New concrete mixing plant air system failure Detailed

Portable concrete batching plant air system is concrete batching operation execution means , its role is emitted by industrial microcomputer time switch instruction each aggregate bin , mixer discharge gate , cement , said discharge door , breaking the cement warehouse cement arch, inflatable stirred for additives to ensure a variety of aggregate, cement , additives, accurate measurement and complete the finished material loading tasks. Only the precast concrete batching plant correct use and maintenance of the system , in order to ensure that the whole production of high efficiency and good economy.
Its common fault mainly in the following five categories:
1 gas system failure - air supply fails
Gas source common fault occurs in air compressors, valves , piping, compressed air treatment components.
( A ) air compressor check valve common fault is damaged, badly worn piston rings , inlet valve is damaged and clogged air filter .
After ten seconds the compressor automatically shut down , turn off the power , hand plate moving large belt wheel , if can more easily turn a week , then the check valve is not damaged , or corrupted ; also be based on automatic pressure switch the exhaust vent below to judge the situation , and if the air compressor automatically shut down after the always exhaust until the compressor starts again when to stop , then the check valve has been damaged, in need of replacement . When the compressor pressure rises slowly and accompanied by channeling oil phenomenon that has been severely worn piston ring compressor , should be replaced. When the intake valve is damaged or clogged air filter , but also make the air compressor pressure rises slowly ( but without channeling oil phenomenon ) . Put the palm to the air inlet filter , if the heated air out the top, then the inlet valve is damaged , replace ; if suction is small , usually caused by dirty air filters , filters should be cleaned or replaced makers.
( 2 ) The valve failure. Pressure regulator is not high, often regulator spring break or diaphragm rupture, must be updated ; pressure rises slowly , usually clogged filter should be removed and washed .
( 3 ) pipeline failure. Joint leakage and hose rupture site of leak by sound judgment , if the condensate pipe is easy to ice accumulation and clogging gas , should be immediately removed .
( 4 ) Compressed air handling component failures. Oil-water separator filter clogged , broken, drain valve moving parts are not flexible . Always clean the filter , remove the drain valve inside the oil and other impurities . Lubricator not drip oil deposited on the bottom of the cup of water , oil cup seals damaged . Should check the inlet gas flow rate is below the fog flow , leaks , fuel adjustment needle valve is blocked storm and so on.
2 gas system malfunction - cylinder failure
( A ) within the cylinder , external leakage , usually due to the eccentric rod installation , lubricating oil supply shortage , seals and sealing ring worn or damaged , the cylinder piston rod with impurities and bruises caused . Re-adjust the center position of the piston rod , the need to frequently check the reliability of the lubricator , timely removal of impurities within the cylinder ; piston rod bruises , should get a new piece .
( 2 ) lack of cylinder output force and movement is not smooth, generally pistons or piston rod is stuck due to poor lubrication , air supply is insufficient, or cylinder with condensate and impurities. Should be adjusted to the center of the piston rod ; checking the reliability of the lubricator ; supply line is blocked , the cylinder should be promptly removed condensate and impurities.
( 3 ) the cylinder cushioning effect is bad, usually due to a buffer seal worn or damaged adjusting screw , replace the seals and adjusting screw .
( 4 ) the piston rod and cylinder head damage , usually due to the eccentric rod installation or buffering mechanism does not work, should adjust the center position of the piston rod , if necessary, replace the buffer ring or adjusting screws.
3 air system failure - valve failure
( 1 ) can not change the direction or commutation slow . Should first check the lubricator is working properly ; lubricants Exclusion degree is appropriate. If necessary, change the oil , clean the sliding valve springs and valve parts or replacement .
( 2 ) Spool seals wear, plug and seat damage , the valve of the gas leak , slow or not functioning commutation should replace the seals , valve and seat , if necessary, replace the valve .
( 3 ) into the pilot solenoid valve , sludge and other vent is clogged , the strict closure , activity spool is stuck and circuit failure , can lead to valve can not be normal commutation. Pilot solenoid valve should be cleaned and activities on the spool sludge and other impurities. Check the circuit failure , should first manual valve knob a few turns , look at the rated air pressure valve is functioning properly commutation , if normal commutation , it is a circuit failure . Inspection , the available instrument measuring the voltage of the solenoid , to see whether the rated voltage, if the voltage is too low , should further examine the power control circuit and the associated limit switch circuit . If the hzs25 concrete batch plant valve is not properly rated voltage commutation , you should check the solenoid connector ( plug ) is loose or exposure is not true. Method is to unplug measuring coil resistance value ( generally should be between a few hundred to several thousand ohms ) , if the resistance is too large or too small , indicating that the electromagnetic coil is damaged and should be replaced.
4 gas system failure - failure pneumatic auxiliary components
( A ) regulating lubricator needle adjustment amount is too small , oil clogged pipeline leak and so will not be atomized liquid droplets , should be timely treatment clogging and leakage Department to adjust the amount of drip to reach 5 drops / min. Normal use, the oil cup to keep the oil in the upper and lower range. Oil cup bottom sediment of the water should be immediately removed .
( 2 ) automatic sewage water inside the oil and sometimes can not automatically excluded , should be removed for inspection and cleaning.
( 3 ) When the valve is installed on muffler is dirty or clogged , it will also IMPACT valve sensitivity to regular cleaning muffler .
5 air system failure - mechanical failure
In the powder measure hopper discharge opening on the cylinder often appear to be driven by material door shaft stuck ; cylinder driven by a rack flap disc valve is stuck , so that closing is not in place or not open. It should always be clear on the inside flap disc valve powder agglomeration.