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Method for replacing valve sealing filler

A technology for sealing packing and valve replacement, which is applied in the field of valve sealing packing replacement and online valve sealing packing replacement, and achieves the effects of low cost, environmental protection and wide application.

Inactive Publication Date: 2009-06-10
GUANGDONG LIANSU TECH INDAL
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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 method for replacing the sealing packing without stopping the valve operation

Method used

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  • Method for replacing valve sealing filler
  • Method for replacing valve sealing filler
  • Method for replacing valve sealing filler

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Such as image 3 As shown, the valve sealing system includes valve disc 1, valve stem 2, sealing seat 21 on the valve stem, valve cover 3, sealing packing 4 or packing gland 5, and sealing packing 4 is located between packing gland 5 and valve cover 3 between. A sealing ring 6 is arranged between the sealing seat 21 on the valve stem and the valve cover 3, and there is a certain gap between the sealing ring 6 and the valve stem 2, so that the sealing ring 6 can move on the sealing seat 21 to ensure that the sealing ring 6 can move on the valve stem. 2 The tightness of the valve when it is tilted or deformed. Such as Figure 4 As shown, when the valve stem 2 is raised, the sealing ring 6 is in close contact with the valve cover 3 and the top of the valve stem sealing seat 21 , thereby replacing the sealing packing 4 above the sealing ring 6 . After the replacement is completed, lower the disc 1 to restore the valve image 3 status shown. During the whole operation p...

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PUM

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Abstract

The invention discloses a method for changing valve gland packing, that is to say, a sealing ring is arranged between a sealing seat which is arranged on a valve rod and a valve cover. When the valve rod rises, the leak tightness of the valve can be ensured by the sealing ring, thus changing the gland packing above the sealing ring. The technical proposal provided by the invention realizes online changing the gland packing without stopping the valve running and has important positive role in energy saving and consumption reduction, and at the same time, the method provided by the invention has advantages of low cost and easy operation and popularization, greatly reduces the running cost of the pipeline system in the prior art and is beneficial to environmental protection.

Description

technical field [0001] The invention relates to a method for replacing valve sealing packing, in particular to an online replacement method for valve sealing packing, which can safely replace sealing packing without stopping valve operation, 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-pressurized hard seal structure (also known as the upper seal. It is a metal-to-metal seal) in order to better protect the valve stem seal packing. figure 1 with figure 2 is a schematic diagram of a prior art sealing system, figure 1 For the case of the valve fully open, figure 2 For the case of fully closed valve, this sealing structure can effectively protect the sealing packing to a certain extent and prevent fluid l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K41/02F16K41/00F16K3/00
Inventor 杨卫杨继跃黄虹宾
Owner GUANGDONG LIANSU TECH INDAL