Rotary drilling rig and counterweight device thereof

The invention discloses a rotary drilling rig and a counterweight device thereof. The counterweight device comprises at least two counterweight units, and the adjacent counterweight units are detachably connected. In the working process of the rotary drilling rig, the counterweight device matched with the rotary drilling rig is selected according to different properties of the rotary drilling rig.According to the counterweight device, due to the fact that the counterweight units are detachably connected, the counterweight device can be better matched with multiple functions of the rotary drilling rig; and due to the adjustability of the weight of the counterweight, the safety and stability of the whole machine under different working conditions can be better maintained, and therefore theuse stability of the rotary drilling rig is improved. 本发明公开了一种旋挖钻机及其配重装置，其中配重装置包括配重单元，配重单元至少为两个，相邻配重单元可拆卸连接。在旋挖钻机工作过程中，根据旋挖钻机不同性能，选择与其匹配配重装置。在本申请提供的配重装置中，由于配重单元可拆卸连接，配重装置可与旋挖钻机的多功能性匹配更佳。因配重重量的可调节性，可更好的维持整机在不同工况下的安全稳定性，因此，旋挖钻机的