Adjustment of the pneumatic valve structure optimization design of pneumatic valve plate

connecting rod control pneumatic valve is a kind of structure form of butterfly pneumatic valve, mainly used in metallurgy in the pipes of blast furnace hot blast stove system, it has small volume, light weight, flexible, convenient tear open outfit. Therefore, linkage control pneumatic valve at the hot blast stove system medium such as air, gas, flue gas pipeline has been widely applied.
linkage control and the structure characteristics of pneumatic valve
connecting rod adjusting the structure of the pneumatic valve which is mainly composed of drive, pneumatic valve, pneumatic valve, shaft, rod and other components. Pneumatic valve opening and closing is driven by driving gear drive shaft rod mechanism motion, so as to realize the opening and closing of the pneumatic valve plate. Through analysis, regardless of the pneumatic valve is in open or closed, pneumatic valve plate and its moving parts is always surrounded by in the medium. Closed when the pneumatic valve, pneumatic valve plate to all under medium pressure, this will cause the plastic deformation of pneumatic valve plate, and makes deformation caused by the moving parts; When pneumatic open valve, pneumatic valve plate will scour by the media, as well as the medium flow caused by the vibration of the pneumatic valve plate itself, it will also accelerate the gearing parts of damage, especially articulated in solid self-lubricating bearing damage. Therefore, the connecting rod pneumatic valve pneumatic butterfly valve plate is the life of a connecting rod adjustment of the pneumatic valve life.
connecting rod pneumatic valve pneumatic butterfly valve plate structure analysis
according to the structure characteristics of the connecting rod pneumatic valve pneumatic butterfly valve plate, processing and manufacturing is generally not used when the casting structure, traditional pneumatic valve plate is mainly in the form of welding, pneumatic valve plate promulgation and plate adopts the steel sheet blanking directly, after the great circle plate blanking need hot press forming, pressure curve, and then with the vertical plate welding, the final machining.
from the perspective of technology for analysis of this kind of structure of the pneumatic valve plate, can be seen from the above, pneumatic valve plate consists of three parts: the vertical plate, plate, great circle plate. If use this kind of structure of the pneumatic valve plate, plate and plate can be directly blanking forming, first calculate the great circle plate requires technologist baiting size, and then according to the requirements of the arc pressure form is milled, the great circle with milled steel press forming, the last of the welding to the other two groups. And made pressure form in the main problems in this step, through the analysis we can see that the inner part of the pneumatic valve plate for arc, the edge is a plane, this requires each to do a specifications of the pneumatic valve, must be a kind of clamping fixture, otherwise can't press out the required shape. This invisible increases the manufacturing cost of the enterprise.
to this kind of structure is analyzed by finite element technology, in the DN connecting rod pneumatic valve structure of traditional pneumatic butterfly valve plate and add. MPa pressure analysis of the results, we can see that the whole pneumatic valve plate maximum deformation in promulgation and plate, the biggest deformation for at this time. Are connected to the pneumatic valve plate mm, it will make a lot of damage of the pin shaft and shaft sleeve. DN cold wind stove cold wind pipe pneumatic valve damage, The cold wind pipe for pressure. MPa, temperature for ℃, the pneumatic valve damage reason is connected to the pneumatic valve plate of the bent pin, pin shaft self-lubricating bearings is completely crush