Safety inspection before starting jaw crusher
Comprehensive equipment inspection
Perform a comprehensive inspection of the jaw crusher to ensure that it is in good initial condition. Check whether there is ore or debris in the crushing chamber. If so, remove it immediately. Check whether all fasteners such as connecting bolts are tightened to ensure that all parts of the equipment are connected reliably.
Mechanical component inspection
Thoroughly inspect the movable jaw, fixed jaw, eccentric shaft, pulley and other key mechanical components of the jaw crusher to confirm that they are firmly installed without looseness, deformation or damage. For example, check the wear of the jaw plate. Excessive wear may cause uneven crushing and even splashing of ore, causing safety problems. In addition, check the lubrication of the eccentric shaft. Good lubrication can reduce component friction and prevent overheating damage.
Discharge port adjustment inspection
Adjust the size of the jaw crusher discharge port according to the required product size. First loosen the relevant bolts and relax the tension spring. Use the eyebolt to open the adjustment seat, insert or remove the gasket of appropriate thickness, then return the eyebolt to its original position, accurately adjust the spring preload, and ensure that the elbow plate, elbow plate pad and gasket group fit tightly during operation.
Electrical system inspection
Comprehensively check the motor, control cabinet, cable and other electrical equipment and lines configured with the jaw crusher to ensure that the motor wiring is correct, the insulation is good, and there is no leakage. The buttons, switches, and indicator lights on the control cabinet should work well, sensitively and accurately. When checking the cable, pay attention to whether the cable is damaged or aging to avoid short circuits and electric shock accidents. In a humid environment, cable damage can cause leakage and cause serious harm to the operator.
Protective device inspection
Check whether the protective devices such as belt guards and flywheel guards are installed correctly. These guards can prevent operators from being injured by contacting high-speed rotating parts. Also check whether the guardrails at the crusher feed and discharge ports are firm. The guardrails can prevent operators from accidentally falling into the feed port or contacting the high-speed material flow at the discharge port during the operation of the equipment.
Start-up procedures and standards for jaw crushers
Sequential start-up
Start the jaw crusher in strict accordance with the sequence specified by the jaw crusher. First start the oil pump motor and cooling system, run for 3-4 minutes, and then start the crusher motor after the oil pressure and oil flow indicators show normal.
No-load start-up
The jaw crusher needs to be started without load, and it is strictly forbidden to carry load. After starting up, run it without load and observe it. After the parts move smoothly and there is no abnormality, start the feeding equipment and gradually increase the amount to normal production.
Operation points when the jaw crusher is running
Uniform feeding
Maintaining uniform feeding is the key to ensuring the stable operation of the jaw crusher. Avoid side feeding, full feeding or unilateral overloading to prevent sudden load changes. At the same time, strictly control the maximum size of the feed block, which shall not be greater than 0.85 times the width of the feed port, and strictly prevent non-crushed objects from entering the crusher to avoid damage to the internal components of the equipment.
Prevent blocking
During the crushing process of the jaw crusher, the feeding situation should be closely monitored to prevent blocking caused by excessive feeding speed or excessive feeding particles. Once the material is blocked, the equipment should be stopped immediately to avoid overloading and damaging the motor, and to prevent the pressure increase caused by the blockage from damaging the equipment parts or even crashing.
Keep away from moving parts
During the operation of the jaw crusher, the operator must keep a safe distance from the moving parts of the crusher, such as the movable jaw, pulley, flywheel, etc. These parts have great kinetic energy when moving at high speed, and once they come into contact with the human body, they will cause serious injuries.
Monitor abnormal sounds and vibrations
During the operation of the jaw crusher, always pay attention to abnormal sounds and vibrations. Abnormal sounds may be caused by loose parts, wear or foreign matter entering the crushing chamber. Excessive vibration may be caused by loose equipment foundation, unbalanced parts or material blockage. If abnormal sounds or vibrations are found, the equipment should be stopped immediately for comprehensive inspection and maintenance.
Control bearing temperature
During the normal operation of the jaw crusher, the bearing temperature must be closely monitored. The temperature rise shall not exceed 30℃, the maximum temperature shall not exceed 70℃, and the sliding bearing temperature of large jaw crushers shall generally not exceed 60℃. If the bearing is overheated, it should be cooled down first, such as increasing the oil supply, forced ventilation or water cooling, etc. It is not allowed to stop the machine immediately. Wait until the temperature drops before stopping to check the fault to ensure the safe and stable operation of the equipment.
Strictly prohibit illegal operation
During the operation of the equipment, strictly abide by the operating procedures of the jaw crusher. It is strictly forbidden to peek into the machine from above, make any adjustments, cleaning or maintenance work, and it is strictly forbidden to carry or move stones directly at the feed port or crushing chamber by hand.
Jaw crusher shutdown steps and subsequent work
Sequential shutdown
When shutting down, the feed must be stopped first, and the crusher motor can be turned off only after the material in the crushing chamber is completely discharged. When the crusher stops running, the oil pump and cooling system should be stopped.
Equipment cleaning
After shutting down, clean the various parts of the crusher, remove the surface materials and residues, keep it clean, and facilitate inspection and maintenance before the next start-up. Check each component in detail, record the wear and operation status, and provide a basis for subsequent maintenance to ensure the good operation of the equipmen
