Flushable semi-automatic water guide and pressure relief structure

The utility model discloses a flushable semi-automatic water guide pressure relief structure which comprises a foundation slab, a water guide pipe and a water guide pipe. The well top cassette is arranged on the upper side of the interior of the foundation slab, one side of the well top cassette is communicated with a flow guide pipe, and the bottom of the well top cassette is communicated with a filter element rod; the outer surface of the filter element rod is coated with the filter unit, and water in the drain hole is filtered by the filter unit and the filter element rod in sequence and then enters the well top cassette; and the flushing unit is arranged on the filter element rod in a penetrating manner, and the flushing unit can be used for flushing deposits at the bottom of the filter element rod and the bottom of the foundation slab. The device has the advantages of being small in structural limitation, short in construction period, low in investment cost, quick in effect, capable of being maintained a