The invention relates to a fault alarm non-return drainage
system and non-return drainage method, belongs to the technical field of building
water supply and drainage, and solves the problem that backward flowing cannot be prevented when an existing
gravity drainage system is applied to
basement drainage. The fault alarm non-return drainage
system comprises a non-return valve, a non-return valve outer
pipe, a fault monitor, a monitoring
assembly and a
control system; the monitoring
assembly is used for monitoring the
water level state in the non-return valve outer
pipe; the
control system comprises a controller and an
alarm device; the controller is connected with the monitoring
assembly and the fault monitor, the controller is used for receiving
water level signals monitored by the monitoring assembly and information about whether the non-return valve breaks down or not monitored by the fault monitor and can judge whether the non-return valve breaks down or not, and an action instruction is sent to the non-return valve and the
alarm device according to the information whether the non-return valve breaks down or not. The drainage system and the method can be applied to
basement drainage, the problem that the drainage system fails due to the fact that the non-return valve mistakenly reports water blocking due to faults is solved, and the reliability of the drainage system is improved.