冷链物流网总结出四大方法检查冷库电磁阀,对冷库电磁阀的测试和检测主要有以下方面:
1、开启是否灵活
检测时可利用压缩空气或氨气和压力表,手动关闭作为调节压力,出口通入水池中,通入压缩机空气并观察压力表的指示,当压力达1.568MPa时,电磁阀通电后能正常开启,即说明正常。
2、关闭是否严密
正常情况下电磁阀在断电后靠弹簧力及阀芯重力应能自动关闭。按照上述测试方法,持续3-5min,若水池中无气泡泛出,则说明电磁阀关闭正常。
3、声音是否正常
正常的电磁阀开启时,有较响亮金属冲击声;关闭时,有“扑”的一声。若出现异常响声,则说明性能不良。
4、线圈是否良好
电磁阀线圈通电后,活动铁心吸起,此时的电压超过额定电压5%左右。连续运行时,线圈温升不超过60摄氏度,若温升过高,则说明线圈不良。
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