Thermometer factory group, the boiler steam flowmeter installation requirements

Boiler steam flow meter in order to use convenient, battery-powered local display type vortex flowmeter using micro power consumption of new and high technology, using lithium batteries don't run around more than a year, save the thermocouple and display instrument purchase cost of installation, can be in situ show that the instantaneous flow and cumulative flow, etc. Temperature compensation of a bodily form vortex flowmeter with temperature sensor, can directly measure the temperature of saturated steam and calculate the stress, which shows that the mass flow of saturated steam. A body temperature pressure compensation with temperature and pressure sensors, used for gas flow measurement can directly measure the temperature and pressure of gas medium, showing the state of the volume of the gas flow. Thermometer group factory boiler steam flow meter installed correctly is an important part of the protection of the normal operation of instrument, improper installation, light affect the use of the instrument accuracy, or affect the service life of the instrument, even damage the instrument. A, install environmental requirements: 1, as far as possible to avoid high voltage equipment, high-frequency equipment, switching power supply equipment. Instrument of power supply from these devices as much as possible. 2, avoid high temperature heat source and the radiation source. If you have to install, you must have heat ventilation measures. 3, to avoid the high humidity and strong corrosive gas environment. If you have to install, you must have ventilation measures. 4, vortex flow meter should be avoided to install on the strong vibration of pipeline. If you have to install, you must set up at the upstream and downstream 2 d pipeline fastening device, and vibration-proof pad, strengthen the effects of vibration resistance. 5, instrument installation installed indoors, outdoors should pay attention to waterproof, pay special attention to in the electrical outlet should be thermocouple wire bent into a U shape, avoid water along the thermocouple wire into the amplifier shell. 6, instrument installation point should have a plenty of space around, in order to install the wiring and regular maintenance. Two pipe, boiler steam flowmeter installation requirements: 1, the vortex flow meter has certain requirement for straight pipe upstream and downstream of the installation points, otherwise it will affect the medium flow field in the pipeline, affect the accuracy of measurement instrument. Instrument of upstream and downstream straight pipe length requirements as shown in figure ( 3) DN as the instrument of nominal diameter unit: mm, note: regulating valve as far as possible not to install in the upstream of vortex flow meter, and should be installed downstream of the vortex flow meter 10 d. 2, upstream and downstream piping diameter should be the same. If there is any difference, the pipe inner diameter Dp and vortex meter Db table body size, should satisfy the following relationship between 0. 98分贝≤Dp≤1。 5 db, upstream and downstream piping should be with concentric flow meter table body size, not alignment between them should be less than 0. 05 db3, between the instrument and the flange gasket, not protruding into the tube when installation, the inner diameter should be 1 - larger than the table body size 2 mm4, pressure hole, and the installation of the thermometer hole design. Pipe to be tested when need to install the temperature and pressure transmitter, pressure hole should be set in the downstream of the 3 - 5 d, thermometer hole should be set in the downstream - 6 8 d; 5, instrument in on the pipeline can be horizontal, vertical or inclined installation. 6, when measuring gas in vertical piping instrument, gas flow to unlimited. But if the pipe contains a small amount of liquid, in order to prevent liquid from entering the meter tube, airflow should flow from bottom to top, as shown in figure ( 4) 7 a shows, measuring liquid, in order to guarantee the tube filled with liquid, so in either a vertical or inclined pipe installation instrument, should guarantee the direction of liquid flow from the bottom up. If the pipe contains a small amount of gas, in order to prevent gas from entering the instrument measuring tube, the lower part of the instrument shall be installed in the pipeline of 8, measuring, high temperature and low temperature medium heat preservation measures should be paid attention to. Converter internal ( Header inside the shell) High temperature generally should not exceed 70 ℃; Easy to appear converter internal condensation at low temperature, reduce the insulation resistance of printed circuit board, affect the normal work of the instrument.