How Are Concrete Mixing Plants Produced?

 I. Comprehensive inspection before operation
1. Equipment hardware inspection: Before starting the machine, the operator should carefully inspect a series of accessories of the mixing station. For example, apply butter and engine oil to the key parts of the equipment to ensure good lubrication of all parts of the equipment, reduce wear and extend the service life of the equipment. At the same time, check whether the water valve switch is turned on, the water pump is added with water, the air compressor opens the storage bin door, opens the unloading belt, opens the mixing main machine, opens the feeding belt, opens the ingredients (including granular materials, cement), and opens the water supply. Ensure that all parts of the equipment can start normally. In addition, check whether there are foreign objects stuck in the transmission and moving parts of the mixing drum and various supporting mechanisms, as well as the bin door, bucket door, track, etc., to prevent equipment from malfunctioning during operation.
2. Inspection of key components: The gearbox is an important transmission component of the equipment, and its oil level and oil quality directly affect the operating stability of the equipment. Therefore, check whether the oil level of the gearbox is sufficient and whether the oil quality is clean. If the oil is insufficient, it should be added in time, and if the oil is not clean, it needs to be replaced. The connection of the mixing station structure must be strong and reliable, and the limit device and brake must also be sensitive and reliable. This is related to the safety of equipment operation. Once a problem occurs, it may cause a serious accident. Also pay attention to the rubber sleeve connecting the weighing bucket to ensure that it is not subjected to tension and pressure, so as not to affect the weighing accuracy and thus affect the quality of concrete.
3. Electrical and mechanical inspection: The wire rope installation and drum winding of the lifting bucket or drag shovel must be correct, the wire rope and pulley must comply with regulations, and the brakes of the lifting bucket and drag shovel must be sensitive and effective to avoid dangerous situations such as wire rope breakage and bucket falling during material lifting. Each electrical device must be able to effectively control the mechanical action, and there must be no obvious damage to each contact point and the moving and static contacts to ensure stable power transmission and sensitive equipment operation. After confirming that the mixing system is normal, automatic circulation production can be carried out. It is strictly forbidden to stop or start with load to prevent damage to the equipment.
 II  Strict control during operation
1. Equipment startup and operation inspection: After starting the machine, the operator should carefully check the operation of the machine, especially whether the rotation direction of each rotating part is consistent with the direction of the arrow marked. If the direction is wrong, it will not only affect the normal operation of the equipment, but may also cause equipment damage or safety accidents.
2. Fault and abnormal handling: The mixer must not be stopped when it is fully loaded. This is an important principle to ensure the quality of concrete and production continuity. When a fault or power outage occurs, the power supply should be cut off immediately and the switch box should be locked to prevent accidental startup. Then, the concrete in the mixing drum should be cleaned in time to prevent the concrete from solidifying in the drum and damaging the equipment. After that, troubleshoot the problem or wait for the power to be restored.
3. Operation concentration and foreign matter cleaning: During operation, the operator must concentrate and always pay attention to the feeding system of each instrument, indicator, belt conveyor, and batcher. Once large pieces of stone and foreign matter are found, they should be removed in time to prevent these foreign matter from entering the mixer, damaging the equipment or affecting the quality of concrete.
4. Dangerous operations are prohibited: repair, maintenance, lubrication, tightening and other operations are strictly prohibited during the operation of the machine. Because these operations are performed while the equipment is running, the operator is very likely to be involved in the running parts, causing serious personal injury. At the same time, it is forbidden to put hands and feet near gates, mixing drums, spiral tubes, etc. to avoid accidental pinching accidents.
5. Handling before shutdown: Before the mixer is shut down, it should be unloaded first and the materials in the mixing drum should be emptied. Then turn off the switches and pipelines of each part in sequence, especially to transport all the cement in the spiral tube out to ensure that there is no residual material in the tube to prevent cement from caking in the tube and affecting the next use.
6. Drag shovel operation specifications: When the drag shovel is stuck by an obstacle, do not force it to pull, otherwise it may damage the drag shovel or cause the wire rope to break. At the same time, it is forbidden to lift heavy objects with the drag shovel. During the pulling process, rotation operations must not be performed to prevent dangerous situations such as material scattering and equipment imbalance.
 III  Proper handling after operation
1. Equipment locking and handover: After the operation, when the equipment operator receives a cleaning or maintenance notice, he should cut off the power supply of the equipment, lock the mixer key switch, remove the key, and lock the doors and windows of the operating room. This series of operations is to ensure that the equipment will not start accidentally during the cleaning or maintenance process to ensure the safety of personnel. After completing these operations, notify the cleaning or maintenance personnel to work.
2. Equipment cleaning and maintenance: The cleaning personnel should close the gate of the bulk cement tank and transport all the cement in the spiral tube to avoid cement residue. Then, clean the mixing drum, discharge door and discharge hopper, and rinse them with water, and rinse the additives and their supply system. The knife seat and knife edge of the weighing system should be cleaned, and the weighing accuracy should be ensured to prepare for the next production.
3. Special treatment in winter: In the freezing season, the water stored in the water pump, additive pump, water tank and additive tank should be drained, and the water pump and additive pump should be started for 1-2 minutes to prevent the water in the equipment from freezing and damaging the equipment.
4. Mechanical maintenance: Carry out comprehensive maintenance on the machinery, add lubricating oil to each lubrication point, apply oil to the parts that need protection to prevent rust, extend the service life of the equipment, and ensure that the equipment is always in good operating condition.