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

Active Publication Date: 2018-03-16
JIANGSU CHNV INSTR CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the sealing problem of the valve stem that can not only rotate but also move axially, the object of the invention is to provide a valve stem sealing device, which can be adjusted and take into account the tightness and feel of the valve stem

Method used

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as Figures 1 to 4 A valve stem sealing device is shown, the valve stem sealing device is mainly aimed at the valve stem 3 having a circular cross-section, and the valve stem 3 needs to be rotated and moved axially during operation.

[0020] The sealing device for the valve stem includes a sleeve 7 sleeved on the outside of the valve stem, a packing 72 for sealing the valve stem, a pressing piece 73 for pressing the packing, and a pressing mechanism 8 . And the sleeve 7 includes an upper sleeve 71 and a lower sleeve 74 . Both the filler 72 and the pressure piece 73 are located between the upper sleeve 71 and the lower sleeve 74 , and since the valve stem 3 is a polished rod with a circular cross section, the filler 72 also forms a ring and is located outside the valve stem 3 . The inner side of the pressing piece 73 is against the outer periphery of the f...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/02
CPCF16K41/02
Inventor 唐洪波孟强严干顺韦峰张勇
Owner JIANGSU CHNV INSTR CONTROL ENG
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