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The matters needing attention from starting to end the whole process of dredging
Dredging sand is the construction machinery of underwater earthwork, it is mainly used to dig deeper, widen and clean up existing waterways and ports; the excavation of new waterway, port and canal; dredging dock, dock, shiplock and other hydraulic structures, and the sediment dug into the deep sea or blown into the land-based depressions make. It is an important machine, the cost is also expensive, so when using dredging sand, from start-up to end of work must pay close attention to dig sand
Work trends, pay special attention to the following matters:
1, start digging sand engine idle running after 10 minutes or so, water temperature, oil temperature, oil pressure to meet the requirements of the situation can start production. In particular, the cold winter should pay attention to preheating.
2, start preparation work, the operator first open the dredging vessel operation Cabinet of 24v power total switch. Then through the Dredging boat bridge winch down the bridge and suction sand tube, so that the cutter sink into the water, then start flushing water pump. Then the gear box and the sand pump and then through the operation stage of the combined line switch to make the engine drive the gear box driving sand pump work. Slowly improve the engine to the prescribed speed. However, the speed of the gear box is the lowest engine speed absolutely not allow the engine in high speed situation in the row. In the sand pump suction to the water, pipe outlet, normal water, you can start the cutter use of the left and right transverse move to start production construction. Special attention: Dredging sand in construction production to do a fan movement when positioning piles must not simultaneously inserted into the sediment. The operation is absolutely not permitted. Dredging vessels in the construction of the need for sand pump suspended operation, the gear box to remove the sand pump operation. The rotational speed of the dredge engine must be reduced to the lowest rotational speed before it can be discharged.
3, in the work, dredging vessels operator indoor operators to pass, smell, listen, look, touch, observe the cabin situation. Smell whether there is abnormal sound, listen to see whether the engine monitoring meter is normal. The hydraulic system is leaking oil, the cooling system is leaking, the engine has three leaks. Leaking, leaking oil, leak. Touch the temperature of the motion parts of the magnitude of vibration sensation.
Deck operators also have to pass, smell, listen, look, and observe the deck above. Smell whether there is abnormal sound, listen to see whether the operation of dredging vessels operating room monitor meter is normal, past ship movements. On deck hydraulic system piping and underwater pipelines are leaking oil, etc.
4, the end of the work, to stop the engine through the bridge winch hoist to make the bridge Reamer left the sandy layer, stopping in the water for a period of time to continue pumping. So that the whole sediment pipeline of dredging vessels without sediment, and then reduce the engine rotational speed to remove the sand pump to stop working, and then through the dredging boat bridge winch, lifting the bridge to leave the water, plus insurance. Can stop the engine, shut down the bottom valve, and other valves, cut off the power supply, shut down the windows.