A light-weight and high-strength column-type porcelain insulator

Abstract

The invention discloses a light and high-strength column-type porcelain insulator. The light and high-strength column-type porcelain insulator comprises an insulator body, an upper steel cap and a lower steel cap, wherein the upper steel cap and the lower steel cap are respectively glued and connected with two ends of the insulator body by an adhesive layer, a reinforcement rack is arranged in theadhesive layer, and the insulator body mainly comprises 20-40wt% of calcined aluminum bauxite, 20-40wt% of Shaanxi clay, 8-25wt% of Pingxiang south village porcelain clay, 2-5wt% of Fujian porcelainclay, 10-20wt% of feldspar, 1-3wt% of peat soil and 1-3wt% of multi-component accelerant formed from JS-silicon-aluminum. The light and high-strength column-type porcelain insulator is prepared by uniformly mixing and ball-milling the main raw materials, adding the peat soil and the multi-component accelerant for ball-milling and mixing, and performing vacuum pugging, profile blank formation, glazing, sanding and high-temperature baking. The light and high-strength column-type porcelain insulator is high in mechanical strength, excellent in electrical performance, high in mechanical impact-resistant capability and high in pollution-resistant capability, and the requirement of the porcelain insulator for an electrical contact network can be completely met.

Description

technical field [0001] The invention relates to a porcelain insulator, in particular to a light-weight, high-strength pillar-type porcelain insulator. Background technique [0002] With the continuous development of my country's economy, the amount of rod-shaped porcelain insulators used in electrified catenary is increasing. Due to the frequent occurrence of air pollution and line pollution flashover, the requirements for the electrical performance and mechanical performance of rod-shaped porcelain insulators are getting higher and higher. It is higher and higher, among which the porcelain strength level of rod-shaped porcelain insulators is required to be above 160KN, and the tensile strength is required to be 160-180Mpa. According to estimates, by 2020, the consumption of rod-shaped porcelain insulators in my country will reach 6 million. Most of the existing rod-shaped porcelain insulator bodies are made of high-alumina porcelain, and most of them are made of bauxite, ka...

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Problems solved by technology

Most of the existing rod-shaped porcelain insulator bodies are made of high-alumina porcelain, and most of them are made of bauxite, kaolin and feldspar as the main raw materials and prepared at high temperature in a reducing atmosphere, although the phase group in the structure is corundum and mullite. Mainly, but the distribution of crystallites in the phase group is not uniform, the grains are coarse, the sizes are different, and the content of pores and glass phases is also large. Therefore, the strength level of the bulk porcelain is generally only 80-120 MPa, and the best is only 130- 150 MPa, the insulator body has low mechanical strength and heavy weight, which cannot meet the technical requirements for the use of electrified catenary; the tensile strength of existing rod insulator products is low, and another reason is that the porcelain insulator body and mounting seat (steel Caps and diamond feet) are generally connected and fixed by conventional cement glue. The ability of the connecting body to resist mechanical damage is poor. In addition, due to external reasons such as the increase in vibration force brought about by the high speed of the railway, the connection between the porcelain insulator body and the mounting seat is easy. Damage, low strength against mechanical damage may cause failure of AC electrified conductive contact wire support system, thereby reducing reliability and safety

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