When horizontal sand mills are working, they often need to be shut down for cleaning due to blocked valves, and often many workers do not know how to clean up, and blindly wait for maintenance personnel to carry out maintenance operations, which not only delays production time, It will also cause the machine to be idle. In fact, valve clogging is a common failure, and the maintenance method is relatively simple. The general staff should learn and be able to perform manual maintenance when problems occur.
If the welding slag, rust, slag, etc. in the pipeline of the horizontal sand mill are blocked or stuck in the orifice, the guide part, and the balance hole of the lower bonnet, it is likely to cause the spool surface, Severe scratches and scratches on the guide surface will also cause pressure marks on the sealing surface. This blocking problem often occurs in the newly put into operation system and in the initial stage of operation after overhaul, which is also a relatively common failure. In case of such other problems caused by blockage, it is necessary to remove the shell of the grinder for cleaning, remove the slag first, and then damage the sealing surface and grind; at the same time, the sand will be The bottom plug is opened to flush out the slag that has fallen into the valve cover from the balancing hole, and to flush the pipeline. Before commissioning, let the regulating valve fully open, and the medium will flow into the normal operation after a period of time.
For some mediums that are easy to settle and contain solid particles, but the ordinary valve is used for adjustment, there is often a blockage in the throttle or the guide, and the external flushing gas and steam can be connected to the bottom plug of the lower valve cover. When the valve is blocked or stuck, open the external gas or steam valve to complete the flushing work without moving the regulating valve, making the valve operate normally.
