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Double sealing valve structure

A sealing structure, double sealing technology, applied in shaft sealing, valve details, valve device, etc., to reduce the medium pressure, prolong the service life, and ensure the sealing effect.

Active Publication Date: 2009-06-10
广东联塑阀门有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the difficulties of the prior art, and the purpose is to provide a double-seal valve structure that effectively protects the sealing packing and ensures good sealing performance

Method used

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Embodiment 1

[0024] Such as Figure 5 The double-sealed valve structure shown includes a disc 1 , a valve stem 2 , a sealing seat 21 on the valve stem, a valve cover 3 , a sealing packing 4 , a packing gland 5 and a sealing ring 6 . The sealing packing 4 provided between the valve stem 2, the packing gland 5 and the valve cover 3 is used as the first layer of sealing structure, and the lower end of the first layer of sealing structure is also equipped with a second sealing structure, which is a self-pressing hard sealing structure, that is, Through the sealing structure of the metal sealing surface between the sealing seat 21 on the valve stem and the inner wall of the valve cover 3, an auxiliary sealing structure is also provided between the second sealing structures, that is, it is sleeved on the valve stem 2. The sealing ring 6 on the top, the sealing ring 6 is a metal sealing ring, its bottom surface is placed on the sealing seat 21 of the valve stem, and there is also a gap that the s...

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Abstract

The invention discloses a double sealing valve structure, comprising a valve rod and a valve cover. The part between the valve rod and the valve cover is provided with a sealing stuffing as the first layer of a sealing structure, the lower end of which is provided with a second sealing structure, the second sealing structure is a self-pressure hard sealing structure, that is to say, a sealing structure of a metal sealing surface which is arranged between a sealing seat on the valve rod and the inner wall of the valve cover to a metal sealing surface, the second sealing structure is also provided with an accessory sealing structure which is a sealing ring sleeved with the valve rod, the bottom surface of the sealing ring is arranged on the sealing seat of the valve rod, and clearance whichcan ensure the sealing ring move on the sealing seat is kept between the sealing ring and the valve rod. The technical scheme provided by the invention protects the sealing stuffing effectively, has important positive role in energy saving and consumption reduction and greatly reduces the running cost of the pipeline system in the prior art.

Description

technical field [0001] The invention relates to a valve structure, in particular to a double-seal valve structure capable of ensuring that the valve meets strict sealing requirements in the use state, and belongs to the technical field of pipeline valves. Background technique [0002] The current valves, especially the gate valve, because of the high pressure of the fluid medium, when the gate is lifted, the valve body is filled with high-pressure fluid. The seal at the valve stem is generally equipped with a self-pressure hard seal structure (also known as the upper seal, which is a metal-to-metal seal), that is, through the metal seal between the seal seat on the valve stem and the inner wall of the valve cover, the metal seal faces the metal seal. The sealing structure of the sealing surface is used to better protect the valve stem sealing packing. Usually, the sealing packing is used as the first layer of sealing structure, and the self-pressing hard sealing structure is...

Claims

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Application Information

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IPC IPC(8): F16K41/02F16K41/00
CPCF16K41/02
Inventor 杨卫杨继跃黄虹宾
Owner 广东联塑阀门有限公司
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