我厂使用的MTΠ-25型点焊机原采用自来水冷却,但自来水有时供应不正常。特别是在旱季时常限水,有时上班开机时有水,工作一段时间后突然停水,如果稍不注意,时间一长变压器就会因过热而烧坏。夏季由于自来水温度较低,空气湿度大,变压器冷却水管上凝结很多小水珠,这样不但会使一二次线圈短路,而且还会使变压器铁心生锈。针对上述问题,我们在修理变压器时,把冷却水管通道改成如图所示的的自循环水冷却,增加了一个水箱,水箱容积为22升。当点焊机工作时,变 My factory uses the MTΠ-25 spot welding machine used to tap water cooling, but sometimes the water supply is not normal. Especially in the dry season, often limited water, and sometimes work on the water when the boot, suddenly stop working after a period of time, if not pay attention, over time, the transformer will be overheated and burn out. Summer due to lower water temperature, air humidity, the transformer cooling water pipe condensation of many small drops of water, so that not only the first and second coil short circuit, but also make the transformer core rust. In response to the above problems, we repaired the transformer, the cooling water pipe into the self-circulating water cooling as shown in the diagram, an additional water tank, the tank volume of 22 liters. When the spot welding work, change