Boiler circulating pump safety arrangement

The utility model relates to a boiler circulating pump safety arrangement comprises main circulating pump, stand -by circulating pump, pipeline, valve and control system. Main circulating pump and stand -by circulating pump include motor, shaft coupling and the pump body. Control system includes flow switch, relay and circuit. The utility model discloses a flow switch comes the control relay to open and close, and the motor of main circulating pump, stand -by circulating pump and air -blower is controlled respectively to the relay, can realize the unexpected termination of pumping of main circulating pump after, automatic start stand -by circulating pump, under the condition of main circulating pump and the equal termination of pumping of stand -by circulating pump, the air -blower auto -stop. 本实用新型涉及一种热水锅炉循环泵安全保护装置，由主循环泵、备用循环泵、管道、阀门以及控制系统组成。主循环泵和备用循环泵包括电机、联轴器和泵体。控制系统包括流量开关、继电器及线路。本实用新型通过流量开关来控制继电器启闭，继电器分别控制主循环泵、备用循环泵和鼓风机的电机，可实现主循环泵意外停泵后，自动启动备用循环泵，主循环泵和备用循环泵均停泵的情况下，鼓风机自动停机。