How to Inspect the Installation Quality of A Belt Type Concrete Mixing Plant?
The installation quality of a belt - type concrete mixing plant can be inspected from the following aspects:
Foundation Section
Appearance and Dimensions
Check that the surface of the foundation should be flat, free from obvious cracks, honeycombing, and pitting. Measure the length, width, height of the foundation and the position dimensions of each embedded part, which should be in line with the design drawings, and the dimensional deviation should be within the allowable range.
Strength and Bearing Capacity
Review the strength report of the foundation concrete, and its strength should meet the design requirements. If necessary, equipment such as a rebound hammer can be used to test the strength of the foundation concrete. Meanwhile, check whether the soil around the foundation is well - compacted to avoid foundation settlement caused by soft soil.
Levelness and Flatness
Use a level gauge to measure the levelness of the foundation. The overall levelness deviation of the foundation should not exceed the specified value. For the flatness of the foundation surface, a straightedge and feeler gauge can be used for inspection to ensure that the unevenness of the foundation surface is within the allowable range.
Belt Conveyor Section
Belt
Check that the surface of the belt should be free from damage, scratches, cracks, etc., and the edge of the belt should be neat. Start the belt conveyor and observe whether the belt runs smoothly and there is no deviation. Measure the tension of the belt. Apply a certain pressure in the middle of the belt to check whether the sag of the belt is within the specified range.
Frame and Idlers
Check whether the frame is deformed or distorted. The bolts at each connection part should be tightened, and the welds should be free from cracking. The idlers should rotate flexibly without jamming. Rotate the idlers by hand to check their flexibility and uniformity of rotation. At the same time, check whether the installation position of the idlers is correct, and the height difference between each idler should meet the requirements.
Drive and Tensioning Devices
Check that the drive motor and reducer are installed firmly, the connection of the coupling is tight, and there is no looseness or abnormal noise. The stroke of the tensioning device should meet the design requirements. The tensioning screw rod should be adjustable flexibly and have sufficient adjustment margin.
Cement Silo Section
Appearance and Structure
Observe whether the tank body of the cement silo is deformed or rusted, and whether the paint is uniform and free from peeling. Check whether the components such as the dust collector and safety valve on the top of the silo are completely and firmly installed and can work normally. The legs of the cement silo should be vertical, and the connection with the foundation should be firm. The welds should be full without incomplete or false welding.
Level Indicator and Conveying Pipeline
Check whether the installation position of the level indicator is correct, the wiring is firm, and check whether it can accurately display the material level in the cement silo after power - on. The connection of the cement conveying pipeline should be tight without leakage. The support and fixation of the pipeline should be firm to avoid the shaking or vibration of the pipeline.
Concrete Mixer Section
Mixing Main Unit
Check that the mixing drum of the mixer should be clean without debris remaining. The clearance between the mixing blades and the drum wall should be uniform and meet the equipment requirements. Start the mixer and observe whether the mixing main unit runs smoothly without abnormal vibration and noise. Measure the motor current of the mixer, which should be within the rated current range.
Feeding and Discharging Devices
The positions of the feeding port and discharging port should be correct, and the connection with the conveying pipeline or hopper should be tight without material leakage. Check whether the discharge door opens and closes flexibly, and the sealing is good. When closed, there should be no obvious gap between the discharge door and the discharge port.
Electrical System Section
Circuits and Wiring
Check that the laying of electrical circuits should be neat and standardized, without damage, aging, or exposure. The connection of each terminal should be firm without looseness or overheating signs. The wiring should meet the requirements of the electrical schematic diagram with clear markings.
Electrical Equipment and Control
Check that electrical equipment such as motors, distribution cabinets, and control cabinets are installed firmly and the grounding is good. Test the insulation resistance of each electrical equipment, which should meet the specified requirements. Operate control buttons, switches, etc., and check whether the control functions of the electrical system are normal. The start - stop, forward - reverse rotation, etc. of each equipment should be sensitive and reliable.
Weighing System Section
Sensors and Meters
Check that the installation of metering sensors is correct, the force is evenly distributed, and there is no looseness or deformation. The display of the metering meters should be clear and accurate without garbled characters or jumping numbers. Calibrate the zero point and range of the metering system to check whether its metering accuracy meets the specified requirements.
Material Metering
Conduct material metering tests. Weigh and measure materials such as cement, sand, gravel, and water respectively, and check whether the metering results deviate from the set values within the allowable range. Conduct multiple metering tests to check the repeatability and stability of the metering system.
