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Valve rod mechanism for superhigh temperature high pressure valve

A high-pressure valve, ultra-high temperature technology, used in valve heating/cooling devices, lift valves, valve details, etc., can solve the problems of low valve stem strength, large temperature difference between inside and outside, easy to break, etc., to achieve compact structure and improve strength. , the effect of long service life

Inactive Publication Date: 2005-09-28
杨荣水
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems in the prior art that the valve stem mechanism of an ordinary ultra-high temperature and high pressure valve has an excessively large temperature difference between inside and outside, the strength of the valve stem is low, and the valve stem is easy to break, the present invention provides a valve stem mechanism of an ultra-high temperature and high pressure valve. The valve stem mechanism of the valve has a compact structure, the strength of the valve stem is high, and the service life is long

Method used

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Embodiment Construction

[0009] As shown in the figure, the present invention includes upper and lower valve stems 1 and 2 which are movably connected and a valve stem head 3 fixedly connected to the end of the lower valve stem 2. The round surface is provided with a protective layer 11, and a heat insulating layer 5 is provided between the protective sleeve 4 and the lower valve stem 2. Cooperate, the cooling air pipe 7 is installed in the inner hole 6 of the lower valve stem 2, the cooling air pipe 7 communicates with the air inlet 8, and the gap 9 between the cooling air pipe 7 and the inner hole 6 communicates with the air outlet 10.

[0010] The key of the present invention is that the lower valve stem 2 adopts a four-layer structure, and the outside is called a protective cover 4, which is made of high temperature resistant material GH3128. The lower end of the protective cover 4 and the lower valve stem 2 are welded together with the valve stem 3, and the upper end of the protective cover 4 is ...

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Abstract

The valve rod mechanism for super high temperature and super high pressure valve includes upper valve rod, lower valve rod connected to the upper valve rod, valve rod head fixed to the end of the lower valve rod, protecting jacket around the lower valve rod and with lower end fixed to the valve rod head and upper end matched with the slide sleeve around the upper part of the lower valve rod, heat isolating layer between the protecting jacket and the lower valve rod, and cooling gas pipe inside the lower valve rod communicated with the gas inlet. The present invention has effectively controlled inner and outer temperature difference of valve rod body, raised valve rod strength, compact structure, high reliability and long service life.

Description

Technical field [0001] The invention relates to a valve stem mechanism of an ultra-high temperature and high pressure valve. Background technique [0002] Valves are pipeline accessories used to control the flow of pipeline media and ensure the normal operation of the system. The valve is mainly composed of valve body, valve cover, valve stem, valve core, valve seat and operating mechanism (hand wheel, electric device, pneumatic device) and so on. The valve stem is the main transmission part of the valve, which transmits the thrust or torque of the operating mechanism to the valve core and other sealing parts to realize the opening or closing of the valve. The valve stem is a moving part in the high-temperature zone. The surface is eroded by high-speed airflow, and the interior is subjected to synthetic stress such as tensile stress, shear stress, torsional stress, and thermal stress. Therefore, the valve stem is one of the most vulnerable parts of the valve. one. The mec...

Claims

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Application Information

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IPC IPC(8): F16K1/32F16K49/00
Inventor 杨荣水李保升吴光斌王靖旺庞旭东
Owner 杨荣水
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