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Double sealing valve structure

A sealing structure and double-seal technology, applied in shaft seals, valve details, valve devices, etc., to achieve the effects of ensuring sealing effects, prolonging service life and increasing safety

Active Publication Date: 2013-02-27
GUANGDONG LIANSU VALVE CO LTD
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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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  • Double sealing valve structure
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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, and its bottom surface is placed on the sealing seat 21 of the valve stem, and there is also a gap that t...

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Abstract

A double seal valve structure includes a valve rod (2) and a valve cover (3), a seal padding (4) acting as the first seal structure is provided between the valve rod (2) and the valve cover (3), the lower end of the first seal structure is provided with a second seal structure, the second seal structure is a self-compression type hard seal structure between the metal seal surface of a seal seat (21) provided on the valve rod (2) and the metal seal surface of the inner wall of the valve cover (3); a seal ring (6) sleeved on the valve rod (2) acting as the additional seal structure is provided between the two seal surfaces of the second seal structure, the bottom portion of the seal ring (6) is arranged on the seal seat (21) of the valve rod (2), and a gap is formed between the seal ring (6) and the valve rod (2) to facilitate movement of the seal ring (6) on the seal seat (21).

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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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/02F16K41/00
CPCF16K41/02
Inventor 杨卫杨继跃黄虹宾
Owner GUANGDONG LIANSU VALVE CO LTD
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