Treatment of Valve Storm in twin-shaft concrete mixer

2017-05-25

What happens if the twin-shaft concrete mixer is in trouble with the valve?
The twin-shaft concrete mixer can not be reversed or the commutation action is slow. Should check the work of the oil mist is normal; lubricating oil is appropriate. If necessary, replace the lubricating oil, clean the sliding part of the reversing valve or replace the spring and the reversing valve.
(2) Spool seal wear, spool and seat damage, valve gas leakage, slow or not normal commutation, should replace the seal, spool and valve seat, if necessary, replace the new valve.
(3) the pilot solenoid valve into the exhaust hole is blocked by sludge and other debris, closed lax, active spool is stuck and circuit failure, etc., can lead to the valve can not be normal for. Should promptly clean the pilot solenoid valve and the active spool on the sludge and other impurities. Check the circuit failure, the valve should first turn the manual knob a few times to see the rated pressure in the valve can be normal for the direction, if the normal commutation, then the circuit is faulty. Check the instrument can be used to measure the voltage of the solenoid to see if the rated voltage is reached, if the voltage is too low, should further check the control circuit in the power and the relevant trip switch circuit. If the reversing valve can not be changed normally at rated voltage, check whether the connector (plug) of the solenoid is loose or not in contact. Method is to unplug the plug, measuring the coil resistance (generally should be between several hundred to several thousand ohms), if the resistance is too large or too small, indicating that the solenoid is damaged, should be replaced.
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