Five concrete mixing plant air system failure
In actual operation, often encounter a variety of construction problems, including concrete mixing plant will be a variety of abnormal conditions. Concrete mixing plant air system is concrete mixing station operation execution means, it is the role of the computer industry by instruction issued promptly switch each aggregate silo, mixer discharge gate, cement, said discharge doors, broken cement within the cement silo arch, inflatable stirred for additives to ensure accurate measurement of various aggregates, cement, additives, and complete the finished material loading tasks. Only the correct use and maintenance of the system, in order to ensure the machines high efficiency and good economy.
The common fault mainly in the following five categories:
1. Gas system fault - air supply failure
Common air supply failure in the compressor, valves, piping, compressed air treatment components. (1) air compressor check valve common fault is damaged, badly worn piston rings, intake valves become damaged and the air filter is clogged. Compressor automatically shut down after ten seconds, cm140g gas mini portable concrete mixer turn off the power, the hand plate moving big belt wheel, if you can more easily turn a week, then the check valve is not damaged, or corrupted; also be based on the automatic pressure switch exhaust vent following cases to judge, if the compressor automatically shut always exhaust, until the compressor start again when the stop, then the non-return valve has been damaged, replace it. When the compressor pressure rise slowly and accompanied by channeling oil phenomenon, show piston ring compressor badly worn and should be replaced. When the intake valve damaged or clogged air filter, air compressor pressure will also rise slowly (but no oil channeling phenomenon). Place the palm of your hand to put to the air filter inlet, if there is heat out the top, then the intake valve is damaged, replace it; if suction is small, usually caused by dirty air filters should be cleaned or replaced filter device. (2) valve failure. The pressure regulator is not high, often regulator spring break or diaphragm rupture, you must update; pressure rises slowly, usually filter clogging, should be removed for cleaning. (3) line fault. Joint leakage and by the sound of the hose rupture site of the leak, if the pipeline is easy to accumulate condensate gas line freeze and plug should be immediately removed. (4) Compressed air handling component failures. Oil-water separator filter clogging, breakage, moving parts blowdown valve is not flexible. Always clean the filter, remove the drain valve within the oil and other impurities. Lubricator does not drip, oil cup bottom sediment moisture, oil cup seal damage. Check the inlet air flow is below the fog flow, leaks, fuel adjustment needle is blocking the storm and so on.
2. Gas system fault - cylinder failure
(1) within the cylinder, external leakage, usually because of the piston rod installation eccentricity, lack of lubricant supply, seals and seal rings are worn or damaged, the cylinder and piston rod impurities caused injuries. Should readjust the jzc 350 electric concrete mixer for sale center position of the piston rod, you need regular checks lubricator reliability, timely removal of impurities within the cylinder; when injuries on the piston rod, should get a new member. (2) lack of cylinder output force and action is not smooth, usually because of the piston or piston rod is stuck, poor lubrication, inadequate amount of gas, or condensate and impurities within the cylinder. Should be adjusted to the center position of the piston rod; reliability lubricator work; the supply line is blocked, should be promptly removed the cylinder condensate and impurities. (3) cylinder cushion the adverse effect, it is generally due to a buffer ring worn or damaged adjustment screws, replace the seal and adjustment screw. (4) the piston rod and the cylinder head is damaged, usually because of the piston rod installation eccentricity or buffering mechanism does not work, should adjust the center position of the piston rod, if necessary, replace the buffer ring or adjusting screw.
3. Gas system fault - valve failure
(1) can not change direction or slow commutation. Lubricator should first check whether the work; the exclusion of the lubricant is appropriate. When necessary, changing the oil, clean the sliding portion of the valve springs and valve or replace. (2) Spool seal wear, valve and seat damage, a gas leak in the valve, slow or not normal commutation, should replace the seals, valve and valve seats, valve replacement, if necessary. (3) pilot solenoid valve inlet and exhaust vent blocked sludge and other debris, closed lax, activity spool is stuck and circuit failure, can lead to valve can not be normal commutation. Sludge should be cleaned of impurities such as pilot solenoid valve and activities on the plug. Check before circuit failure, should first valve manual knob several times, look at rated pressure valve if normal commutation, if normal commutation, it is a circuit failure. Check the voltage available instrument measuring the electromagnetic coil to see whether the rated voltage, if the voltage is too low, should be further examination of the control circuit power supply and associated limit switch circuit. If the valve is not properly rated voltage commutation, you should check the solenoid connector (plug) is loose or not true. twin shaft concrete mixer manufacturers The method is to unplug the resistance measuring coil (usually be between several hundred to several thousand ohms), if the resistance is too big or too small, indicating that the electromagnetic coil is damaged, should be replaced.
The air system failure - pneumatic auxiliary component failure
(1) adjusting the amount of oil mist adjusting needle is too small, oil plug, pipeline leaks and so will not be atomized liquid droplets, should be promptly dealt congestion and air leakage, adjust the drip volume to reach 5 drops / min. During normal use, the oil within the oil cup to remain in the upper and lower range. Cup water to the bottom oil deposits should be excluded. (2) oil and water within the automatic sewage sometimes can not be automatically excluded, should be removed for inspection and cleaning. (3) When the muffler installed on the valve is dirty or clogged, it will IMPACT valve sensitivity to regularly clean muffler.
5. The air system failure - Mechanical failure
On powder metering hopper discharge opening often appear driven cylinder charging door shaft is stuck; cylinder driven by a rack flap disc valve is stuck, so that closing is not in place or not open. You should always remove the powder agglomeration butterfly valve flap on the inner wall.