公开(公告)号：US4216554A

公开(公告)日：1980-08-12

申请号：US11505

申请日：1979-02-12

申请人： Albert J. Glueckert ,  Robert J. Honegger ,  Everett E. Nylund ,  Philip A. Saigh

发明人： Albert J. Glueckert ,  Robert J. Honegger ,  Everett E. Nylund ,  Philip A. Saigh

IPC分类号： B61D35/00 ,  E03D9/12 ,  E03D9/10

CPC分类号： E03D9/12 ,  B61D35/00 ,  Y10S4/03 ,  Y10T137/1044 ,  Y10T137/1353 ,  Y10T137/6877

摘要： A system to protect piping and containers from damage by freezing of contained aqueous liquid includes a temperature-actuated SPDT switch connected at its movable contact to a rechargable battery. The fixed contacts of the switch are connected to two input terminals of a DC motor of a motor-actuated valve having its valve opened or closed depending upon the operation of the switch. The movable contact normally engages the fixed contact that provides voltage to close the valve, if open, as the sensed temperature is above about 35.degree. F., but moves to the other fixed contact when the temperature drops to 35.degree. F. to open automatically the valve. A relay having a coil energized by AC power has a normally open contact coupling the motor and the fixed contact used to close the valve so that closing is inhibited, if the AC power is off, until power is on.

摘要翻译： 保护管道和容器免受含水液体冻结的破坏的系统包括在其可动触点处连接到可再充电电池的温度启动的SPDT开关。 开关的固定触点根据开关的操作连接到电动阀驱动阀的直流电动机的两个输入端，其阀门打开或关闭。 如果检测到的温度高于约35°F，则活动触点通常接合固定触点，提供电压关闭阀门，如果打开，则当温度降至35°F时，移动到另一个固定触点，自动打开 阀门。 具有由AC电力通电的线圈的继电器具有常开触点，该触点将电动机和用于闭合阀的固定触点相耦合，以便在电源接通之前交流电源关闭时禁止闭合。