About the new design in the application of electromagnetic flow meter scale explosion-proof circuit

Abstract: about the new design of explosion-proof circuit in the application of electromagnetic flow meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. For mine electrical products, it is very important for the explosion protection safety. At present, the types of explosion-proof electrical products are mainly composed of flameproof and intrinsically safe; And only intrinsically safe equipment can be used in dangerous places. Mine intrinsically safe product nature to do. More flow meter manufacturers choose model price quote you are welcome to inquire, here is about the new design of explosion-proof circuit in the application of electromagnetic flow meter scale article details. For mine electrical products, it is very important for the explosion protection safety. At present, the types of explosion-proof electrical products are mainly composed of flameproof and intrinsically safe; And only intrinsically safe equipment can be used in dangerous places. Intrinsically safe mine intrinsically safe products to do performance test, the intrinsically safe spark test is one of the most important inspection item zui. When the circuit occurs on and off, releases energy in the form of a spark. Energy is greater than a certain critical value, will ignite explosive gas mixture, so as to explode. The Ann is to produce the spark energy control circuit design, so as to realize the intrinsic safety of circuits. Intrinsically safe circuit for work in the normal and fault conditions must be safe, the edm are not enough to ignite the surrounding environment of explosive gas mixture. Electromagnetic flowmeter intrinsically safe excitation circuit electromagnetic flow meter transducer excitation current is the spark of hazards, electromagnetic flowmeter to be used for downhole, the excitation circuit is first meet the essential safety requirements. Electromagnetic flow meter transducer electrical part is composed of two coils, the main electric parameter is the resistance and inductance, resistance of 40 - 60Ω （ Two coils in series) , inductance is 100 - 300 mh, the inductance is hazards. When a current flows through the inductor, inside the coil creates a magnetic field, magnetic field energy storage, when circuit disconnection, the energy stored in the coil will be released in the form of a spark, should this must absorb or discharge coil storage can to reach the requirements of intrinsically safe. On both ends of the coil parallel mio flow branch to discharge coil magnetic field can be stored, reduce the spark energy when on and off. In normal state, it shall not affect the circuit work, when circuit disconnect, it will discharge circuit and coil, voltage clamping pressure drop in the diode to the positive ( 0. Around 7 v) 。 However, simple mood flow diode is only applicable to dc and unidirectional current situation. In order to avoid the electrode polarization phenomenon and eliminate the noise interference, electric, electromagnetic flowmeter with low frequency rectangular wave excitation, so the excitation signal is periodic bidirectional current, therefore, the traditional common diode can meet applications. Here, we use a new type of electromagnetic flowmeter of transient voltage suppressor, is in stabilivolt technology developed on the basis of a new type of electronic components, when the instantaneous high pressure impact on both ends, it can sharply reduce the impedance at high rate for conducting state, absorption current, discharge energy. Its characteristic is: clamping precision, fast response speed, can discharge in a strong, zui important, it can realize two-way clamping discharge, meet the requirements of our two-way excitation, will not affect the normal work of the electromagnetic flowmeter and inhibit spark. Effectively restrain the energy leakage. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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