High-pressure high-temperature ceramic adjusting ball valve

Abstract

The invention discloses a high-pressure high-temperature ceramic adjusting ball valve which is reliable in sealing, resistant to high pressure and high temperature, resistant to corrosion and capable of automatically adjusting sealing performance to certain extent. The adjusting ball valve comprises a left flange (1) and a right flange (20), a valve body (6) and a valve body liner (5) are arranged between the left flange (1) and the right flange (20), and the left flange (1) and the right flange (20) are fastened by a bolt (16) and a nut (17). The adjusting ball valve is characterized in that a left valve seat (2) made of ceramic is arranged in the left flange (1), a right valve seat (19) made of ceramic is arranged in the right flange (20), a ball (3) made of a ceramic material, playing a role in opening or closing a passage and provided with a V-shaped groove is disposed between the left valve seat (2) and the right valve seat (19), and connected with a valve rod (9) and an output shaft (10), the valve body liner (5) is made of a ceramic material, and a tenon-shaped sealing structure is formed between the valve body liner (5) and the left and right valve seats (2,19).

Description

Technical field: [0001] The invention relates to a regulating valve applicable to multiple fields, in particular to a novel ceramic regulating ball valve. Background technique: [0002] Regulating valve is a kind of valve widely used. It has good sealing, on-off and anti-blocking performance. It can make the flow path the simplest in use, can be adjusted without resistance and has the largest KV value. It also has good self-cleaning performance, It has many characteristics of simple and fast opening and closing and strong ability to overcome pressure difference. However, with the development of industrial technology, in petrochemical or various special application fields, the situation of the fluid in the pipeline is becoming more and more complicated, and the fluid contains various impurities. Or the transportation process involves environmental conditions such as high temperature, high pressure and high-speed flow, so the existing regulating valves are difficult to adapt t...

AI Technical Summary

Problems solved by technology

[0002] Regulating valve is a kind of valve widely used. It has good sealing, on-off and anti-blocking performance. It can make the flow path the simplest in use, can be adjusted without resistance and has the largest KV value. It also has good self-cleaning performance, It has many characteristics of simple and fast opening and closing and strong ability to overcome pressure difference. However, with the development of industrial technology, in petrochemical or various special application fields, the situation of the fluid in the pipeline is becoming more and more complicated, and the fluid contains various impurities. Or the transportation process involves environmental conditions such as high temperature, high pressure and high-speed flow, so the existing regulating valves are difficult to adapt to, and eventually the service life of the regulating valve will be reduced, liquid leakage will occur, and the operation stability of the entire system will be reduced, especially in automatic The above problems are particularly prominent when the control operation requirements are getting higher and higher

The method currently adopted in the prior art is mainly to use cemented carbide ball core valve seats or spray-coated cemented carbide sealing pairs for regulating valves. Since cemented carbide materials contain metal binders, diamond wheels cannot be used for processing, only It is processed by corundum grinding wheel, so the hardness of the processed cemented carbide products does not exceed HRC70. When the inorganic non-metallic salt with high hardness is transported in the pipeline, the wear of the regulating valve will be quite serious. At the same time, the cemented carbide valve Because the sealing pair is made of the same material, the friction coefficient is very large, so the regulating valve generally has problems such as large torque, non-corrosion resistance of the sealing pair, and easy leakage. In general, it is very urgent to solve the wear resistance of the existing regulating valve. The problem

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