Under what conditions do explosion-proof forklifts need

Why should the vehicle be explosion-proof? For the processing, storage and transportation of flammable gases, vapors, and dust, forklifts are the most widely used material transfer tool, including transporting materials to processing sites, transporting products to storage sites, and loading risky goods on vehicles. In these processes, some operational incidents may occasionally occur, such as goods accidentally falling or being punctured from the forks, forklifts hitting stacked goods, pipelines or other equipment, causing flammable substances to leak, evaporate and dispersion. In addition, during the normal processing of combustible substances (such as material filling, discharge, destruction), leakage, transpiration and dispersion are inevitable. Once these flammable substances are mixed with air, they form an explosive mixture. When the concentration reaches the blasting limit and meets suitable incineration energy, it will cause combustion or explosion. Reason: Diesel and battery vehicles that transfer flammable substances may be the cause of the explosion. This is not an assumption, but a reality. Many blasting and fires that occurred in petroleum, chemical, paint, pharmaceutical, and ordnance occupations were determined to be non-explosion-proof vehicles. It has become an indisputable reality that unprotected ordinary vehicles can cause accidental blasting. Use places of explosion-proof forklifts: explosion-proof vehicles can be widely used in petroleum, chemical, pharmaceutical, textile, military, paint, pigment, coal and other industrial sectors and ports, railways, freight yards, warehouses and other places containing explosive mixtures for loading, unloading and stacking And transfer operations. ◆Places where flammable gases are produced, concentrated, liquefied, and stored and transported; 　　◆Places where flammable liquids are produced, filled, released, stored and transported, and where these liquids are used to treat and clean workpieces; 　　◆Places where rubber and plastics are made and processed; 　　◆ Places where explosive dust, combustible conductive dust, combustible non-conductive dust, and combustible fibers are present during processing, destruction and storage. Such as metal, medicine, resin, plastic product workshop, explosives factory. Risk level: The risk area is divided into several zones according to the frequency, duration and risk of the explosive mixture. During this period, the blasting gas risk area is divided into zone 0, zone 1 and zone 2.　　 Zone 0: A place where explosive gas mixtures appear one after another or exist for a long time.　　 Zone 1: A place where explosive gas mixtures may be present during normal operations.　　 Zone 2: A place where explosive gas mixtures are unlikely to be present during normal operations, and even if they are present, they will occasionally exist for a short time.　　The blasting dust risk area is divided into 10 and 11 areas.　　 10th zone: a place where explosive dust mixtures appear one after another or exist for a long time.　　11 District: A place where the accumulated dust is accidentally raised and a mixture of explosive dust is present for a short time. Blasting grade: Under standardized experimental conditions, the blasting gas mixture is divided into three levels: IIA, IIB, and IIC according to the maximum experimental safety gap or the minimum ignition current ratio. IIC level (such as water gas, acetylene) has the largest detonation capability, IIB level (such as civil gas, ethylene, dimethyl ether), and IIA level (such as ethane, propane, toluene, gasoline) with the smallest detonation capability.　　 Explosive dust (including fiber) is divided into four categories according to its physical properties: 　　 1. Explosive dust: such as aluminum, zinc, aspirin and other dust.　　 2. Combustible conductive dust: such as graphite, coke, coal and other dust.　　 Three, combustible non-conductive dust: such as polyethylene, dyes and other dust.　　 Fourth, combustible fibers: such as hemp fiber, wool fiber, etc. Fundamental protection methods for vehicles There are six basic protection methods for forklift explosion protection: 　　 One, install flame arresters and exhaust spark eliminators in the intake and exhaust systems of diesel engines.　　 2. Control the surface temperature of the vehicle and the exhaust temperature of the diesel engine so that it is not higher than the temperature group value of the explosion-proof lithium pallet truck regulations.　　3. starting motors, motors, batteries, switches and meters and other electrical components adopt protective measures to eliminate or control arcs and sparks.　　4. Anti-static belts, tires, non-metal electric fans, and anti-collision sparks for forks and car bodies are adopted.　　 5. Use independent automatic control system for over-temperature, over-speed and leakage protection.　　 6. Effectively monitor the concentration of explosive mixture in the work area.
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