-
E-mail
sale@sanli.net.cn
-
Phone
13833466962
-
Address
No. 68 Airport Road, Xinle Development Zone, Shijiazhuang City
Shijiazhuang Sanli Grain Machinery Co., Ltd
Inspection work before starting the grain screening machine
Date: 2025-12-15Read: 4
The inspection work before starting the grain screening machine is a key link to ensure the safe and efficient operation of the equipment, which can effectively avoid faults and extend the service life of the equipment. The following are detailed inspection steps and precautions:
1、 Overall inspection of grain screening machine
1. Environmental inspection
Clean up debris around the equipment, ensure that the work area is unobstructed and well ventilated.
Check if the ground is flat to avoid equipment displacement due to vibration during operation.
Confirm that the power supply voltage matches the rated parameters of the equipment, the cables are undamaged, and the joints are secure.
2. Safety protection
Ensure that safety devices such as emergency stop buttons and protective covers are functioning properly.
Check if the equipment grounding is reliable to prevent the risk of electrical leakage.
Equip with fire-fighting equipment and prohibit the stacking of flammable materials near the equipment.
2、 Inspection of mechanical components of grain screening machine
1. Transmission system
Check whether the transmission components such as belts, chains, and gears are worn or loose, and adjust the tension to the standard value.
Manually rotate the spindle or coupling to ensure smooth operation without any jamming.
2. Sieve and sieve plate
Check whether the sieve mesh (round hole, square hole or punched plate) is damaged, deformed or blocked, and replace or clean it if necessary.
Confirm that the fixing bolts of the screen mesh are not loose and that the screen body is firmly connected to the machine body.
3. Bearings and lubrication
Check whether the lubricating grease in each bearing part is sufficient, and add or replace it according to the instructions.
Observe whether the bearing clearance is normal and whether there are any abnormal heating traces.
4. Inspection of fasteners
Check the anchor bolts, shell screws, screen frame pressure plates and other fasteners one by one to ensure that they are not loose.
3、 Electrical system inspection of grain screening machine
1. Control box and circuit
Open the electrical control cabinet and check whether the circuit breaker, contactor, relay and other components are intact, and whether the wiring terminals are free of oxidation.
Test the insulation resistance of the motor (usually ≥ 0.5M Ω) to eliminate the possibility of moisture.
Confirm that sensors (such as temperature and vibration sensors) are installed correctly and functioning properly.
2. Motor inspection
Manually rotate and test the flexibility of the motor rotor, and auscultate the bearings for any abnormal noise.
Check if the motor direction matches the equipment identification direction (some models require reverse adjustment).
4、 Material and process inspection of grain screening machine
1. Inlet and outlet
Clean up the residual grain in the feeding hopper to avoid impurities from entering and causing blockage.
Check if the discharge port baffle adjustment mechanism is flexible to ensure controllable grading accuracy.
2. Preprocessing stage
If there are front-end equipment such as crushers and stone removal machines, their operating status needs to be checked synchronously.
Confirm the uniformity of the feeding of the conveyor belt or elevator to prevent overload.
5、 Preparation for trial operation of grain screening machine
1. No load trial operation
Briefly power on the jog motor and observe whether the vibration trajectory of the screen body is stable without lateral oscillation.
Monitor the running sound and identify whether there is any metal collision sound or bearing noise.
2. Load debugging
First, conduct a small-scale feeding test to check the screening efficiency (such as impurity removal rate and particle size grading ratio).
Adjust the air volume or vibration frequency to optimize the separation effect.
