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Ceramic valve plate for double gate valve

A technology of ceramic valves and double gates, which is applied in the field of valve plates, can solve problems such as poor wear resistance, seal failure, and corrosion resistance, and achieve the effects of broadening applications, increasing service temperature, and increasing service life

Inactive Publication Date: 2007-09-05
宜兴市法兰特工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Double-gate valves are mainly used in medium transmission pipelines with severe wear resistance in industries such as water and coal ash treatment systems in power plants. The core valve plate material is usually made of 45# quenching or electroplating chromium, which has low hardness and poor wear resistance. , Not resistant to corrosion and other shortcomings. In addition, metal materials are deformed due to thermal expansion and contraction at high temperatures, resulting in seal failure, and high temperature resistance needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, the ceramic valve plate that double gate valve is used, by 95 parts of Al 2 o 3 Powder (≤3μm Al 2 o 3 ≥99.9%), 1.5 Cr 2 o 3 (Reagent grade), 0.35 parts of CoO (reagent grade), 3.15 parts of silica powder are molded and fired at about 1730°C.

Embodiment 2

[0021] Embodiment 2, the ceramic valve plate that double gate valve is used, is made of 94 parts of Al 2 o 3 Powder (≤3μm Al 2 o 3 ≥99.9%), 3 parts ZrO 2 Powder (≤1.5μm ZrO 2 ≥99%), 1.5 Cr 2 o 3 (Reagent grade), 0.3 parts of CoO (reagent grade), 0.7 parts of silica powder, 0.5 parts of calcium carbonate are molded and fired at about 1730°C.

Embodiment 3

[0022] Embodiment 3, the ceramic valve plate that double gate valve is used, by 92 parts of Al 2 o 3 Powder (≤3μm Al 2 o 3 ≥99.9%), 4 parts ZrO 2 Powder (≤1.5μm ZrO 2 ≥99%), 1.5 Cr 2 o 3 (Reagent grade), 0.5 parts of CoO (reagent grade), 1.15 parts of talc, 0.85 parts of calcium carbonate are molded and fired at about 1730°C.

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PUM

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Abstract

The invention provides a ceramic valve plate for double gate valve, wherein the valve plate is prepared from aluminium oxide powder as main body, as well as added chromium, cobalt and zirconium oxides, the ceramics prepared thereby possesses better compatibility, high hardness, toughness, high temperature variation property, increased operation life and raised operation temperature.

Description

technical field [0001] The invention relates to a valve plate, in particular to a special ceramic valve plate applied to a double gate valve. technical background [0002] Double-gate valves are mainly used in medium transmission pipelines with severe wear resistance in industries such as water and coal ash treatment systems in power plants. The core valve plate material is usually made of 45# quenching or electroplating chromium, which has low hardness and poor wear resistance. , Not resistant to corrosion and other shortcomings. In addition, metal materials are deformed due to thermal expansion and contraction at high temperatures, resulting in sealing failure, and the high temperature resistance performance needs to be improved. Contents of the invention [0003] The present invention aims to overcome the above-mentioned disadvantages, and provides a wear-resistant, corrosion-resistant valve plate suitable for high temperature use, especially for double gate valves. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/117C04B35/119C04B35/64
Inventor 黄伯强
Owner 宜兴市法兰特工贸有限公司