Vibration management of nuclear magnetic resonance equipment
Vibration will affect the image quality of NMR. Steady state vibration and transient vibration can affect NMR. Steady state vibration usually refers to the vibration caused by motors, pumps, air conditioners, etc. Transient vibration usually refers to the vibration caused by vehicles, pedestrians, door opening and closing, etc. Therefore, the site of NMR machine room should be as far away from the vibration sources such as parking lot, highway, subway, train, water pump and large motor as possible.
In order to deal with the vibration problem of nuclear magnetic resonance equipment, after investigation, testing, analysis and research, it is necessary to take active and passive vibration isolation measures. Active vibration isolation is to take vibration isolation measures for surrounding vibration sources that may affect the NMR equipment, so that the vibration generated by these fixed vibration sources can be effectively isolated. Passive vibration isolation is to take vibration isolation measures on the floor or foundation of nuclear magnetic resonance equipment to control the impact of external vibration on nuclear magnetic resonance equipment.
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What is the internal structure of plastic coated pneumatic butterfly valve
The most fundamental tool that today's increasingly prosperous technology relies on is the transmission of information, which cannot be transmitted without lines. Some people may say that there are electromagnetic waves, yes, but electricity generates magnetism. The plastic coated pneumatic butterfly valve is the basic equipment for electric transmission. What is the structure of this pneumatic butterfly valve? It is mainly divided into internal structure and external structure.
Internal structure: the internal structure is the inner layer of this pneumatic butterfly valve. The inner layer needs special treatment. First of all, the material selection of the inner layer is exquisite. The inner layer of plastic coated pneumatic butterfly valve shall be made of the same material as the outer layer. Among these insulated metals, one called stainless steel is easy to use, fair in price and effective in use. In addition, galvanized hoses will also be used, and finally special insulation treatment will be taken.
Second: external structure. The outside is the outer layer. Literally, we can find that the outer layer of plastic coated pneumatic butterfly valve is actually just a layer of plastic. But this is not ordinary plastic, but PVC plastic, which has the function of anti ultraviolet and anti-aging. Of course, it also has the function of insulation. This pneumatic butterfly valve is also very popular because of its insulation characteristics, which can maintain circuits and cables.