Throttle valve

Abstract

The invention discloses a throttle valve. The throttle valve comprises a valve body, a valve core, a rotary valve stem, a valve cover and a handle, wherein the valve core is arranged in the valve body; the handle is connected with the rotary valve stem; the valve cover covers the upper side of the valve body; a choke of the valve body is provided with an L-shaped sealing step; an inverted trapezoidal structure is formed on the lower part of the valve core and is matched with the L-shaped sealing step; a pressure relief valve stem is screwed on the lower part of the rotary valve stem; the lower part of the pressure relief valve stem is extended into a pressure relief valve passage of the valve core; and the lower end of the pressure relief valve stem is provided with a pressure relief valve core. The throttle valve has the characteristics of high sealing property, long service time and labor saving in opening.

Description

a throttling valve technical field The invention relates to a valve, in particular to a throttle valve. Background technique During the use of the existing throttle valve, impurities and particles in the fluid have a greater damage effect on the sealing surface, and this kind of valve is prone to seal failure after a period of use. Therefore, the existing throttle valve has short service life and low reliability. If the existing throttle valve is used in a pipeline of high-speed fluid, it is more prone to seal failure. Contents of the invention The object of the invention is to design a throttle valve. The invention aims to solve the problems that the existing throttle valve is prone to seal failure, short service life and low reliability. The technical solution of the present invention is: the present invention comprises a valve body, a valve core, a rotating valve stem, a valve cover and a handle. There is an L-shaped sealing step at the throttle port of the val...

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