Explosion-proof forklifts are used in special application places, so everyone should first understand the characteristics of explosion-proof forklifts themselves and the characteristics of the explosion-proof forklift operation area.
1. First, in the explosion risk area where it is confirmed that there are flammable substances, various ignition sources of the forklift itself can be strictly controlled.
2. Secondly, while appropriately controlling the ignition source of the forklift, the gas detection system can be used to detect the gas concentration in the surrounding environment of the forklift. When the concentration reaches a certain ratio of its lower explosion limit, the hydraulic forklift starts to alarm and eventually stops automatically, achieving the purpose of safe operation. To ensure the safe operation of the forklift, the ignition source must be effectively controlled, including:
(1) It is necessary to eliminate static electricity that may be generated during the operation of the vehicle and prevent the outer side, tail and fork of the vehicle from catching fire due to collision.
(2) Reduce the exhaust temperature of the diesel engine, which is as high as 300-500℃, to below the specified temperature group (such as less than or equal to 135℃℃)
(3) The diesel engine inhales flammable gas or steam when it is inhaled, causing overspeed and loss of control.
(4) When the forklift has abnormal operating conditions such as high water temperature, exhaust temperature, oil temperature and surface temperature, the diesel engine should be able to shut down automatically in time.
(5) When the diesel engine is normally turned off or unexpectedly explodes, the flame will be backfired through the intake system.
(6) The exhaust flame and sparks of the diesel engine are transmitted to the surrounding atmosphere.
In summary, explosion-proof forklifts must prevent leakage, sparks, etc., so explosion-proof forklifts must be specially treated. The difference between explosion-proof forklifts and ordinary forklifts is mainly in the circuit, which has high requirements for the circuit, especially the motor, such as the travel motor, steering motor, hydraulic lifting motor. The motor will generate sparks when it rotates. In some special places, there will be risks, so special protection and isolation are stopped. Or it is sealed. Full shielding treatment is stopped. Some use AC motors. Because AC motors do not have sparks when working, they are relatively safe. In the connection between the wires. Special treatment has been done before protection is stopped.
Therefore, some relatively dangerous places have very high safety requirements, such as factories with a lot of dust, gas stations, or some electronic factory workshops that are very sensitive to electronic interference. Explosion-proof forklifts must be used instead of ordinary internal combustion forklifts or electric forklifts.
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