1. The frame filter filter plate is loose or even leaking oil.
Fault analysis: The hydraulic system of the plate and frame filter mainly provides pressure. When the oil chamber A increases the oil, the piston moves to the left, and the filter plate is pressed to seal it. When the oil chamber B is filled with oil, the piston moves to the right and the filter plate is released. Due to the precision of manufacturing, the hydraulic system of the filter has fewer failures, so just pay attention to routine maintenance. Due to the wear and tear, oil leakage will occur every one year or so. At this time, it is necessary to repair and replace the O-ring.
Solution: Common filter hydraulic failures and pressures are not maintained and hydraulic cylinders are not suitable for propulsion. The main reasons for the inability to maintain pressure are oil leakage, O-ring wear and improper operation of the solenoid valve. The usual treatment methods are to remove and inspect the valve, replace the O-ring, clean the check solenoid valve or replace the solenoid valve. If the filter hydraulic cylinder is not properly propelled, it is obvious that the air is sealed inside. At this time, as long as the system is pumping air, it can be quickly solved.
Second, the plate and frame filter filter plate walks slowly or even falls off
Fault analysis: Sometimes, due to oil stains and excessive stains on the guide bar, the plate filter filter plate will be slow to walk, and even will fall off.
Solution: At this time, it is necessary to clean the guide bar in time and apply butter to ensure its lubricity. It should be noted that it is strictly forbidden to apply thin oil on the guide rod, because the thin oil is easy to fall and the lower side is very slippery. The personnel who are here to operate and overhaul can easily fall, causing personal injury accidents.
Third, the plate frame filter filter plate has groove marks
Fault Analysis: After a few years of use, the filter plate is washed for some reason to make some grooves appear at the corners. Once the groove marks appear, it will expand rapidly until it affects the formation of the filter cake. At first, the filter cake became soft and then became semi-sludge. After the Zui, the filter cake could not be formed. Due to the special material of the filter plate, it is difficult to repair and can only be replaced with new ones, resulting in high spare parts cost. During this period, we tried some repairing agents, but the effect has been not good. When Zui changed to oil surface repair agent, the situation finally turned around. The trial effect was very good and the sealing effect was achieved.
Solution: 1. Clean the groove, leak out the fresh surface, clean it with a small saw blade, etc. 2. Dispense the two kinds of black and white repairing agent according to the ratio of 1:1. 3. Apply the prepared repairing agent to the groove and fill it. Slightly higher 4, quickly set the filter filter cloth, squeeze the filter filter plate together, make the repair agent and filter filter cloth stick together, and at the same time squeeze the groove 5, squeeze for a period of time, the glue is naturally formed , no longer change, you can use it at this time.
Fourth, the plate filter filter cake is not uniform or formed
Fault analysis: There are many reasons for the failure or unevenness of the filter cake of the plate and frame filter. The supply is insufficient or too thin, or there is a blockage phenomenon. For these faults to be carefully investigated, Zui finally finds the exact problem, and then solves the problem.
Solution: The main solutions are: increase feeding, adjust the process, improve the feeding, clean the filter cloth or replace the filter cloth, clean the blockage, clean the supply hole, clean the drain hole, clean or replace the filter Filter cloth, increase pressure or pump power, low pressure start, continuous pressurization and other methods.
Five, plate and frame filter frame damage
Fault analysis: The reasons for the damage of the filter plate itself are as follows: 1. When the filter plate is not cleaned, sometimes the media will leak out. Once leaked, the edge of the plate frame will be washed out with a small ditch. A large amount of leakage of the medium caused the pressure to rise and the mud cake could not be formed. 2. If the outlet is blocked by solids or the supply valve is closed or the valve is closed when starting, the pressure is not leaked, causing damage. 3. If the supply is insufficient or the feed contains inappropriate solid particles, the plate frame itself will be stressed too much to be damaged. 4. When the sludge is too thick or the dry block is left, it will cause blockage of the feed port. At this time, there is no medium between the filter plates of the filter, only the pressure of the hydraulic system itself is left. At this time, the plate itself is pressed for a long time. Extremely easy to cause damage.
Corresponding solutions: 1. Use a nylon cleaning blade to remove the mud from the feed port. 2. Complete the cycle, reduce the filter plate volume. 3. Check the filter cloth, clean the drain, check the outlet, open the corresponding valve, and release. Pressure 4, carefully clean the filter plate, repair the filter filter plate.
