Stifled device is prevented to concrete placement car pipeline

The utility model provides a stifled device is prevented to concrete placement car pipeline, pipeline that includes the downward sloping setting that is linked together with concrete placement car unloading pipe with lie in the output pipeline that pipeline low reaches level set up, the face laminating of pipeline's upper portion is provided with the filtering duct in the same direction as pipeline extending direction, and pipeline and filtering duct's binding face runs through and sets up a plurality of filtration pores. A stifled device is prevented to concrete placement car pipeline, set upfiltering duct, filter through the filtration pore, great block is blockked outside in the concrete, the block gets into the waste product conduit way through the filtering duct that the slope set up, regularly clears up, pipeline and filtration pore be difficult the jam all, the disposal costs of being convenient for are low, the clearance is convenient, is difficult for causing the pipe blockage phenomenon, this device