A flow regulating valve

Abstract

The invention discloses a flow regulating valve which is characterized in that a barrel-shaped guide sleeve is arranged at the lower end of a valve core; flow adjusting windows are formed in the barrel-shaped guide sleeve and composed of a triangular window and a rectangular window; the upper layer is the triangular window with an upward vertex angle; a barrel-shaped valve seat is composed of a valve seat and a valve barrel; the inner diameter of the valve seat is smaller than that of the valve barrel; an assembly boss is arranged in the middle of the outer wall of the valve seat; an assembly groove matched with the lower end part of the assembly boss of the valve seat is formed at a liquid outlet in a valve body; the valve seat is connected with the valve body through the assembly boss and the assembly groove; an assembly groove matched with the upper end part of the assembly boss of the valve seat is formed in the inner wall of the lower end of the valve barrel; the valve barrel is connected with the valve seat through the assembly groove and the assembly boss; and the valve barrel and the valve seat are fixed in the valve body through a valve cover and bolts. According to the flow regulating valve, cut-off sealing surfaces of the valve core and the valve seat are separated from a flow adjusting surface, so that the phenomenon that the valve is damaged due to washing when being opened slightly is avoided, therefore, the service life of the valve is prolonged greatly; and the flow regulating valve has the advantages of accurate flow adjustment, small flow fluctuation during starting, low noise and the like.

Description

technical field [0001] The invention relates to valve technology, in particular to a flow regulating valve with simple operation, convenient flow control and long service life. Background technique [0002] As we all know, the flow regulating valve in the valve is widely used in thermal power systems such as thermal power generation and petrochemical industry, especially in thermal power systems such as thermal power generation and petrochemical industry. The flow regulating valve is equipped with a valve body. There is a cylindrical valve seat hole in the body, a liquid inlet chamber connected with the valve seat hole is provided under the valve seat hole, and a liquid outlet chamber is provided on the valve body in the middle of the valve seat hole, and the liquid inlet chamber and the liquid outlet chamber are respectively passed through the valve. The channel in the body is connected with the liquid inlet and the liquid outlet. A cylindrical valve seat matching the valve...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned flow regulating valves are that, when adjusting in a small amount, it is easy to appear the phenomenon of "micro-opening and flushing damage", which greatly reduces the service life of the valve

When the valve inlet pressure is constant, the smaller the opening of the valve core, the greater the scouring force on the sealing surface of the valve core and valve seat. If the valve core is in a small opening for a long time, the The sealing surface will be damaged; the second is that the flow adjustment is inaccurate when adjusting the flow, the flow fluctuates greatly and generates large noise

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