A valve stem sealing device

A sealing device and valve stem technology, which is applied to valve devices, shaft seals, cocks including cut-off devices, etc., can solve the problems of short use time and frequent replacement of seals, and achieve reliable sealing, convenient use and adjustable sealing degree. Effect

Active Publication Date: 2019-08-02
ZHEJIANG IND & TRADE VACATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a valve stem sealing device, which solves the shortcomings of existing seals such as short service life and frequent replacement.

Method used

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  • A valve stem sealing device
  • A valve stem sealing device
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Embodiment Construction

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0029] Refer below Figure 1 to Figure 5 The present invention is described further, as figure 1 A valve stem sealing device 7 shown is arranged between the valve body 1 and the upper valve stem 3 .

[0030] Such as figure 2 , image 3 with Figure 4 As shown, the valve stem sealing device 7 includes a cylindrical sealing ring 71, several support sleeves 72, several elastic supports 73 and screw caps 76, and an annular receiving groove 715 is provided on the cylindrical sealing ring 71 to hold the The side wall of the cylindrical sealing ring 71 is divided into an inner cylindrical ring 711 and an outer cylindrical ring 713; several supporting sleeves 72 are sequentially sleeved in the annular receiving groove 715 along the axis of the cylindri...

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Abstract

The invention provides a valve rod sealing device. The valve rod sealing device comprises a cylindrical sealing ring, a plurality of supporting sleeves, a plurality of elastic supporting pieces and ascrew cap, wherein an annular accommodating groove is formed in the cylindrical sealing ring to divide the side wall of the cylindrical sealing ring into an inner cylindrical ring and an outer cylindrical ring; the supporting sleeves are sequentially arranged in the annular accommodating groove along the axis of the cylindrical sealing ring in a sleeving mode; the elastic supporting pieces are sequentially arranged in the annular accommodating groove along the axis of the cylindrical sealing ring in a sleeving mode, the elastic supporting pieces and the supporting sleeves are alternately arranged, and outer supporting rings and inner supporting rings of the elastic supporting pieces separately abut against the side wall of the outer cylindrical ring and the side wall of the inner cylindrical ring; and the screw cap is threaded to a valve body, and the inner top surface of the screw cap abuts against a deformation part of the elastic supporting piece which is located at the uppermost layer. The valve rod sealing device has good sealing performance, does not need frequent replacement and is convenient to use.

Description

technical field [0001] The invention relates to the technical field of valve sealing, in particular to a valve stem sealing device. Background technique [0002] The commonly used ball valve is composed of a valve stem and a valve body, and the valve stem passes through the through hole of the valve body. The working principle of the ball valve is to control the opening and closing of the valve by turning the valve stem. In order to prevent leakage, it is required to seal between the valve stem and the valve body. At present, the stem seal of most ball valves is mainly sealed to prevent leakage by packing or using multiple PTFE gaskets to superimpose or set multiple sealing rings on the valve stem. However, for ball valves that are frequently opened and closed or used in a state of vibration, the packing seal will loosen or wear after a period of use and cause leakage. It is necessary to replace the sealing device to seal again. Frequent replacement not only affects work ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/06
CPCF16K5/0694
Inventor 郑胜峰陈学磊
Owner ZHEJIANG IND & TRADE VACATIONAL COLLEGE
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