Silent coring bit

The utility model discloses a mute coring drill bit, which belongs to the field of drill bits for bored pile construction and comprises a drill cylinder, a square head upper disc assembly is arranged at the top of the drill cylinder, a deslagging disc is arranged at the bottom of the drill cylinder, a plurality of conical heads are arranged at the center of the bottom of the deslagging disc, each conical head comprises a plurality of triangular plates distributed circumferentially, and the outer side walls of the triangular plates are blade parts. The square head upper disc assembly and the slag discharging disc are fixedly connected together through a plurality of dowel bars located in the drill cylinder, and a pressing disc is arranged at the upper end of the square head upper disc assembly; and a lower ring tooth head is arranged at the bottom of the deslagging disc. The mute coring bit is high in practicability and high in deslagging efficiency. 本实用新型公开了一种静音取芯钻头，属于钻孔桩施工用钻头领域，包包括钻筒，钻筒的顶部设置有方头上盘总成，底部设置有排渣盘，