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Air bag valve

An air bag valve and valve body technology, which is applied to valve devices, cocks including cut-off devices, engine components, etc., can solve the problems of short service life, small opening and closing torque, and large opening and closing torque, etc. The effect of small closing torque and zero leakage rate

Inactive Publication Date: 2006-08-30
JIANGSU SHENTONG VALVE
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing ash unloading ball valve, such as large opening and closing torque, serious plugging phenomenon, easy wear and short service life of the sealing ring, the invention provides a sealing ring that decompresses and retracts when the valve is opened, and the valve core and the sealing ring There is no contact between them, the opening and closing torque is small, and the airbag valve has a long service life

Method used

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Embodiment Construction

[0011] Such as figure 1 As shown, a kind of airbag valve comprises valve body 11, valve cover 2, upper valve shaft 10, lower valve shaft 9, driving device 1 and end cover 7, valve body 11 and valve cover 2 are connected by bolts, end cover 7 and The valve body 11 is connected by bolts, and the valve core 8 is supported in the valve body 11 through the upper valve shaft 10 and the lower valve shaft 9. The valve body 11 is also equipped with a ring-shaped semi-enclosed rubber sealing ring 4, and the sealing ring 4 is inlaid with There is a metal inner lining 6 with a plurality of radial through holes 5, and an air inlet 3 is also opened on the valve body 11. The air inlet 3 is externally connected to compressed air and communicates with the metal inner lining 6 inside. After assembly, There is a gap of 1 to 1.5 millimeters between the spool 8 and the sealing ring 4. The action principle is as follows: When the valve is closed in place, the compressed air enters the metal inner ...

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Abstract

A gasbag valve comprises a valve body, a valve cover, upper and lower valve shafts, a drive device, a spool, an end cap and a seal ring. The valve body is connected with the valve cover via bolts. The spool is supported in the valve body by the upper and lower valve shafts. In the valve body is mounted the seal ring, in which is inlaid a metal lining ring with several radial through-holes. An air inlet is set on the valve body. Outside the air inlet there is compression air and the inside of the air inlet is in communication with the metal lining ring. The seal ring is made of acrylonitrile rubber or silicon rubber.

Description

Technical field [0001] The invention relates to a valve for cutting off medium flow on a pipeline, in particular to a valve which uses compressed gas to expand a sealing ring to realize sealing. Background technique [0002] At present, in the blast furnace bag dust removal system in the metallurgical industry, the combination of ash unloading ball valve and star-shaped impeller feeder is mostly used. The ash unloading ball valve adopts a fixed structure, and several springs are installed on the steps of the valve seat. The seat presses against the ball to achieve sealing. During the action process, due to the action of the spring, the ball and the valve seat are always in a state of contact friction, the opening and closing torque is large, the stagnation phenomenon is serious, the sealing ring is easy to wear, causing leakage, and the service life of the valve is short. Contents of the invention [0003] In order to overcome the shortcomings of the existing ash unloading...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20
Inventor 吴建新张逸芳陆平倪燕
Owner JIANGSU SHENTONG VALVE
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