The utility model belongs to the technical field of drilling rig equipment, and particularly relates to a detachable rod loading and unloading device for a
water well drilling rig, which comprises a support structure, a centering disc, a
tower fixing seat and a
drill rod unloading mechanism, the support structure is provided with a stepped groove and a first positioning hole and is detachably connected with the
water well drilling rig through the first positioning hole, and the centering disc is clamped in the stepped groove. The
tower fixing seat is provided with a through hole, the support structure is detachably connected with a
water well drilling rig, a
drill rod unloading mechanism hydraulic oil cylinder support, an adjustable hydraulic oil cylinder and a
drill rod unloading plate fork through the
tower fixing seat, the hydraulic oil cylinder support is fixedly connected with the support structure, and the two ends of the adjustable hydraulic oil cylinder are hinged to the hydraulic oil cylinder support and the drill rod unloading plate fork respectively through movable pin shafts. The device has the beneficial effects that the problem of uncontrollable concentric accuracy caused by
thermal deformation in an integrated
welding structure is solved, and the modular production and disassembly and
assembly of the device are facilitated at the same time.