Detachable one-way valve special for tunnel drainage pipe

A detachable one-way valve special for a tunnel drainage pipe is characterized in that internal threads or external threads matched with the tunnel drainage pipe are arranged at the right end of a connecting pipeline, a filter screen is arranged in the connecting pipeline, an upper blocking plate is arranged at the upper left end of the connecting pipeline and movably connected with the outer wallof the connecting pipeline, and a cross beam is arranged in the middle of the connecting pipeline; the one-way valve is in threaded connection with the tunnel drainage pipe, the upper blocking coverand the lower blocking cover are movably connected with the connecting pipeline, disassembly is convenient, the filter screen is arranged in the connecting pipeline, a small amount of silt entering the connecting pipeline is blocked on the left side of the one-way valve, and cleaning is convenient. The anti-blocking device can be popularized and applied to the field of tunnel blocking prevention and control. 一种可拆卸的隧道排水管专用单