A valve transmission rod sealing structure

A technology of sealing structure and transmission rod, which is applied in the direction of shaft sealing, valve details, valve device, etc., can solve the problems of short service life and inability to achieve sealing, and achieve long-term reliable sealing and reliable sealing effect

Active Publication Date: 2016-05-18
SUFA TECH IND CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some existing transmission rod sealing structures have good sealing performance, but the service life is not long, and some can not achieve good sealing performance in consideration of prolonging the service life

Method used

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  • A valve transmission rod sealing structure

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] Such as figure 1 As shown, a transmission rod sealing structure of a valve of the present invention includes a transmission rod 1 with a shoulder 2 in the middle, an upper compression sleeve 3 and a lower compression sleeve 4 sleeved on the transmission rod 1, and a compression ring nut 5 and a compression ring nut 5. Ring 6, an upper sealing ring 7 is provided between the shoulder 2 and the compression ring nut 5, a lower sealing ring 8 is provided between the shoulder 2 and the compression ring 6, a rhombus is installed between the upper compression sleeve 3 and the lower compression sleeve 4 sealing ring 9.

[0013] When the valve is assembled, the lower sealing ring 8 and the upper sealing ring 7 are respectively pressed on the transmission rod 1 through the compression ring nut 5 and the compression ring 6 to form each and the second dynami...

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Abstract

The present invention belongs to the technical field of valve transmission rod sealing, and specifically relates to a transmission rod sealing structure for a valve. The transmission rod sealing structure is characterized in that: the transmission rod sealing structure comprises a transmission rod with a crossette disposed in a[the] middle portion of the transmission rod, an upper pressing sleeve and a lower pressing sleeve jacketing the transmission rod, and a press ring nut and a press ring, wherein an upper sealing ring is disposed between the crossette and the press ring nut, a lower sealing ring is disposed between the crossette and the press ring, and a rhombic sealing ring is disposed between the upper pressing sleeve and the lower pressing sleeve. Sealing components are two fluoroplastic sealing rings and one rhombic rubber sealing ring, together three seals. The sealing rings which are made of fluoroplastic materials and the transmission rod are in a plane sealing, for having smaller friction between the sealing rings and the transmission rod after axial sealing force is applied. The rhombic rubber sealing ring and the transmission rod are in a line seal, belonging to a pressure self-sealing and having sealing reliability. The transmission rod sealing structure for a valve can ensure a long-term and reliable sealing of the transmission rod on the premise of not affecting movement flexibility of the valve.

Description

technical field [0001] The invention relates to the technical field of sealing of a valve transmission rod, in particular to a sealing structure of a transmission rod of a valve. Background technique [0002] The 90° rotary valve drives the transmission rod to make a 90° rotation through the operating mechanism, and then the transmission rod drives the sealing element to complete the opening and closing of the valve. The sealing structure of the transmission rod must ensure that the valve is sealed reliably and has a long service life no matter whether it is stationary or in the process of opening and closing. Some existing sealing structures of transmission rods have good sealing performance, but the service life is not long, and some can not achieve good sealing performance in consideration of prolonging the service life. Contents of the invention [0003] The object of the present invention is to provide a sealing structure for a transmission rod of a valve with good s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/04
Inventor 管国良陈世德王志敏徐咏斌
Owner SUFA TECH IND CNNC
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