|信息来源： 液位变送器 | 2020-05-29 点击量： 2300|
插人式单法兰液位变送器还是平法兰液位变送器归根结底都属于差压变送器，其测量液位的原理都是通过公式P=pgh计算出介质在满液位时的压强， 然后将变送器的量程负迁移后通过差压计算容器内液位的高度。所以，只有压力测量准确了，液位才有可能是正确的。插人式单法兰液位变送器的优点是在黏度高，颗粒大的介质中不易发生堵管现象， 但在应对流体冲击较为严重的环境中还是显得有些乏力
The second industrial revolution is to let human beings enter the mechanical age. Its energy is mainly oil. Up to now, coal and oil are still the main energy sources in the world. The discovery of large oil fields in Qingyang, Gansu Province, has a reserves of 5 billion tons and a total resource value of more than 4 trillion. The discovery of large oil fields in Gansu Province has laid a solid foundation for the development of China's oil industry, which provides a solid foundation for China to import oil. Lanzhou City, Jiayuguan City, Jinchang City, Baiyin City, Tianshui City, Wuwei City, Zhangye City, Pingliang City, Jiuquan copy City, Qingyang City, Dingxi City, Longnan City and many other areas have a wide range of oil field exploitation directions, and the large oil field found in Qingyang City in 2019 will be widely used in the near future
Based on the northwest, Xi'an Huaheng instrument manufacturer, which develops the sense of mission of northwest industrial automation, now has three major scientific and technological strengths, one is the technology of fully isolated intelligent circuit processing unit, the other is the manufacturing technology of metal capacitance sensor, and the third is the multi parameter technology of full series throttling devices.
It has more than 40 years of technology advantages and application scope in outstanding liquid level / flow transmitter
Single flange liquid level transmitter is a kind of field transmitter installed directly on the channel or vessel. The single flange liquid level transmitter can accurately measure the liquid level and density of various vessels, which can be divided into two types: flat flange and plug-in flange. Because the isolation diaphragm is in direct contact with the liquid medium. It is not necessary to lead the positive pressure side out with a pressure pipe. This method is applicable to the measurement of high temperature, high viscosity, easy crystallization, easy precipitation, strong corrosion and other media.
There are two kinds of single flange transmitters: plug-in type and flat flange type. The measurement principle and installation mode of the two transmitters are basically the same, but different process conditions have a great influence on the measurement data of the transmitter. Taking the flash drum of steam condensate in salt industry as an example, a is the inlet of steam condensate, B is the outlet of flash steam, C is the installation position of single flange transmitter, D is the drainage pipe of steam condensate, and E is the pressure tapping point on the negative pressure side of single flange transmitter.
Plug in single flange liquid level transmitter or flat flange liquid level transmitter are all differential pressure transmitters in the final analysis. The principle of measuring liquid level is to calculate the pressure of medium at full liquid level through the formula P = pGH, and then calculate the height of liquid level in the vessel through differential pressure after the range of transmitter is negatively shifted. Therefore, only when the pressure measurement is accurate can the liquid level be correct. The advantages of plug-in single flange liquid level transmitter are that it is not easy to block the pipe in the medium with high viscosity and large particles, but it still appears to be weak in the environment with severe fluid impact
The single flange liquid level transmitter also needs to continuously measure the interface and density, which should be used in the occasions with high requirements of sanitation and cleaning. For example, in the production of food, beverage and medicine industry, it is not only required that the contact medium part of the transmitter meet the health standard, but also should be flushed to prevent cross contamination of different batches of media. It can eliminate the leakage of the impulse pipe and pollute the surrounding environment. It can avoid the tedious work of replenishing the isolation liquid frequently because of the instability of the measurement signal when using the isolation liquid.
From the reactions of the countries in the Middle East and the United States, with the consumption of world oil resources, in the future when the oil is in short supply, there may be a greater battle for resources. In this context, the more domestic oil reserves, the better. In a word, oil is in hand, and I have it all over the world. The single flange liquid level transmitter also needs to measure the interface and density continuously. It should be used in the places with high requirements of sanitation and cleanness. It can also be used