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混流泵及卧式轴流泵泵站水泵引水时,需要提取真空。这项工作过去是靠人工进行操作的,既占用人力,又不方便。现研究出“火花塞压力找点开关”作为压力信号器,使泵站水泵引水抽真空实现了自动化操作。现介绍如下: 火花塞就是汽车上使用的火花塞,将它适当的改造一下就成了水泵引水抽真空用的“火花塞压力接点开关”。方法是用0.2mm厚的紫铜片剪成直径为12mm的圆片,然后根据火花塞接地极柱的厚度,在紫铜圆片边上剪一个豁口,再把剪了口的小圆紫铜片插入火花塞间隙内(口对着极柱),在口和极柱接触部位焊牢即可。小圆紫铜片与火花塞火线极端要保证有0.2mm的间隙,如图1所示。火花塞压力
Mixed Flow Pumps and Horizontal Axial Flow Pumps Pumps Pumps require a vacuum when they are being pumped. In the past, this work was carried out manually, taking up manpower and inconvenience. Now developed a “spark plug pressure to find a point switch” as a pressure signal device, so that pump pumping water pump vacuum to achieve the automation. Now introduced as follows: Spark plug is the spark plug used in the car, it will be appropriate to transform it into a water pump vacuum pump with “spark plug pressure switch.” Method is to use a 0.2mm thick copper sheet cut into 12mm diameter wafer, and then according to the spark plug grounding pole thickness, cut a notch on the edge of the copper wafer, and then cut the mouth of a small round of copper inserted into the spark gap Within the mouth (opposite the pole), in the mouth and pole contact area can be welded. Small round of copper and spark plug fire extreme to ensure there is 0.2mm gap, shown in Figure 1. Spark plug pressure