Common failures and adjustment measures of concrete plant
Air source failure
(1) Air compressor failure: check valve damaged, piston ring worn seriously, damaged intake valve and air filter clogged.
To determine whether the check valve is damaged, just turn off the power after the air compressor automatically shuts down for more than ten seconds, and turn the large tape wheel with the hand wheel. If it can turn around easily, it means that the check valve is not damaged. ; On the contrary, the check valve is damaged; in addition, it can also be judged from the exhaust situation of the exhaust port below the automatic pressure switch. Generally, the air compressor should stop exhausting after about ten seconds after automatic shutdown. If the exhaust continues until the air compressor starts again, then the check valve is damaged and must be replaced.
When the pressure of the air compressor rises slowly and is accompanied by a string of oil, it indicates that the piston ring of the air compressor has been seriously worn and should be replaced in time.
When the intake valve is damaged or the air filter is clogged, it will also make the pressure of the air compressor rise slowly (but there is no oil stringing phenomenon). During the inspection, you can put your palm on the air inlet of the air filter. If there is hot air, it means that the air intake valve is damaged and needs to be replaced. If the suction power is small, it is generally caused by the dirty air filter. The filter should be cleaned or replaced.
(2) Failure of the pressure reducing valve: the pressure is not adjusted high, or the pressure rises slowly.
If the pressure is not adjusted high, it is often caused by a broken pressure spring or a ruptured diaphragm, and it must be replaced with a new one. The pressure rises slowly, which is generally caused by the clogged filter, and it should be removed and cleaned.
(3) Pipeline failure: leakage at the pipe joint, rupture of the hose, accumulation of condensate, etc.
If the pipeline joint leaks and the hose ruptures, the location of the air leakage can be judged from the sound, and it should be repaired or replaced in a timely manner; if condensate accumulates in the pipeline, it should be drained out in time. The air path was blocked by ice.
(4) The failures of the compressed air treatment assembly (triple) are: failure of the oil-water separator, failure of the pressure regulating valve and the lubricator.
The failure of the oil-water separator is divided into the following situations: the filter element is clogged or damaged, and the moving parts of the sewage valve are not flexible. During the work, the filter element should be cleaned frequently to remove the oil and impurities in the drain.
The failure of the pressure regulating valve is the same as the above "(2) Failure of the pressure reducing valve".
The failure phenomena of the lubricator are: no oil dripping, water is deposited on the bottom of the oil cup, and the sealing ring at the mouth of the oil cup is damaged. When the lubricator does not drip oil, it should be checked whether the air flow rate of the air inlet is lower than the fogging flow rate, whether there is air leakage, whether the oil adjustment needle valve is blocked, etc. if moisture is deposited on the bottom of the oil cup, it should be eliminated in time; When the sealing ring is damaged, it should be replaced in time.
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