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External-pressure type bellows globe valve with non-rotating valve rod

A bellows stop valve, external pressure technology, applied in the direction of valve lift, valve details, valve device, etc., can solve the problems of short service life, single structure, etc., achieve excellent sealing performance, reduce friction and wear, improve Effects on service life and handling performance

Inactive Publication Date: 2013-08-14
JIANGSU XINGHE VALVE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current bellows globe valve in my country has a single structure and can only be used under the working conditions of low pressure, low temperature and safe medium, and its service life is short.

Method used

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  • External-pressure type bellows globe valve with non-rotating valve rod
  • External-pressure type bellows globe valve with non-rotating valve rod

Examples

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] 1. A valve stem non-rotating external pressure bellows stop valve, consisting of valve body 1, valve core 2, special metal bellows 4, valve seat 5, valve cover 7, flange 9, packing 12, valve stem 13, The adjustment part 14, the bearing seat 16, the steel ball 17, the valve stem nut 18, the shaft sleeve 20, etc.; it is characterized in that: the end 4-1 of the special metal bellows is welded and sealed with one end of the valve core 2, and the special metal bellows b The end 4-2 is welded and sealed with the flange 9, and one end of the valve core 2 is threaded with the valve stem 13 to form a bellows assembly. Put it in the valve seat 5, there are metal sealing ring b8 and metal sealing ring c10 under and above the flange 9 respectively, the thread of the valve cover 7 cooperates with the thread on the upper part of the valve seat 5 for tight sea...

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Abstract

The invention relates to an external-pressure type bellows globe valve with a non-rotating valve rod. The external-pressure type bellows globe valve with the non-rotating valve rod is composed of a valve body, a valve core, a special metal bellows, a valve seat, a valve cover, a flange, filling, the valve rod and an adjusting part. The external-pressure type bellows globe valve with the non-rotating valve rod comprises a quadruple sealing mode which is achieved by closing the valve, opening a stop back seal structure, forming a metal shield when the periphery of the special metal bellows is pressed and filling heat resisting materials. The valve core stop back seal structure is formed after the valve is opened, and the valve rod is matched with a valve rod nut with a rolling rotation steel ball to achieve a non-rotating vertical motion structure. When in use, the external-pressure type bellows globe valve with the non-rotating valve rod has a small friction force and very little abrasion loss, thereby being good in sealing performance, safe, reliable, long in service life, easy to operate and particularly applicable to high-temperature, high-pressure, radioactive, flammable and explosive mediums and places which have damage on aspects such as health, security and environment.

Description

technical field [0001] The invention relates to an opening and closing and control device for poisonous, radioactive or inflammable and explosive and other harmful media in various instrument (flow, differential pressure, pressure, liquid level, etc.) pipelines of industrial automation control systems and other industrial pipelines. Background technique [0002] The structure of the widely used globe valve is sealed by the upper packing to prevent external leakage. Due to the movement between the packing and the valve stem, inevitable friction and wear factors are generated, so there is a possibility of leakage in the structure. Some media (such as: high temperature, high pressure, poisonous, flammable, explosive, radioactive, etc. that cause harm to safety, environment and biological health) are not allowed to leak. [0003] The current bellows globe valve in my country has a single structure and can only be used in the working conditions of low pressure, low temperature an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K41/00F16K1/50F16K1/34
Inventor 朱义芳张逢利耿成林
Owner JIANGSU XINGHE VALVE
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