水冷式空气压缩机在现场使用中,增设了断水保护装置,以保证设备在无水冷却的情况下能自动停车,避免断水烧缸事故的发生。以前,我们煤炭基建系统均采用传统的机械触点式开关作为空压机的断水保护(见图1)。当冷却水从一、二级缸水套流进溢水斗时,首先进入其中的漏水斗。水的冲击力和重量致使漏斗下移,其下移力通过系在漏斗上的尼龙绳的拉伸弹簧迫使接点A、B闭合,为空压机的起动做好准备。断水时,弹簧失去拉力而收缩,使A、B点断开,空压机跳闸而受到保护。这种断水保护的主要缺点是:随着使用时间的延长,弹簧的力量日渐变小,当断水时,弹簧丧失收缩的能力而 Water-cooled air compressors in the field of use, an additional water protection device to ensure that equipment in the case of anhydrous cooling can be automatically stopped to avoid water-cut cylinder accident. In the past, our coal infrastructure systems used traditional mechanical contact switches as the water protection for air compressors (see Figure 1). When the cooling water from the first and second cylinder water jacket flow into the overflow bucket, first enter one of the leaking bucket. The impact and weight of the water cause the funnel to move downwards, and its downward force forces the contacts A and B closed by the tension spring of the nylon rope tied on the funnel, preparing for the start of the air compressor. Water, the spring loses the tension and contraction, so that A, B point off, air compressor trip and be protected. The main disadvantage of this water protection is that as the service life increases, the force of the spring becomes smaller and smaller. When the water is interrupted, the spring loses its ability to contract