Explosion proof bridge crane is a kind of special lifting crane. It is mainly applied to hot, smelting, smoky, high temperature environment. Buy explosion proof bridge crane for factory, this can ensure security and efficiency.
AIMIX Group, a reliable crane supplier in China, provides cheap overhead explosion-proof crane with top quality. Choose us and buy low price explosion proof bridge crane for coal mine! Explosion proof hoist can be used together with explosion proof crane to expand operation area!
With strict producing standard, durable material, good performance, our overhead explosion-proof crane has been exported to many countries! Its explosion-proof technology mainly includes mechanical explosion-proof technology and electric explosion-proof technology.
- Load capacity: 1-20t
- Span: 7.5-31.5m
- Lifting height: 6-30m
- Lifting speed: 0.33-8m/min
- Hoist running speed: 20m/min
- Crane running speed: 20m/min
- Explosion-proof grade: ExdⅡBT4、ExdⅡCT4
- Work duty: A3, A4
What are principles of explosion proof bridge crane?
Overhead crane works and produces electrical conduction and mechanical friction, which leads arc, spark and overheating. Thus it is necessary to take some measures to avoid arc, spark and overheating in flammable and explosion condition. Even if producing arc, spark and overheating, it can’t ignite explosive mixture. This is the basic design principle of explosion-proof crane. This kind of crane is composed of metal structure, explosion-proof electric device, explosion-proof parts connecting, mechanical or hydraulic transmission, and kinds of mechanism, components and safety devices.
What are electrical safety devices and their functions?
Lighting switch box, it is the power source of work lighting and ringing.
Travel-limit switch, it is used for limiting the machine work in a certain range, so as to avoid accidents.
Emergency switch, it is installed at the side of cabin, under the condition of accidents or emergency, it is convenient to cut off the power of controlling circuit.
Door and hatch safety switch, it is installed on the door and hatch. It can avoid the accidents caused by power transmission blindly when someone ups or downs the crane or walks on the platform.
Fuse protector, it is used to protect short circuit.
Overcurrent relay, it can protect the overload and short circuit of main circuit and electric motor.
Daily crane safety checkout
Ensure the bridge and trolley motor brakes operate properly.
Check that there is little or no hook drift when releasing controls in the up or down position.
Check that the trolley and bridge are on-track and functioning smoothly.
Ensure there are no loose items on the crane that could fall
Check for oil leaks.
Ensure a working fire extinguisher is available if needed.
Check that air or hydraulic lines are in working condition.
And, ensure all below-the-hook devices are in good condition.
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