Scientific explosions are divided into solid, liquid, and gas explosions according to the state of matter. Nowadays, many industries and units such as petroleum, chemical industry, pharmaceutical, pigment, paint, coal, etc., when producing, concentrating, liquefying and storing flammable gases; or producing, filling, releasing and storing flammable liquids and using these liquids to process, When cleaning objects, the combustible gas or dust that may be generated is mixed with air to form an explosive mixture, making these areas inaccessible to ordinary vehicles.
Explosion-proof forklifts are specially designed and produced for places where explosive gas or dust may be generated, mainly to prevent explosions when the vehicle is running in an explosive gas environment. The following good luck Wang
Forklift rental for everyone to analyze some explosion-proof knowledge about explosion-proof forklifts:
. Conditions for flammable gas explosion
1. Internal conditions: The concentration of flammable gas is within a certain range, and an explosion occurs between the lowest concentration and the highest concentration.
2. External conditions: ignition of arc flash or open flame, ambient temperature above the spontaneous ignition point, and radiation with a certain amount of energy may cause detonation. Specific to the vehicle, it is reflected in: electric sparks; mechanical collision sparks; the temperature of motors, electric controls, brakes, oil pumps, valves and other easy-to-heat parts may cause explosions.
. Explosive gas atmospheres can be divided into three areas according to their degree of danger
Zone 0: A place where explosive gas atmospheres appear continuously or exist for a long time. (Motorized industrial vehicles are not allowed to enter)
Zone 1: A place where an explosive gas atmosphere may appear during normal operation.
Zone 2: During normal operation, an explosive gas atmosphere is unlikely to occur, and if it occurs, it will occur occasionally and only exists for a short time.
At present, the highest level of explosion-proof forklifts at home and abroad can only operate safely in Zone 1 and Zone 2.
. Explosion-proof methods adopted by explosion-proof forklifts
1. Intrinsically safe type: The energy of the circuit is limited, and the spark, arc and temperature generated are not enough to ignite the explosive gas no matter in the normal or short-circuit fault state.
2. Explosion-proof structure of explosion-proof forklift: use isolation measures in structure to isolate electrical appliances from the surrounding environment. Commonly used are: explosion-proof type, increased safety type, positive pressure type, oil-filled type, sand-filled type, pouring type and other forms.
At present, the explosion-proof type of electric explosion-proof forklift is mainly explosion-proof type. The principle is: during normal operation, the parts of electrical equipment that can generate spark arcs are placed in the explosion-proof enclosure, and the explosion-proof enclosure can withstand internal pressure without damage. It can ensure that when the internal flame gas propagates through the gap, the energy is reduced, which is not enough to detonate the gas outside the shell.
