Recently, a very badly tragedy happened in Yunan Province, south of China. A road roller ran out of control and rolled into a valley. The two persons in it were dead
The tragedy reminds me of another road roller accident happening two months ago in Hangzhou, which also caused one death. Given that the control system was safe enough, all these tragedies should have been avoided. It is high time that the manufacturers invented a new safety control system to guarantee people’s life. To be specific, this new system should have at least the following advantages:
1. Complete safety is provided for the operator in that, unless he is in control of the machine and is holding the dead man’s lever, the machine cannot operate.
2. By integrating the engine shut-down and the vibrator clutch, it is not possible to leave the machine unattended and vibrating. Such a condition can be particularly dangerous when reversing down a gradient.
3. By shutting the engine down automatically to idling speed, wear on the machine is reduced, fuel consumption is reduced, there is less environmental noise, and the possibility of cavitations in the hydraulic pump at low engine revolutions is eliminated.
4. Operation of the dead man’s handle is completely independent of the pump swash position and it is not therefore necessary to return the pump to neutral when starting off after an emergency stop as with some systems.
5. It is possible, as hereinbefore described, to use the same means for lifting off or releasing the brake when towing the machine whilst still retaining the safety of the dead man’s handle.
6. Easier starting–machine is completely off-loaded and the engine governor is set for high speed on start-up.
I give all my best wishes to the road roller drivers and hope no more accident would happen in the world.
Tags: accidents, Road Roller, safety system
good post!!
Safety is very important.
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