Five gas path systems faults of concrete mixing plant

Submitted by Anne,11/03/2014
In the actual operation process, you may often meet a variety of problems in construction. The concrete mixing plant will also have a variety of abnormal conditions. The gas path system of concrete mixing plant is the executive device of the concrete mixing plant. It plays a very important  role in  timely open and close  each aggregate storage bin, mixer discharge door, cement called discharge door  according to the industrial computer instructions, on the cement bin cement arch breaking, mixing the additive blowing, ensure accurate measurement of various aggregate, cement, additive, and complete the task finished material loading. Only the correct use and maintenance of the system, the high efficiency and good economy of the production can be ensured.
The common main five faults are as follows:
1. Air failure
(1)The common fault of the air compressor is non-return valve damage, piston ring wear serious, air inlet valve damage and air filter is clogged.
(2)The pressure relief valve failure. Pressure is not high, the failure always is the pressure regulating spring breakage or rupture of diaphragm, and it must be updated. The pressure rise is slow, generally the failure is the clogging of the filter, which should remove and clean it.
2. Cylinder trouble
(1)The buffering effect of the cylinder is bad, generally due to the buffer ring wear or the adjusting screw is damaged, you should replace the sealing ring and adjust the screw.
(2)The piston rod and the cylinder head damage, usually due to the eccentric rod installation or buffer mechanism does not work, you should adjust the center position of the piston rod in time, when necessary, you should also replace the buffer ring or adjust the screw.
3. The reversing valve fault
(1) The reversing valve can not change or change slowly. You should check whether the oil mist device is working properly and whether the lubricating oil viscosity is appropriate. If necessary, replace the oil, clean the valve sliding part or replace the spring and valve.
(2)The valve sealing ring wear, the valve core and valve seat in the valve damage, gas leakage, slow or can not be normal for, at this time, you should replace the sealing ring, the valve core and valve seat, when necessary, you should also replace the new valve .
4. Pneumatic auxiliary element failure
The adjusting amount of the mist device adjusting needle is too small, oil plug and pipeline leak can make the liquid droplets of oil can't  be atomized,  you should  promptly dealt with the blockage and leakage, adjust the amount of oil drops make it achieves about 5 drops /min. In normal use, the oil surface in the oil cup should maintain in the lower range. The sediment water on the bottom of cup should be excluded in time.
5. Mechanical failure
In the powder metering hopper discharge mouth often appear that the material shaft  droved by the air cylinder is stuck; the turning plate butterfly valve  driven by the rack cylinder  is stuck. This will make the close and open is not in place or not open. So you should often clear the powder agglomeration plate on the inner wall of the butterfly valve.