21 common faults of filter press and their solutions
Fault 1: Insufficient pressure
Treatment method: The relief valve is damaged, repair or replace it; the oil level is insufficient, add hydraulic oil; the oil pump is damaged, replace the oil pump; there is leakage at the valve block and joints, tighten and replace the O-ring; the cylinder sealing ring is worn, replace the sealing ring.
Fault 2: Poor pressure holding
Treatment method: The piston sealing ring is worn, replace the sealing ring; the oil line leaks, repair the oil line; the hydraulic control check valve is clogged or worn, clean or replace it; the solenoid ball valve is clogged or worn, clean or replace it.
Fault 3: Filter plate ruptured
Treatment method: The feed pressure is too high during filtration, adjust the feed pressure; the feed temperature is too high, replace the high temperature plate or cool it before filtering; the feed speed is too fast, reduce the feed speed; the feed hole of the filter plate is clogged, clean the feed Material holes; the filter cloth is damaged and the discharge port is blocked. Replace the filter cloth and clean it; the mud cake is not full. Clean and check to make the mud cake full.
Fault 4: The filter plate is lifted upwards
Solution: The installation foundation is uneven, correct the foundation again; the lower part of the filter plate is not clean, clean it up.
Fault 5: The filtrate is unclear
Solution: The filter cloth is damaged, replace the filter cloth; the filter cloth is improperly selected, re-test, and replace the filter cloth; the opening of the filter cloth is too large, replace the filter cloth; the seams of the filter cloth are open and re-sewed.
Fault 6: There is noise in the hydraulic system
Solution: suck in air and open the air release valve to release air; if the fasteners are loose, tighten them; if the viscosity of the hydraulic oil is too high, reduce the viscosity of the hydraulic oil.
Fault 7: Main beam bending
Solution: The foundation at the cylinder end is rough and the degree of freedom is not enough, reinstall it; the filter plates are not parallel and the pull plates are not synchronized, rearrange the filter plates and adjust the synchronization of the pull plate trolley; the head plate is not straight and the filter press support frame is deformed, adjust it. .
Fault 8: The trolley does not pull the board
Solution: There is no signal from the limit switch. Adjust the position of the head plate. If the trolley is not in place, adjust the trolley position. If Y4 and Y5 do not move, replace the Y4 and Y5 relays.
Fault 9: Filter cloth is damaged
Treatment method: There is too much slime on the filter cloth, rinse it in time; if the first-level cyclone is rough, replace the bottom flow nozzle.
Fault 10: Plate overtime alarm
Solution: The proximity switch of the closing plate is broken, replace the proximity switch; the pull plate motor and frequency converter or reducer and chain transmission mechanism are faulty, check and repair
Fault 11: Pressing timeout alarm
Solution: If the electric contact pressure gauge is damaged, check and replace it; If the hydraulic system fails, check and repair it.
Fault 12: Feed valve timeout alarm
Solution: The solenoid valve does not operate. Check and replace the stroke switch. If the stroke switch is broken, check, repair and replace. If the air pressure is insufficient, check and repair.
Fault 13: The feed pump cannot feed normally after starting
Solution: Check and repair the coupling of the motor and pump for damage; the feed pipe is blocked and cleaned.
Fault 14: Shotcrete
Solution: The pressing force is not enough, increase the pressing force; clamp peat on the edge of the filter plate, clean the mud; fold the filter cloth,
Smooth the filter cloth.
Fault 15: The stop pin does not move up and down
The solution is to check the proximity switch for poor contact and replace the proximity switch; check the brake motor for failure of the anti-return pin mechanism.
Fault 16: The air inlet valve cannot be opened during pressing
Solution: The inlet pressure is low, check the air compressor, the inlet pressure gauge is broken, replace the pressure gauge.
Fault 17: Air leakage from the filtrate pipe on the control board during pressing
Solution: If the filter plate is damaged, check and replace the filter plate; if the sealing ring of the air inlet hole of the filter plate is lost, replace the sealing ring.
Fault 18: Unloading is released, and the panel displays release timeout
Solution: Loosen the proximity switch and replace it; if there is a hydraulic failure, check and repair it.
Fault 19: The head plate moves too slowly
Solution: If the high and low pressure oil pumps are abnormal, repair the oil filter, remove the air in the pump, and check the performance of the high and low pressure oil pumps.
Fault 20: The plate pulling device frequently hits the filter plate handle
Solution: There is insufficient oil in the pull plate and the pressure accumulator does not operate. Adjust the pressure relay spring and the flow rate of the speed control valve to increase the oil pressure.
Fault 21: The oil pump is too hot and does not provide oil.
Solution: Wrong steering of the motor or oil pump, dirty oil, low oil level, oil pump oil problem, etc. Adjust the steering of the oil pump and motor, clean the oil pump and oil filter; refuel; check the oil pump, etc.