Fault analysis: The hydraulic system of the plate and frame filter mainly provides pressure. When the oil chamber A increases the oil, the piston moves to the left, and the filter plate is pressed to seal it. When the oil chamber B is filled with oil, the piston moves to the right and the filter plate is released. Due to the precision of manufacturing, the hydraulic system of the filter has fewer failures, so just pay attention to routine maintenance. Due to the wear and tear, oil leakage will occur every one year or so. At this time, it is necessary to repair and replace the O-ring.
Solution: Common filter hydraulic failures and pressures are not maintained and hydraulic cylinders are not suitable for propulsion. The main reasons for the inability to maintain pressure are oil leakage, O-ring wear and improper operation of the solenoid valve. The usual treatment methods are to remove and inspect the valve, replace the O-ring, clean the check solenoid valve or replace the solenoid valve. If the filter hydraulic cylinder is not properly propelled, it is obvious that the air is sealed inside. At this time, as long as the system is pumping air, it can be quickly solved.
Second, the plate and frame filter filter plate walks slowly or even falls off
Fault analysis: Sometimes, due to oil stains and excessive stains on the guide bar, the plate filter filter plate will be slow to walk, and even will fall off.
Solution: At this time, it is necessary to clean the guide bar in time and apply butter to ensure its lubricity. It should be noted that it is strictly forbidden to apply thin oil on the guide rod, because the thin oil is easy to fall and the lower side is very slippery. The personnel who are here to operate and overhaul can easily fall, causing personal injury accidents.
Third, the plate frame filter filter plate has groove marks
Fault Analysis: After a few years of use, the filter plate is washed for some reason to make some grooves appear at the corners. Once the groove marks appear, it will expand rapidly until it affects the formation of the filter cake. At first, the filter cake became soft and then became semi-sludge. After the Zui, the filter cake could not be formed. Due to the special material of the filter plate, it is difficult to repair and can only be replaced with new ones, resulting in high spare parts cost. During this period, we tried some repairing agents, but the effect has been not good. When Zui changed to oil surface repair agent, the situation finally turned around. The trial effect was very good and the sealing effect was achieved.
Solution: 1. Clean the groove, leak out the fresh surface, clean it with a small saw blade, etc. 2. Dispense the two kinds of black and white repairing agent according to the ratio of 1:1. 3. Apply the prepared repairing agent to the groove and fill it. Slightly higher 4, quickly set the filter filter cloth, squeeze the filter filter plate together, make the repair agent and filter filter cloth stick together, and at the same time squeeze the groove 5, squeeze for a period of time, the glue is naturally formed , no longer change, you can use it at this time.
Fourth, the plate filter filter cake is not uniform or formed
Fault analysis: There are many reasons for the failure or unevenness of the filter cake of the plate and frame filter. The supply is insufficient or too thin, or there is a blockage phenomenon. For these faults to be carefully investigated, Zui finally finds the exact problem, and then solves the problem.
Solution: The main solutions are: increase feeding, adjust the process, improve the feeding, clean the filter cloth or replace the filter cloth, clean the blockage, clean the supply hole, clean the drain hole, clean or replace the filter Filter cloth, increase pressure or pump power, low pressure start, continuous pressurization and other methods.
Five, plate and frame filter frame damage
Fault analysis: The reasons for the damage of the filter plate itself are as follows: 1. When the filter plate is not cleaned, sometimes the media will leak out. Once leaked, the edge of the plate frame will be washed out with a small ditch. A large amount of leakage of the medium caused the pressure to rise and the mud cake could not be formed. 2. If the outlet is blocked by solids or the supply valve is closed or the valve is closed when starting, the pressure is not leaked, causing damage. 3. If the supply is insufficient or the feed contains inappropriate solid particles, the plate frame itself will be stressed too much to be damaged. 4. When the sludge is too thick or the dry block is left, it will cause blockage of the feed port. At this time, there is no medium between the filter plates of the filter, only the pressure of the hydraulic system itself is left. At this time, the plate itself is pressed for a long time. Extremely easy to cause damage.
Corresponding solutions: 1. Use a nylon cleaning blade to remove the mud from the feed port. 2. Complete the cycle, reduce the filter plate volume. 3. Check the filter cloth, clean the drain, check the outlet, open the corresponding valve, and release. Pressure 4, carefully clean the filter plate, repair the filter filter plate.
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