Many companies want to use explosion-proof equipment in a hazardous gas environment to ensure the safety of the working environment, but they do not know how to choose the type of explosion-proof equipment. This article according to the principle of explosion-proof, environmental characteristics, characteristics of equipment, a simple description of how to choose the right type of explosion-proof equipment based on their own environment in the complex types of explosion-proof.
According to how to choose explosion-proof measures (on)
The principle of explosion protection must be known before A selection.
Select the appropriate explosion-proof instrument and explosion-proof electrical equipment. The standard structures include flameproof, increased safety, positive pressure, sand-filled, intrinsically safe and oil-filled. Essential to prevent or minimize the possibility of leakage of flammable substances.
First, the flameproof electrical equipment has the ability to withstand the explosive pressure of the internal explosive gas mixture, and to prevent the internal explosion of bristle bristle shells spread around the shell of electrical equipment, the sign is: Exd
2. Increased safety electrical equipment will not generate arcs, sparks, or high temperatures that can ignite explosive mixtures under normal operating conditions. Measures are taken to improve safety margins to prevent arcing, sparks or arcing under normal and recognized overload conditions. High temperature electrical equipment. Its symbol is Exe.
Third, the dust explosion-proof electrical equipment is designed and manufactured according to the specified conditions, so that the enclosure can prevent the entry of combustible dust or the amount of entry will not prevent the safe operation of the equipment, the internal accumulation of dust is also not easy to produce ignition, so as to ensure that the use will not cause the surrounding explosive mixture Hand exploded electrical device.
Fourth, positive pressure type electrical equipment keeps the pressure of the internal protective gas higher than the surrounding, so as to avoid the explosive mixture entering the enclosure, or to make enough protective gas pass through the enclosure so that the concentration of the internal explosive mixture falls below the lower explosion limit. The sign is "P"
V. Intrinsically safe equipment Internal circuits Under the specified conditions, the EDM and thermal effects generated under normal operation or in the specified fault conditions will not ignite the explosive mixture. "I"
Sixth, the oil-filled type immerses the entire part of the electrical equipment in the protective liquid so that the equipment cannot ignite the explosive gas on the liquid surface or outside the housing. "O"
7. An explosion-proof type of a sand-filled electrical device that completely encloses a fixed conductive member capable of igniting an explosive gas in a filler material to prevent ignition of an external explosive gas atmosphere. (q)
and many more.
According to how to choose explosion-proof measures (on)
The principle of explosion protection must be known before A selection.
Select the appropriate explosion-proof instrument and explosion-proof electrical equipment. The standard structures include flameproof, increased safety, positive pressure, sand-filled, intrinsically safe and oil-filled. Essential to prevent or minimize the possibility of leakage of flammable substances.
First, the flameproof electrical equipment has the ability to withstand the explosive pressure of the internal explosive gas mixture, and to prevent the internal explosion of bristle bristle shells spread around the shell of electrical equipment, the sign is: Exd
2. Increased safety electrical equipment will not generate arcs, sparks, or high temperatures that can ignite explosive mixtures under normal operating conditions. Measures are taken to improve safety margins to prevent arcing, sparks or arcing under normal and recognized overload conditions. High temperature electrical equipment. Its symbol is Exe.
Third, the dust explosion-proof electrical equipment is designed and manufactured according to the specified conditions, so that the enclosure can prevent the entry of combustible dust or the amount of entry will not prevent the safe operation of the equipment, the internal accumulation of dust is also not easy to produce ignition, so as to ensure that the use will not cause the surrounding explosive mixture Hand exploded electrical device.
Fourth, positive pressure type electrical equipment keeps the pressure of the internal protective gas higher than the surrounding, so as to avoid the explosive mixture entering the enclosure, or to make enough protective gas pass through the enclosure so that the concentration of the internal explosive mixture falls below the lower explosion limit. The sign is "P"
V. Intrinsically safe equipment Internal circuits Under the specified conditions, the EDM and thermal effects generated under normal operation or in the specified fault conditions will not ignite the explosive mixture. "I"
Sixth, the oil-filled type immerses the entire part of the electrical equipment in the protective liquid so that the equipment cannot ignite the explosive gas on the liquid surface or outside the housing. "O"
7. An explosion-proof type of a sand-filled electrical device that completely encloses a fixed conductive member capable of igniting an explosive gas in a filler material to prevent ignition of an external explosive gas atmosphere. (q)
and many more.
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