Shearing flashboard with wall breaking function

The utility model provides a shear flashboard with a wall breaking function, which is applied to the technical field of blowout preventers and comprises an upper shear flashboard and a lower shear flashboard which are arranged in a cavity of a flashboard of a blowout preventer, and a second wall breaking blade is integrally formed at the cutting edge of the lower shearing flashboard in a protruding manner, so that shearing operation can be performed after a barrel structure at the shearing position of the drill rod is damaged, efficient shearing of the high-strength drill rod or a drill rod joint is realized, and the beneficial effects of improving safety and working efficiency and guaranteeing timeliness are achieved. 本实用新型提供了应用于防喷器技术领域的一种具有破壁功能的剪切闸板，包括用于设置在防喷器闸板腔室内的上剪切闸板和下剪切闸板，上剪切闸板的刃口处一体成型凸出设置有第一破壁刃，下剪切闸板的刃口处一体成型凸出设置有第二破壁刃，可以实现对钻杆剪切位置的筒体结构进行破坏后再进行剪切作业，实现了对高强度钻杆或钻杆接头的高效剪切，具有提升安全性、提升工作效率、保障及时性的有益效果。