Washout-resistant sealing structure of regulating valve

Abstract

The invention discloses a washout-resistant sealing structure of a regulating valve. The washout-resistant sealing structure is characterized by comprising a valve body, a valve seat, a valve element,and a sleeve matched with the valve element; a flow channel for allowing a medium to pass through is arranged in the valve body, the flow channel comprises a flow-in section, a buffering section, a valve cavity section and a flow-out section, and the cross sectional area of the buffering section is larger than those of the flow-in section, the valve cavity section and the flow-out section; the valve seat is arranged on an outlet of the valve cavity section, the sleeve is arranged on the buffering section, and the valve element is arranged in the valve cavity section and the sleeve; the bottomend of the valve element is located on an outlet of the valve cavity section, a sealing face is formed between the bottom end of the valve element and the outlet of the valve cavity section through the contact between the bottom end of the valve element and the valve seat, and an axial protruding structure is arranged at the bottom end of the valve element; and the axial protruding structure protrudes out of the bottom end of the valve element and is located in the valve seat and matched with the valve seat. According to the washout-resistant sealing structure, the direct scouring action of amedium on the sealing face of the valve element can be effectively relieved, the integrity of the sealing face of the valve element is protected, and the service life of the valve element is prolonged.

Description

technical field [0001] The invention relates to an erosion-resistant sealing structure of a regulating valve, belonging to the fields of processing engineering and valves. Background technique [0002] Existing regulating valve is made up of valve body 21, valve seat 22, spool 23, sleeve 24, valve stem 25 etc., as figure 1 As shown, the valve core 23 acts on the valve seat 22 to play a sealing role. Such as figure 2 and image 3 As shown, during the opening and closing process of the valve, the medium flows into the valve cavity through the sleeve 24, and then the medium directly washes against the sealing surface of the valve core 23, and then flows out through the valve body flow channel 26. After long-term use, the medium will The sealing surface of the valve core 23 and the valve seat 22 produces relatively serious erosion and wear, which is easy to damage the sealing surface of the valve core 23, resulting in a decrease in tightness, so that the frequency of repairi...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the sealing surface of the spool of the existing regulating valve sealing structure is easily eroded by the medium

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