1. The necessity of explosion protection
As a kind of logistics handling, loading and unloading, and stacking machinery, explosion-proof trucks are used in more and more fields and places. However, in many industries and units such as petroleum, chemical, pharmaceutical, paint, coal, national defense, etc., when producing, concentrating, liquefying and storing and transporting combustible gases; or producing, filling, releasing, storing and transporting combustible liquids and using these When liquid handling and cleaning objects, the combustible gas or dust that may be generated is mixed with air to form an explosive mixture, which makes these areas inaccessible to ordinary forklifts. Explosion-proof trucks are specially designed and produced for places where explosive gas or dust may be generated.
2. Explosion-proof principle of explosion-proof truck
The measures and principles of explosion-proof electrical equipment mainly include the following
1. Flameproof
When the equipment is in normal operation, the parts that can generate sparks and arcs are placed in the flameproof enclosure. The flameproof enclosure can withstand the internal explosion pressure without loss, and can ensure that the internal flame gas propagates through the gap, reducing the energy, which is not enough Detonate the gas outside the shell.
2. Increased safety
During normal operation, there will be no arcs, sparks and dangerous high temperatures. Further protective measures are taken in the structure to improve the safety and reliability of the equipment.
3. Positive pressure type
Keep the pressure of the internal protective gas higher than the surroundings to prevent the explosive mixture from entering the shell or enough protective gas to pass through the shell, so that the concentration of the internal explosive mixture will drop below the lower explosive limit.
4. Intrinsically safe
Under the specified conditions, the electric sparks and thermal effects produced by the internal circuits of the equipment under normal operation or specified fault conditions cannot ignite the explosive mixture.
5. Pouring type
It will not be able to produce an arc, spark or high temperature part encapsulation that ignites the explosive mixture, so that it cannot ignite the surrounding explosive mixture.
