⎝⎛星力捕鱼⎞⎠

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Address: Xiongyi, Jinhe Road, Jinhu County, Jiangsu Province
Lunan
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Industry Information
Application of Radar Level Gauge to Asphalt Level Measurement
2011-9-21 17:26:47

根据温度 液态的沥青介电常数也比较低,一般在3 左右 液态的沥青一般需要用高温来维持, 而且 伴随着高温一般都会有一定的水蒸气; 同时 沥青的特性比较粘,很容易产生一定的挂料的现象。 Generally , the dielectric constant of liquid asphalt is relatively low according to the temperature , usually around 3. The liquid asphalt generally needs to be maintained at a high temperature , and generally has a certain amount of water vapor along with the high temperature. At the same time , the characteristics of the asphalt are sticky and easy Produce a certain phenomenon of hanging materials.
     100 º C 高温的 工作状 ,一般都需要选择PTFE 材质的天线,而不能选择 PPS 的天线;为了防止挂料的影响,可以选择喇叭口 天线;但 水蒸气一般会导致冷凝水的产生, 所以 试验表明,因为杆式天线的有效发射电磁波的面积要远大于喇叭天线( 发射电极只有笔尖大小 ) ,所以 杆式天线对冷凝水的敏感程度要小于喇叭口天线 Under high temperature working conditions higher than 100 º C , you generally need to choose a PTFE antenna instead of a PPS antenna. In order to prevent the influence of hanging materials, you can choose an antenna at the bell mouth ; but water vapor will generally cause condensation. Therefore, experiments show that because the effective area for transmitting electromagnetic waves of a rod antenna is much larger than that of a horn antenna (the transmitting electrode is only the size of a pen tip ) , the sensitivity of the rod antenna to condensed water is smaller than that of a horn antenna . 沥青的介电常数较低, 因此 在天线所产生的少量挂料一般都可以被雷达液位计的电磁波穿透 Because the dielectric constant of asphalt is low, a small amount of hanging material generated in the antenna can generally be penetrated by the electromagnetic wave of the radar level gauge . As the hanging material of the asphalt medium is relatively viscous, the effect of using a cleaning device is not very obvious, so it is not recommended to use a cleaning device for measuring asphalt.

      来说 ,可以采用带喇叭口的LR200 ,喇叭口大小应 该大于 DN150 而对于温度较高,冷凝水现象比较明显的工艺 来说 ,可以采用全PTFE 的杆式天线为 好: 采用不锈钢屏蔽段的PTFE 天线对口径较小的安装立管的屏蔽效果较好,但是屏蔽长度如果选得太短 的话 没有办 法延长 Therefore, for asphalt applications with severe mixing and hanging materials in the storage tank, LR200 with a bell mouth can be used , and the size of the bell mouth should be larger than DN150 . For processes with higher temperature and obvious condensation water , It is better to use a full PTFE rod antenna : a PTFE antenna with a stainless steel shield section has a better shielding effect on a small-diameter mounting riser, but if the shield length is too short , there is no way to extend it . 采用全PTFE 的天线的屏蔽段长度可以根据安装立管的长度自由方便地延长,但是在小口径 也就是小于等于 DN80 的安装立管会对天线的工作产生影响。 The length of the shield section of the antenna using full PTFE can be freely and conveniently extended according to the length of the mounting riser, but the installation of the riser in a small diameter, that is, DN80 or less, will affect the antenna's work. 的时候 ,对安装立管的口径和长度提出要求。 Therefore, when installing the radar level gauge , it is better to ask for the diameter and length of the riser.

The radar level gauges sold by Jiangsu Dongxiang Instruments include: guided wave radar level gauges, intelligent radar level gauges, etc.