This series of mud pumps is a crank-connecting rod structure, a three-cylinder single-acting horizontal piston pump, and the piston is lip-shaped and self-sealed, which is made of rubber or PTFE and nylon protective pads. The pump adopts an automobile gearbox, which is compact in structure, high in efficiency, durable, safe andreliable,convenient to maintain and low in maintenance cost. It is mainly used to supply flushing fluid in drilling core, coalfield geology, metallurgical geology and hydrogeology engineering holes. The flushing fluid can be divided into mud, clear water,etc,,and can also be used as a delivery pump for the above media.