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Dual ring lever shoulder seal and independence dual valve lever seal

A ring rod and valve stem technology, applied in shaft seal, valve detail, valve device, etc., can solve the problems of rod shoulder seal, rod column seal and so on.

Inactive Publication Date: 2009-04-01
ZHEJIANG HUAXIA VALVE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first problem to be solved by the present invention is that the valve stem is blindly pushed out of the valve by the medium pressure on its end face, and the second problem to be solved is that the rod shoulder seal and the rod post seal cannot be completely ideal, and the problem of balanced effect and independent work at the same time

Method used

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  • Dual ring lever shoulder seal and independence dual valve lever seal
  • Dual ring lever shoulder seal and independence dual valve lever seal
  • Dual ring lever shoulder seal and independence dual valve lever seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015]As shown in Figure 2 and Figure 3, a double-ring rod shoulder seal of the present invention is composed of a sealing ring 07, a compression ring 08 and a spherical rod shoulder 06, and the material strength of the sealing ring is low-responsible for sealing the rod shoulder and the valve body Sealing, high strength compression ring material - responsible for the compression of the sealing ring, the spherical rod shoulder is installed to simultaneously press on the mutual support of the sealing ring and the compression ring, the sealing ring is an equilateral triangle ABC as the section: side AB The rotary surface is the prefabricated sealing cone surface of the spherical rod shoulder (the working sealing spherical surface is naturally formed during installation), the rotary surface of side BC is the pressure cone surface, and the rotary surface of side CA is the sealing surface of the valve body perpendicular to the axis of the valve stem , the compression ring has a trap...

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Abstract

A dual ring rod-shoulder seal consists of a sealing ring, a clamp ring and a spherical or taper rod-shoulder, wherein, the material of the sealing ring is designed according to the ultimate strength load and is permanently automatically exempted from the ultimate strength load so as to work according to self-sealing. An independent dual valve rod seal consists of a dual ring rod-shoulder seal, a triangle-section loop bar seal and an isolated match pair. In the process of installation and compaction, when the torque of the valve rod is significantly increased, the independent dual valve rod can ensure that the isolated match pair, the rod-shoulder seal and the post seal become effective automatically and simultaneously and independently bear the ultimate medium pressure, and provide double assurance to the leak tightness of the valve rod, without mutual interference.

Description

technical field [0001] The invention belongs to the engineering field of fluid power transmission and medium delivery, and relates to a ball valve rod seal used for fluid switch and control. Background technique [0002] The ball valve is a valve with a ball with a through hole in the center as a switch. The switch ball rotates in the valve body through the seat sealing butt joint, fully open when the through hole is aligned with the passage opening, and fully closed when the through hole is 90° to the passage opening. The rotation of the switch ball is implemented by the valve rod extending out of the valve body. The valve stem extends from the valve body or bonnet to the outside and needs to be sealed to prevent fluid from leaking along the stem. However, some valve stems only have a cylindrical seal (rod seal), and some valve stems only have a shoulder seal (rod shoulder seal), and ball valves require both a stem seal and a shoulder seal. [0003] The primary task of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K41/00F16K41/16
CPCF16K41/046F16K5/0694
Inventor 徐长祥杨茅陈占基
Owner ZHEJIANG HUAXIA VALVE
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