High-pressure difference sleeve adjusting valve

Abstract

The invention discloses a high-pressure difference sleeve adjusting valve. The high-pressure difference sleeve adjusting valve comprises a valve body, a valve cover and a valve inner piece which is arranged in the valve body and the valve cover. The valve inner piece further comprises a valve cage, a valve seat, a valve rod and a valve element. The valve element is fixedly connected with the lowerend of the valve rod. The valve cage and the valve seat are overlapped up and down and are of a sleeve structure relative to the valve element. A first medium pressure reducing buffer space is reserved between the valve cage and the upper segment of the valve element, a second medium pressure reducing buffer space is reserved between the valve seat and the lower segment of the valve element, andthe three-stage pressure reducing adjusting valve is formed with a third medium pressure reducing buffer space. According to the high-pressure difference sleeve adjusting valve, by means of the firstmedium pressure reducing buffer space, the second medium pressure reducing buffer space and the third medium pressure reducing buffer space, multi-stage pressure reducing is achieved, the phenomenon that the sealing face of the valve is prone to being scoured by high-speed medium fluid and erosion is caused is eliminated, and the problems that the sealing face is blown damage, inner leaking and erosive abrasion are caused, and the noise is large and other problems are avoided.

Description

technical field [0001] The invention relates to the field of valves, in particular to a high pressure difference sleeve regulating valve. Background technique [0002] The high pressure differential sleeve regulating valve is mainly used on high temperature and high pressure straight stroke valves to regulate and reduce pressure. The pressure-reducing structure inside directly determines the pressure-reducing effect of the high-pressure differential sleeve regulating valve. At present, most of the traditional high-pressure differential sleeve regulating valves have multiple flow holes on the sleeve (cage), through which the medium flows. After the hole, the pressure is reduced and buffered in the buffer space between the sleeve (cage) and the valve core to achieve the effect of reducing the pressure. However, simply using this structure to reduce pressure, in a high-pressure environment, when the valve core is opening and closing, the flow channel area is extremely small, t...

AI Technical Summary

Problems solved by technology

However, simply using this structure to reduce pressure, in a high-pressure environment, when the valve core is opening and closing, the flow channel area is extremely small, the medium flow rate is high and the pressure drops sharply, and the valve sealing surface is still vulnerable to high-speed medium. Fluid scouring and erosion phenomenon will result in blowing damage to the sealing surface. In severe cases, the regulating valve will not be closed tightly, internal leakage will occur, and it will also cause problems such as scouring wear and loud noise.

Images