ã€China Aluminum Industry Network】 1. Introduction of the instrument in the aluminum extrusion production, the usual practice is to use rapid thermocouple contact to detect the temperature of the aluminum, and the extrusion profile is always moving, the detection element must follow the profile If you exercise together, you cannot maintain on-line monitoring, and different human operation methods are used for detection. The profiles are cooled immediately after they are ejected. This results in large deviations in the detection temperature. Therefore, it is difficult to obtain accurate temperature and speed matching. Temperature detection is divided into contact and non-contact two categories.
2. When measuring the details of the promotion in the same industry, after taking into account the measured infrared radiation energy, emissivity, and measured wavelength of the aluminum material, accurate temperature is calculated through special compensation calculations. The instrument default algorithm is its special compensation calculation software. The optical system collects the infrared radiation energy and emissivity of the band measured by the target in the field of view, and then converts the photodetector and converts it into a corresponding electrical signal. The signal passes through the amplifier and the signal processing circuit, and is converted into the temperature value of the measured target after being calibrated according to the algorithm and the target emissivity of the meter.
3. Details of the process requirements As the extrusion speed increases, the profile extrusion temperature will increase significantly. When the temperature exceeds a certain value, there will be a variety of title topics for the aluminum structure and surface quality. Therefore, aluminum must be readily available. The material outlet temperature is monitored and tested to ensure a better match between extrusion yield and profile quality. Usually in the extrusion production of aluminum, the larger output is mainly determined by the extrusion speed, and the quality of the profile depends on the extrusion temperature of the profile.
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The installation is as follows.
1. Installation Steps
a) Choose correct installation site, taking installation area, pipeline, transmitter location &
valve location into consideration;
b) Install the meter according to direction mark on sensor;
c) Install the sensor & transmitter on pipeline;
d) Connect transmitter & sensor with 9-pin cable;
e) Start.
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone, out of touch with any other device. There must be 3 times the size of sensor between 2 sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold, especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and transformer, better 5m at least. Such device influences the performance of drive coil and pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
e) Make sure Ex-mark meet application requirements if in hazardous area.
f) Build a sunshade if the meter is under direct solar radiation. g) Keep the meter from corrosive liquid.
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Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeters.com