Valve rod sealing structure
A sealing structure and valve stem technology, applied in shaft seals, valve details, valve devices, etc., can solve problems such as leakage, achieve good compatibility, avoid medium leakage, and improve safety and reliability.
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[0020] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
[0021] Conventionally, the valve that uses V-shaped packing 3 as the stem seal is suitable for use under high-pressure conditions. V-shaped packing 3 is affected by the medium force. The greater the medium force, the better the sealing effect. If the medium force in the valve is lower than the normal level, then It will cause the seal to fail, and then there will be media leakage problems. The invention improves the sealing in the stuffing box hole, and provides sealing remedial measures while satisfying the high and low pressure sealing, so as to enhance the reliability and safety of the valve stem sealing. The specific structure is as follows:
[0022] This...
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