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Bellows stop valve

A technology of bellows stop valve and valve stem, which is applied in the direction of valve lift, valve detail, valve device, etc., can solve the problems of shortened valve life, production loss, and inability to operate at high frequency, so as to increase yield strength and prolong service life Effect

Active Publication Date: 2011-03-02
FUJIAN JINJIANG TECH
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AI Technical Summary

Problems solved by technology

[0002] Bellows globe valve is a new generation product of valves. It has obvious advantages, reasonable structure, excellent performance, reliable sealing, convenient operation and wide application. It is suitable for flammable, explosive, highly toxic, toxic fluids, high temperature heat transfer oil, vacuum, For steam, water and other media occasions, our bellows globe valves are mainly used in steam and high-temperature heat transfer oil occasions, and the safety level requirements are extremely high; but there are also serious disadvantages: when used in some special occasions (such as steam, toxic gas, corrosive gas), the life of the valve will be shortened, and it will not be able to operate at high frequency, which will easily cause production loss and safety accidents

Method used

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Embodiment Construction

[0010] refer to figure 1 , a bellows stop valve, including a handwheel (1), an oil injection pipe (2), an upper valve stem (3), a lower valve stem (4), a positioning key (5), a valve cover (6), a bellows ( 7), valve body (8), interface A, interface B, the valve stem is placed in the valve cover (6), and the lower end of the valve stem extends into the valve disc (9) in the valve body, characterized in that: the The valve stem is composed of an upper valve stem (3) and a lower valve stem (4). The lower part of the upper valve stem is provided with an internally threaded hole (10) in the center, and the upper part of the lower valve stem is provided with an external thread (11) matching the internally threaded hole. ), the upper part of the upper valve stem is provided with an oil injection pipeline (2) leading from the upper end surface to the inner threaded hole.

[0011] In order to ensure that the lower valve stem is rotated to protrude from the upper valve stem, a sealing ...

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Abstract

The invention relates to a bellows stop valve, comprising a valve rod arranged in a valve cap; wherein the lower end of the valve rod is extended into the valve clack in the valve body; the valve rod is composed of an upper valve rod and a lower valve rod, the lower part of the upper valve rod is opened with an inner threaded hole arranged at the center, the upper part of the lower valve rod is opened with an outer thread which is in fit with the inner threaded hole, and the upper part of the upper valve rod is opened with an open hole leading to the inner threaded hole from the upper end face. The invention has the advantages that not only structure is simple, operation is convenient, service life of bellows stop valve can be effectively prolonged, and safety level thereof is improved.

Description

technical field [0001] The invention relates to a valve, in particular to a bellows stop valve. Background technique [0002] Bellows globe valve is a new generation product of valves. It has obvious advantages, reasonable structure, excellent performance, reliable sealing, convenient operation and wide application. It is suitable for flammable, explosive, highly toxic, toxic fluids, high temperature heat transfer oil, vacuum, For steam, water and other media occasions, our bellows globe valves are mainly used in steam and high-temperature heat transfer oil occasions, and the safety level requirements are extremely high; but there are also serious disadvantages: when used in some special occasions (such as steam, toxic gas, When the gas is highly corrosive), the service life of the valve is shortened, and it cannot be operated at high frequency, which may easily cause production loss and safety accidents. Contents of the invention [0003] The object of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/32F16K41/00
Inventor 吴道斌
Owner FUJIAN JINJIANG TECH
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