High-temperature high-pressure difference pressure-reducing valve

Abstract

The invention relates to a high temperature high pressure difference reducing valve, which is characterized in that the reducing valve comprises a valve body, a valve seat, and a valve core which is positioned in the valve seat and can move up and down in the valve seat; the valve core is fixedly connected with a valve rod by a thread and a pin; the valve rod is positioned in the valve body, sealed from the outside world by sealing packing and a packing gland, and can move up and down; the lower part of the valve seat is provided with a bush, a throttle orifice and a flange which is connectedwith the outer part; and a medium enters into a valve cavity from the side direction, and flows out from the tail end after flowing through a channel composed of the valve core and the valve seat, and the throttle orifice at the downstream of the valve seat,. Compared with the prior art, the high temperature high pressure difference reducing valve can reduce the pressure of materials with high temperature and high solid content, controls the pressure of systems and the liquid position of high-pressure tanks, not only can reduce the pressure and generate required large pressure reduction but also can carry out appropriate flow control; more importantly, the high temperature high pressure difference reducing valve can prevent harsh erosive wear formed by the high-speed flow of medium flow with high solid content under large pressure difference to the materials.

Description

Technical field [0001] The invention relates to a pressure reducing valve used in a fluid delivery system, in particular to a pressure reducing valve used in a high temperature, high solid content and high pressure drop system and a pressure reducing method. Background technique [0002] The pressure reducing valve is a kind of pressure control valve. When the pressure of the hydraulic system reaches the set value of the valve, the pressure reducing valve discharges part or all of the liquid, thereby achieving the function of keeping the pressure in the hydraulic system below the set value. [0003] From the point of view of fluid mechanics, the pressure reducing valve is a throttling element whose local resistance changes in scientific research, that is, by changing the throttling area, the flow velocity and kinetic energy are changed, resulting in different pressure losses, so as to achieve the purpose of pressure reduction. [0004] The pressure reducing valve described in the pat...

AI Technical Summary

Problems solved by technology

However, its conical decompression device is composed of an orifice on a hollow cone. The orifice is perpendicular to the flow direction of the fluid, and there is a dead angle in the pipeline, and the diameter of the orifice is also small. Liquid is suitable, but the orifice is small and easy to block, so it is not suitable for materials containing solid particles

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