A globe valve that can enhance the sealing performance between the valve core and the valve seat

Abstract

The invention discloses a shut-off valve capable of enhancing the sealing performance between a valve core and a valve seat, comprising a valve body, a valve cover, a flow channel, a valve stem, a valve core, and a valve seat, and an auxiliary weight cavity is arranged in the valve core And the collection input port and the collection output port connected with it, there is a stroke hole in the valve core, the collection input port is located on the inner side wall of the stroke hole, and the stroke hole is provided with a sealing assembly that can seal or open the collection input port; the present invention It has the following advantages and effects: it can increase the sealing performance between the valve core and the valve seat, thereby preventing internal leakage and prolonging the service life of the stop valve.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a stop valve capable of enhancing the sealing performance between a valve core and a valve seat. Background technique [0002] The globe valve, also known as the gate valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve core to force the sealing surface not to leak. When the fluid medium enters the valve from the bottom of the valve core, the resistance that the operating force needs to overcome is the friction force between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve The diameter of the stem should be large, otherwise the failure of the stem to bend will occur. When the stop valve is working, the valve stem is used to drive the reciprocating movement of the valve core, so as to realize the communication or i...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the stop valve relies on the tight contact between the valve core and the valve seat to achieve sealing. However, in the long-term use process, the valve core is prone to fatigue accumulation, resulting in a gap between the valve core and the valve seat during sealing. As a result, the internal leakage of the shut-off valve, and even the failure of the shut-off valve to work normally

[0004] The general solution is to replace the entire shut-off valve, but since the accessories of other parts of the shut-off valve are still in the stage of normal use and undamaged

If the entire shut-off valve is replaced, resources will be wasted; if only the valve core in the shut-off valve is replaced separately, there is a problem that the replacement operation is difficult for the existing shut-off valve

Images