铸造车间输送白泥的管道以前经常堵塞,疏通费时费力,严重影响生产。经观察分析后发现堵塞与星形给料机和运送白泥的风机电路有很大关系。原电路(如图1所示)存在以下缺点:按下 QA_2后,风机起动,此时由于 C_2常开触点的闭合,操作者可以立即起动给料机。此时管道中的积灰及潮气均未吹去,极易造成堵塞。时间继电器 SJ 长期通电,既浪费电能又降 Casting workshop pipe delivery of white mud often blocked before, dredge time-consuming and laborious, seriously affecting the production. After the observation and analysis found that the blockage and the star feeder and the transport of lime mud circuit has a lot. The original circuit (as shown in Figure 1) has the following disadvantages: The fan starts when QA_2 is pressed, and the operator can immediately start the feeder due to the closing of the normally open C2 contact. At this point in the pipeline fouling and moisture have not blown away, easily lead to blockage. Time relay SJ long-term power, both waste of energy and down