 10-30 DEG C, molding to obtain a porcelain billet, sequentially drying and firing the porcelain billet to obtain a porcelain sintered body, and assembling the porcelain sintered body and a metal accessory to obtain the porcelain insulator. According to the invention, natural polysaccharide gel which can be dissolved at a high temperature is adopted, and can be formed after cooling, and ceramic particles are bonded together to dramatically increase the viscosity of a suspension, so that in-situ solidification forming is achieved, the shape stability after forming is guaranteed, water occupies the positions of pores between the particles before drying, water is discharged in the drying process, and the particles are connected by the residual organic glue so as to ensure the high strength of the billet body.

Description

technical field [0001] The invention relates to the field of porcelain insulators, in particular to a rotating arm porcelain insulator and a preparation method thereof. Background technique [0002] Rotary arm porcelain insulators are generally used on electrified railways. With the rapid development of intercity and urban railways, more and more railways are built centered on large cities, forming a complex railway network, especially in multi-network parallel In the railway section, the installation space of the catenary suspension system is very limited, and the rotating wrist arm porcelain insulator is fixedly installed on the catenary to ensure the normal safe insulation distance. Pressure molding, the strength of the molded porcelain blank is not high, which affects the quality of the finished product. Contents of the invention [0003] The purpose of the present invention is to at least solve one of the technical problems in the prior art, and provide a rotary arm ...

Claims

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Application Information

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IPC IPC(8): H01B19/00H01B17/38
CPCH01B19/00H01B17/38
Inventor 王卫兵
Owner 萍乡市长岭电瓷制造有限公司
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