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Corrugated pipe valve rod

A bellows valve and bellows technology, applied in valve details, valve devices, valve operation/release devices, etc., can solve the problems of surrounding environment and personal safety consequences, poor fatigue resistance, etc., and achieve good sealing and fatigue resistance High performance and easy processing

Inactive Publication Date: 2016-05-25
MAANSHAN RUNQI NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During use, once the valve stem seal is damaged, strong corrosion, volatile, toxic and harmful process media leak from the control valve stem, which will bring serious consequences to the surrounding environment and personal safety, so bellows valves are often used Rod solves the above problems. The existing bellows valve stem is made of thick stainless steel and pressed into a bellows, which has poor fatigue resistance.

Method used

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  • Corrugated pipe valve rod

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Embodiment Construction

[0013] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples and accompanying drawings. This embodiment is only used to explain the present invention, and does not constitute a limitation to the protection scope of the present invention.

[0014] Such as figure 1 An embodiment of the bellows valve stem of the present invention is shown. The bellows valve stem includes a polished rod section 1 and a threaded section 2 at both ends of the polished rod section 1 and a valve stem head 5. A connecting groove is opened on the top end of the valve stem head 5 7. There is a bellows 6 on the polished rod section 1 close to the valve stem head 5, and a protective cover 4 is fixed on the end of the bellows 6 farther from the valve stem head 5. The bellows 6 has a double-layer thread structure, and the threaded section There is a knife relief groove 3 between 2 and the polished rod section 1, the p...

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PUM

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Abstract

The invention discloses a corrugated pipe valve rod. The corrugated pipe valve rod comprises an unthreaded rod segment, threaded segments at the two ends of the unthreaded rod segment, and a valve rod head. A connecting groove is formed in the top end of the valve rod head. A corrugated pipe is arranged on the portion, close to the valve rod head, of the unthreaded rod segment. The end, far away from the head of the valve rod head, of the corrugated pipe is fixedly provided with a protective cover. The corrugated pipe is of a dual-layer threaded structure. The corrugated pipe valve rod has the advantages that the structure is simple and ingenious, the strength of the corrugated pipe valve rod is effectively enhanced, and the fatigue resistance of the corrugated pipe valve rod is improved.

Description

technical field [0001] The invention relates to a valve stem, in particular to a bellows valve stem. Background technique [0002] The valve stem is an important part of the valve structure. It is used for transmission. The upper part is connected to the actuator or the handle, and the lower part directly drives the valve core to move or rotate, so as to realize the switch or adjustment of the valve. During use, once the valve stem seal is damaged, strong corrosion, volatile, toxic and harmful process media leak from the control valve stem, which will bring serious consequences to the surrounding environment and personal safety, so bellows valves are often used The rod solves the above problems. The existing bellows valve stem is made of thick stainless steel and pressed into a bellows, which has poor fatigue resistance. Contents of the invention [0003] The purpose of the present invention is to overcome the above disadvantages and provide a bellows valve stem with a si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/50F16K41/10
CPCF16K31/50F16K41/10
Inventor 于森
Owner MAANSHAN RUNQI NEW MATERIAL SCI & TECH
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