Stem Seal

A technology of sealing device and valve stem, which is applied in valve device, shaft seal, valve details, etc., to achieve the effects of reducing wear, reducing sealing force, and simple and novel structure
CN105318096BActive Publication Date: 2018-03-16JIANGSU CHNV INSTR CONTROL ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU CHNV INSTR CONTROL ENG
Publication Date
2018-03-16

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Abstract

The invention relates to a valve rod sealing device. The valve rod sealing device comprises a sleeve sleeving the outer side of a valve rod, filler for sealing the valve rod and pressing components and compacting mechanisms used for compacting the filler; the sleeve comprises an upper sleeve and a lower sleeve; the filler and the pressing components are located between the upper sleeve and the lower sleeve; the filler is close to the valve rod; the inner side parts of the pressing components are pressed against the periphery of the filler; the outer side parts of the pressing components are provided with first arc slopes; the lower sleeve is provided with a second arc slope matched with the outer side parts of the pressing components; the compacting mechanisms are used for compacting the upper sleeve and the lower sleeve together axially; and when the compacting mechanisms perform compacting, the filler is axially compacted by the pressing components through the first arc slopes. By adopting the valve rod sealing device, the sealing property and operation handfeel of the valve rod can be regulated and taken into account.
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Description

technical field

[0001] The invention relates to the field of valves, in particular to a valve stem sealing device. Background technique

[0002] At present, the structure of the valve includes a valve body, a valve cavity is arranged in the valve body, a valve core is installed in the valve cavity, and a valve stem is connected to the valve core. Valves with multiple branches are used in various fields such as agriculture and industry. However, the existing valve stems are not only not stable, but also prone to leakage. Especially for the valve stem which can both rotate and move axially telescopically, the sealing of the valve stem has always been a difficult problem. Because it is extremely difficult to not only ensure the rotation and up and down telescopic activities of the valve stem, but also to seal, and to ensure that the sealing performance can be adjusted after wear. Contents of the invention

[0003] In order to solve the sealing problem of the valve stem capa...

Claims

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