Hemispherical metal sealing fixed ball valve with jacket

Abstract

The invention discloses a hemispherical metal sealing fixed ball valve with a jacket, belongs to the technical field of ball valves, and aims to solve the technical problems that in the prior art impurities in a fluid and crystals of the fluid damage a sealing pair and shorten the service life of a valve. A valve core is arranged in a valve body; a valve rod arranged at the upper part of the valvebody drives the valve core to rotate by taking a pivot arranged at the lower part of the valve body as an axis to realize opening and closing of the valve; the valve core is hemispherical; the spherical surface of the valve core is matched with a valve seat to form a seal after the valve is closed; and the aspheric surface side of the valve core and the valve body form a cavity; the valve seat isarranged in a valve cover; a cylindrical spring is arranged between the valve seat and the valve cover; the valve cover is connected with the valve body; the jacket is arranged on the outer side of the valve body; and a heat conducting medium flows into the jacket from an inlet end arranged on the jacket and flows out of the jacket from an outlet end arranged on the jacket. According to the hemispherical metal sealing fixed ball valve with the jacket, the operating environment of the valve is improved, the abrasion of impurities in the fluid and crystals of the fluid to the sealing pair of the valve is avoided, and the service life of the valve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of ball valves, in particular to a hemispherical metal-sealed fixed ball valve with a jacket. Background technique [0002] Ball valves are widely used in various fields such as petroleum, chemical industry, steel, metallurgy and electric power. Ball valves have the advantages of small medium resistance and convenient operation. However, in the case of conveying materials that are easy to crystallize, such as urea, etc., or viscous fluids, such as oil with high waxy and asphalt content, due to the precipitation and crystallization of materials, deposits will be generated on the sealing surface, resulting in valves Seal failure. There will inevitably be some impurities in the fluid. During the opening and closing process of the traditional spherical valve core, the impurities in the fluid are easily substituted into the valve core cavity, which will cause wear to the sealing pair of the valve over time, redu...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a hemispherical metal-sealed fixed ball valve with a jacket, so as to solve the technical problem in the prior art that the impurities in the fluid and the crystals of the fluid cause damage to the sealing pair and reduce the service life of the valve.

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