Maintenance and Maintenance of Instruments and Meters in Winter

Abstract: The maintenance and maintenance information of instruments and meters in winter is provided by the excellent manufacturers of flowmeters and flowmeters. In winter, when the measured medium is transmitted to the transmitter through the measuring pipeline, the phenomenon of freezing, solidification and precipitation of crystallization often occurs when the ambient temperature is too low. normal operating temperature range. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the maintenance and maintenance of instruments in winter. In winter, when the measured medium is transmitted to the transmitter through the measuring pipeline, the phenomenon of freezing, solidification and precipitation of crystallization often occurs when the ambient temperature is too low. The normal working temperature range directly affects the accuracy of the instrument's measurement display. For this reason, the instrument and the instrument measurement pipeline must be antifreeze treatment. The objects that need heat tracing and insulation mainly include the transmitter installed in the instrument incubator, the external float type liquid level transmitter or other forms of open-air installed liquid level. Transmission unit, testing pipeline and measuring pipeline of pressure, differential pressure, flow and other instruments. Avoid such accidents through model selection or other methods. The measures usually taken are: model selection, heat preservation and heat tracing, maintenance (point inspection, sewage discharge), etc. 1. Type selection measures Select the instrument with thermal insulation device. The differential pressure transmitter puts forward the thermal insulation and antifreeze requirements of the instrument according to the type of use of the instrument and the geographical location to be installed, and then submits it to the manufacturer for processing. In some places in the north, the temperature difference between day and night is too large, and it can reach more than -20 degrees at night. The choice of thermal insulation and heat tracing, maintenance (point inspection, sewage) and other methods are the solutions to antifreeze. 2. Thermal insulation measures Use thermal insulation materials to keep warm, that is, use thermal insulation materials to wrap the parts of the instrument that are easy to freeze or are afraid of freezing. When winter comes, it is necessary to check and discharge frequently to prevent damage to the thermal insulation materials of the packaging. 3. Heat tracing measures 1. Steam tracing measures That is, the use of pipe steam heating to keep warm. Check whether the steam insulation pipeline is unblocked or blocked before supplying steam with insulation in winter. It is best that the steam is open for 24 hours, not too hot, and sometimes it is necessary to adjust the amount of heat preservation steam according to the change of weather temperature, so as to prevent the temperature from being too high and causing the condensate in the pressure pipe of the transmitter to vaporize, which will affect the work of the transmitter or be caused by the temperature. If it is too low, the condensate in the pressure pipe of the transmitter will freeze and affect the smooth operation of the transmitter. 2. Insulation and protection box measures a. The electric heating tube heat-tracing insulation box is composed of three parts: the box body, the heater, and the instrument bracket. Its structure is the same as that of the protection box. The structure is as shown in the figure. The electric heating device is composed of electric heating tube and temperature controller. There is a socket on the side of the box. . Through repeated work, the temperature in the box can be maintained within a certain range. b. Steam pipe heat tracing insulation box. The heat tracing pipe is made of metal pipe into an S-shaped structure. The upper and lower parts of the box are welded with welded through-plate joints and the heat tracing pipe. The circulation in the lumen achieves the purpose of heating. Heat tracing pipe materials are generally divided into two types, namely copper pipe and seamless steel pipe (carbon steel). c. Add another layer of thermal insulation cotton to the key instrument box, and add glue to seal the door of the incubator box and the inlet and outlet pipelines, which can achieve the effect of thermal insulation and antifreeze of the instrument system. 3. Electric heating belt measures Electric heat tracing insulation technology is a new type of heating technology that directly converts electric energy into heat energy. Install insulation cable, wrap the heating cable on the instrument, or stick it inside the instrument cabinet (but pay attention to the length of the heating cable used, and it should be economical and moderate). It is suitable for heat tracing, anti-freezing and heat preservation of pipelines, valves, shock-resistant pressure gauges, differential pressure transmitter pump bodies, or single-phase constant-power electric heating belts to maintain the process temperature of instrument pipelines. The calorific value per unit length is constant, and the output power is not affected by the ambient temperature. The length of use is proportional to the power. It can be arbitrarily spliced ​​during installation, but there must be a heating section (that is, at least 2.5m). ground. It is mainly used for antifreeze and heat preservation of various pipes and instruments, and the maximum maintenance temperature is 150 °C. Note: Heat tracing and insulation of liquid pipelines that require strict temperature control (temperature controllers must be used). The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Maintenance and Maintenance of Instruments and Meters in Winter'

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