Novel adjustable throttle valve

Abstract

The invention discloses a novel adjustable throttle valve. The novel adjustable throttle valve comprises a valve body, a valve element, a bonnet, an adjustment hand wheel, an opening degree display sleeve and a valve seat. The valve body is internally provided with a fluid inlet, a fluid outlet and a valve element cavity. The valve element cavity communicates with the fluid inlet and the fluid outlet through a runner. One end of the valve element is arranged in the valve element cavity in an inserted manner, and the other end of the valve element is arranged in the bonnet in an inserted mannerand in coaxial connection with the adjustment hand wheel. The bonnet is fixedly connected with the valve body. The opening degree display sleeve is arranged between the bonnet and the adjustment handwheel. The valve seat is arranged in the valve element cavity. The valve seat is internally provided a truncated-cone-shaped cavity. The truncated-cone-shaped cavity and the valve element are arranged in a coaxial manner, and the area of the upper bottom face of the truncated-cone-shaped cavity is bigger than that of the lower bottom face of the truncated-cone-shaped cavity. The size of the truncated-cone-shaped cavity is matched with the end, arranged in the valve element cavity in an inserted manner, of the valve element. According to the novel adjustable throttle valve, the shock resistance and corrosion resistance of the structure adopted are great; the service life is prolonged remarkably; and the structure is simple, and machining difficulty degree is low.

Description

technical field [0001] The invention relates to the technical field of mechanical valves, in particular to a novel adjustable throttle valve. Background technique [0002] A throttle valve is a valve that controls fluid flow by changing the throttle section or throttle length. Adjustable throttle valves are widely used in various fluid operations in oil fields, mainly used for fluid flow regulation or pressure regulation, especially the regulation of high pressure and large flow fluids, which are indispensable in drilling, testing and downhole operations fluid control components. [0003] At present, most of the throttle valve wear is due to the failure of the valve core. The valve core is the most critical part of the adjustable throttle valve. It is usually welded by a cone made of carbide and a rod made of stainless steel. However, the current The valve core made by the commonly used method, the welding joints of the cone and the rod body are exposed, and it is inevitab...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the throttle valve wear is due to the failure of the valve core. The valve core is the most critical part of the adjustable throttle valve. It is usually welded by a cone made of carbide and a rod made of stainless steel. However, the current The valve core made by the commonly used method, the welding joints of the cone and the rod body are exposed, and it is inevitable to be in contact with the fluid during use. Under the long-term sandy high-pressure fluid washing, the welding joints are often washed away, thus making the cone The body and the rod body are detached and lose the regulating effect on the fluid, resulting in serious accidents

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