A pair of detection electrodes is installed on the vertical tube wall of the fire water flowmeter. When the conductive liquid moves along the axis of the measurement tube, the conductive liquid cuts the magnetic field lines to generate an induced potential. This induced potential is detected by two detection electrodes, and the magnitude and flow rate In proportion. In addition to the measurement of the volumetric flow of general conductive liquids, it can also be used to measure the volume flow of strong liquids such as strong acids, strong bases, etc., and even liquid-solid suspensions of slurries such as mud, pulp, and pulp. Fire water pipeline meter application field: 1. Water supply and drainage 2. Water conservancy and water resources 3. Petroleum and chemical industry 4. Energy-saving monitoring and water-saving management 5. Heat measurement and heat balance 6. Metallurgy, mining 7. Papermaking and hull manufacturing 8. Heating and power generation 9. Food and medicine 10. Flow inspection, flow tracking and acquisition  Holographic Thermal Lamination Film Holographic Thermal Lamination Film,Iridescent Thermal Laminate Film,Prismatic Holographic Lamination Sheet,Holographic Lamination Film JIANGYIN HONGJU NEW MATERIALS CO.,LTD , https://www.hongjuspecialfilm.com
According to the provisions of Article 11.0.4 of the "Technical Code for Fire-fighting Water Supply and Fire Hydrant System" GB50974-2014 standard, a high-level fire-fighting water tank outlet pipe shall be provided with a flow switch or a pressure switch signal to directly start the fire-fighting pump. As the new standard GB50974-2 stipulates, the previous Due to the loss of the weak current signal, it affects the reliability of the pump, so the fire hydrant box button has a low necessity to start the fire pump, and the fire hydrant button pump has a large investment, so the fire hydrant button should not be used as a direct pump signal and can only be used as an alarm. signal. Second, GB50974-2014 standard 11.0.4 also stipulates that the signals that directly start the fire pump are the flow switch and the pressure switch, and the reason is high reliability. The reliability of the water flow indicator is poor; the probability of malfunction is high; there is a hysteresis in the water level signal of the high water tank; this signal can only be used as an alarm signal. The provisions of the provisions of the flow switch and pressure switch for the fire pump direct pump signal, the flow switch is set within a certain range of flow values, when the high water tank level dropped to a certain pressure, assisted by the pressure switch to start, so that can achieve direct pump double insurance . Interlocking can also be achieved. In order to reduce malfunctions, flow switches and pressure switches (when the water level in the tank or the regulated pump cannot support the fire-fighting water when the fire alarms, the pressure of the outlet pressure of the high-stage tank drops by a set value, the pressure switch acts) simultaneously acts as a direct start pump. Reliable measures. The flow switch and pressure switch are usually installed on the outlet pipe of the high level water tank. The flow switch is operated first and the pressure switch is actuated to realize the double insurance of the direct start pump. Therefore, a “high level tank flow control direct start fire pump device†should be set. The fire water flow meter is an inductive instrument for measuring the volume flow of the conductive medium. According to Faraday's principle of electromagnetic induction, a pair of detection electrodes are installed on the wall of the pipe perpendicular to the axis of the measuring tube and the magnetic flux, when the conductive liquid is along the axis of the measuring tube. During exercise, the conductive fluid cuts the magnetic field lines to generate an induced potential. This induced potential is detected by the two detection electrodes and the magnitude is proportional to the flow rate. In addition to measuring the volumetric flow rate of common conductive liquids, fire water flow meters can also be used to measure the volume flow of strong liquids such as strong acids, strong bases, etc., and even liquid-solid suspensions of slurry such as slurry, pulp, and pulp.