Glaze-coated sand method of electrified railway contact net rod-shaped porcelain insulator

A technology for electrified railways and porcelain insulators, applied in the direction of inorganic insulators, circuits, insulators, etc., can solve the problems of compressive stress formed by porcelain blanks, sand particles peeling off porcelain blanks, and insufficient bonding, etc., to achieve enhanced bending resistance and improved The effect of mechanical properties

Active Publication Date: 2011-11-23
JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages in the glazing and sanding process commonly used in China.
This is because the sand grains themselves are irregular in shape, and the glaze is applied after the sand grains adhere to the porcelain body. There is a place where the sand and the porcelain body are not in complete contact, forming a dead angle, and the glaze may not be able to invade this part. Therefore, sand, glaze and porcelain The bond between blanks is not very sufficient
[0003] Not only that, in the traditional process, sand and porcelain body often adopt similar formula, the expansion coefficient of sand is greater than or equal to the expansion coefficient of porcelain body, and the compressive stress cannot be formed on the porcelain body, if the temperature change exceeds the tensile strength of the porcelain body If it is, it will cause the sand particles to peel off the porcelain body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a method for wrapping glazed sand of rod-shaped porcelain insulators of electrified railway catenary, the method comprises the following steps:

[0018] 1) Preparation of porcelain sand: first prepare mud according to the following formula, pass the mud through a mud press to obtain a mud cake, then extrude the mud cake into a mud bar through a mud mill, and then the mud bar is dried, crushed, granulated, Sieve to obtain raw sand with the desired particle size, then fire the raw sand at high temperature to obtain cooked sand, and finally crush and sieve the cooked sand to obtain porcelain sand;

[0019] Wherein the formula of said mud is: the weight ratio of solid raw material and water is 35:65, and described solid raw material comprises the composition of following percentage by weight: Qing Caoling 27%, bauxite powder 21%, feldspar powder 11%, boiled talc powder 6%, quartz 15%, lime clay 20%; the above ingredients are all commercially available products...

Embodiment 2

[0025] Embodiment 2: a method for wrapping glazed sand on rod-shaped porcelain insulators of electrified railway catenary, the method comprises the following steps:

[0026] 1) Preparation of porcelain sand: first prepare mud according to the following formula, pass the mud through a mud press to obtain a mud cake, then extrude the mud cake into a mud bar through a mud mill, and then the mud bar is dried, crushed, granulated, Sieve to obtain raw sand with the desired particle size, then fire the raw sand at high temperature to obtain cooked sand, and finally crush and sieve the cooked sand to obtain porcelain sand;

[0027] Wherein the formula of said mud is: the weight ratio of solid raw material and water is 35:65, and described solid raw material comprises the composition of following percentage by weight: Qing Caoling 25%, bauxite powder 20, feldspar powder 10%, boiled talcum powder 7% %, quartz 16%, lime clay 22%;

[0028] The preparation method of mud: mix solid raw mat...

Embodiment 3

[0032] Embodiment 3: a method for wrapping glazed sand on rod-shaped porcelain insulators of electrified railway catenary, the method comprises the following steps:

[0033] 1) Preparation of porcelain sand: first prepare mud according to the following formula, pass the mud through a mud press to obtain a mud cake, then extrude the mud cake into a mud bar through a mud mill, and then the mud bar is dried, crushed, granulated, Sieve to obtain raw sand with the desired particle size, then fire the raw sand at high temperature to obtain cooked sand, and finally crush and sieve the cooked sand to obtain porcelain sand;

[0034] Wherein the formula of said mud is: the weight ratio of solid raw material and water is 35:65, and described solid raw material comprises the composition of following percentage by weight: Qing Caoling 28%, bauxite powder 23%, feldspar powder 12%, cooked talcum powder 5%, quartz 14%, gray clay 18%;

[0035] The preparation method of mud: mix solid raw mate...

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Abstract

The invention discloses a glaze-coated sand method of an electrified railway contact net rod-shaped porcelain insulator. The method comprises the following steps of: firstly, manufacturing porcelain sand with required granularity, then coating glaze, naturally shade drying the glaze-coated porcelain sand and sieving the sand with a sieve set, wherein the sand in the sieve set is the qualified glaze-coated sand; and uniformly coating a layer of bonding agent in a sanding control line on a glaze-coated blank, and uniformly spreading the glaze-coated sand, wherein sand lacking or sand stacking is required to be avoided. The method has the advantages that: by the method, the mechanical property of porcelain surface and cemented parts is greatly improved; bending resistance and tensile strength of the product are enhanced; the sand, the glaze and the porcelain blank are fully bonded, and the sand grains are difficult to be stripped from the porcelain blank; and the sands of the sintered product are fixedly bonded on the porcelain blank by the molten glaze layer, and a dead corner problem is avoided.

Description

technical field [0001] The invention relates to a glaze-sand coating method for porcelain insulators, in particular to a glaze-sand coating method for rod-shaped porcelain insulators of electrified railway contact nets. Background technique [0002] In the production process of rod-shaped porcelain insulators, in addition to the structural strength of the porcelain part itself affecting the bending strength of the product, the quality of the glue between the porcelain part and the accessories also directly affects the mechanical properties of the product. In the parts where the porcelain parts need to be glued, the porcelain parts are first glazed. The purpose of glazing is not only to make the surface of the product beautiful and stain-resistant, but also to effectively improve the surface properties of the porcelain parts and prevent micro-cracks on the surface of the porcelain parts. diffusion to enhance the mechanical properties of porcelain parts; after glazing, in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/00H01B3/08
Inventor 刘少华
Owner JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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