Precautions for operation of concrete mixing plant

The installation of the mixing plant should be carried out by professional personnel according to the factory manual, and organized for debugging under the guidance of technical personnel. Only after all technical performance indicators meet the requirements and pass the acceptance inspection, can it be put into use.
The equipment such as air compressors, belt conveyors, and concrete mixers that are matched with the mixing plant should be operated according to the requirements.
The pre homework inspection items should meet the following requirements:
(1) There are no foreign objects stuck in the transmission, moving parts, compartment doors, bucket doors, tracks, etc. of the mixing drum and various supporting mechanisms;
(2) The oil level height of each lubricating oil tank meets the regulations;
(3) Open the valve to discharge excessive water from the gas water separator in the gas path system, and open the drain plug of the gas storage cylinder to release the oil-water mixture;
(4) The installation of steel wire ropes and winding of drums for lifting buckets or shovels are correct, the steel wire ropes and pulleys comply with regulations, and the brakes for lifting buckets and shovels are clear and effective;
(5) All bolts have been tightened, and there is no excessive wear on the inlet and outlet valves. The tension of each conveyor belt is appropriate and does not deviate;
(6) All control and display parts of the weighing device are working properly, and their accuracy meets the requirements;
(7) Each electrical device can effectively control the mechanical action, and there is no obvious damage to each contact point and the moving and stationary contacts.
Qualified sand and stone aggregates should be prepared according to the technical performance of the mixing plant, and those with particle sizes exceeding the permitted range shall not be used.
Each part of the unit should be gradually started. After starting, the operation of each component and the indication of each instrument should be normal, and the pressure of oil, gas, and water should meet the requirements before starting the operation.
During the homework process, personnel are strictly prohibited from entering the storage area and under the lifting bucket.
Before starting the mixing drum, cover the compartment lid. During mechanical operation, it is strictly prohibited to touch the hopper or mixing drum with hands or feet.
When the shovel is stuck by an obstacle, it must not be forcibly lifted or used to lift heavy objects. During the material pulling process, no turning operation is allowed.
The concrete mixer shall not be stopped when fully loaded for mixing. In the event of a malfunction or power outage, the power supply shall be immediately cut off, the switch box shall be locked, the concrete inside the mixing drum shall be cleaned, and then the malfunction shall be eliminated or the power supply shall be restored.
All machinery in the mixing plant shall not be overloaded for operation; The operation of the motor should be checked. If abnormal sound or high temperature rise is found, the machine should be stopped immediately for inspection; Do not force operation when the voltage is too low.
Before stopping the mixer, it should be unloaded first, and then the switches and pipelines of each part should be turned off in order. All cement inside the spiral tube should be transported out, and there should be no residual material inside the tube.
After homework, the mixing drum, discharge door, and discharge hopper should be cleaned and rinsed with water, while also rinsing the additive and its supply system. The knife holder and blade of the weighing system should be cleaned thoroughly and the weighing accuracy should be ensured.
During the freezing season, the water pump, additive pump, water tank, and additive tank should be drained of stored water, and the water pump and additive pump should be started and operated for 1-2 minutes
When the mixing plant is transferred or stopped, the materials in the water tank, additive tank, cement, sand, stone storage hopper, and weighing hopper should be drained and cleaned thoroughly. During the transfer, the balance weight of the bar scale head should be fixed, and the sensor should be unloaded.

Precautions for operation of concrete mixing plant

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