language
English
ChineseThe auto air compressor spare parts system causes frequent loading and unloading, and the system cause is more complicated to deal with. It can be judged by the difference between the compressor outlet pressure and the air dryer outlet pressure. If there is a difference or the difference is too large, it can be judged that the pipeline or equipment is blocked. Due to the large number of equipment in this pipeline, after long-term maintenance and observation, it is found that the equipment that is often blocked are: oil removal, water removal filter: including filter core; filter drain solenoid valve; filter before the drain solenoid valve .
Among them, the filter screen in front of the sewage solenoid valve is the most likely to be blocked, which can be solved by cleaning or replacement. The blowdown solenoid valve generally may have the phenomenon of valve body jamming, coil burning, timer failure, etc., which can be solved by replacing it. In a factory, the ash removal compressor once occurred because the filter screen before the drain solenoid valve of the water removal filter was blocked, and the sewage could not be discharged in time. The sewage filled the filter and caused the compressor to be frequently loaded and unloaded. After the maintenance personnel cleaned the filter screen, it was normal.
The inlet switching valve of adsorption drying tower A and B inside the refrigeration dryer. At present, many companies use adsorption dryers for post-processing of compressed air, and generally need to switch between A and B towers. If the switching valve is not switched in place, it can also cause the gas flow to be blocked. Some of the inlet switching valves of the drying towers A and B of the refrigeration dryer are pneumatic switch type, and the fault of the pneumatic switch type valve generally occurs in the control air source and the valve body.
Maintenance personnel can judge whether the control air source is normal by checking whether there is water in the filter pressure reducing valve or whether the air source pipeline is falling off; they can also manually operate the pneumatic valve to judge whether the valve body is flexible and the cylinder is tight. good. If the control air source with water blocks the filter pressure reducing valve, the compressor will be frequently loaded and unloaded because the switching valve cannot be controlled. In view of this situation, the sampling point of the control air source can be changed to the outlet pipeline of the refrigerating machine to solve the problem of water in the control air source;
If the temperature of the pre-cooler and evaporator in the dryer is not well adjusted, it is easy to cause ice blockage at the inlet and outlet of the evaporator, thus hindering the flow of gas. The occurrence of ice blockage or improper adjustment of evaporator temperature can be judged by observation. If there is sweating in the compressed air pipeline in the freezer; or the parameter settings of the freezer do not meet the design requirements of the equipment, adjustments should be made in time to avoid freezing. equipment causing unnecessary losses.
This situation occurs frequently during seasonal changes, and is generally solved by properly adjusting the temperature of the evaporator; the wrong installation of the check valve at the outlet of the dust filter or the detachment of the valve stem and the valve body will also cause the compressor to be frequently loaded and unloaded. The above-mentioned factory once happened because after overhauling the leakage defect of the check valve at the outlet of the dust filter, the direction of the valve was negligently installed, so that the compressed air could not flow into the gas storage tank, and the gas in the gas storage tank could flow back to the cold dryer. Cause frequent loading and unloading of the unit.
Tel:86-574-62678766
E-mail:bzheng22@163.com
