To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the accompanying drawings to be used in the description of the embodiments will be briefly described below. Apparently, the drawings described hereinafter are some of the embodiments of the present invention, and a person of ordinary skill in the art can obtain other drawings according to these drawings without any creative effort.Fig. 1 is a schematic view of a large-flow plunger pump according to an embodiment of the present invention;Fig. 2 is a schematic view of the arrangement of a lubrication oil cooling water circulation system and an intelligent plunger packing lubrication system in the large-flow plunger pump according to an embodiment of the present invention;Fig. 3 is a schematic view of an upper detachable crosshead guide in the large-flow plunger pump according to an embodiment of the present invention;Fig. 4 is a schematic view of a plunger packing lubrication structure in the large-flow plunger pump according to an embodiment of the present invention;Fig. 5 is a schematic view of a damping valve in the large-flow plunger pump according to an embodiment of the present invention;Fig. 6 is a schematic view of crankshaft support roller assemblies in the large-flow plunger pump according to an embodiment of the present invention; andFig. 7 is a schematic view of a suction-pressure stabilizer of a cooling water coil arranged within the large-flow plunger pump according to an embodiment of the present invention,in which:1: upper detachable crosshead guide;1-1: positioning pin;1-2: fixing bolts;1-3: lower crosshead guide;2: plunger packing lubrication system;2-1: front guide sleeve;2-2: front packing;2-3: oil ring;2-4: rear packing;2-5: rear guide sleeve;2-6: gland nut;2-7: plunger;2-8: packing box;2-9: multi-point lubrication oil pump;2-10: check valve;2-11: pressure sensor;3: damping valve;3-1: valve plate;3-2: valve seat;3-3: damping ring;Q: volume cavity;K: pore;T: reinforcing plate;4: crankshaft support roller assembly;4-1: roller;4-2: adjusting screw;4-3: fixed mount;5: pull rod assembly;6: suction-pressure stabilizer;6-1: cooling water coil;7: crank-link mechanism;7-1: crank;8: cooling water inlet;9: high-temperature water outlet;10: domestic heat supply pipeline;11: water replenishing tank;12: plunger pump suction inlet;13: circulating cooling water inlet;14: upper cover plate;15: plunger pump oil pool cooling coil;16: box; and17: crosshead.