Four-cavity or six-cavity diaphragm pump

The utility model relates to the field of agricultural plant protection and industrial cleaning machinery, in particular to a four-cavity or six-cavity diaphragm pump, and aims to solve the problems that the service life of the pump is influenced and the environment is polluted due to long-time occurrence of oil and water leakage caused by the fact that a diaphragm adopted by an existing engine oil lubrication type diaphragm pump is a plane type diaphragm. According to the scheme, a plurality of valve covers are evenly distributed on a box body in the circumferential direction, a diaphragm is arranged between each valve cover and the box body, a pump shaft penetrates through a pump cover and then is inserted in the middle of the box body, a diaphragm frame is arranged on the outer side of the pump shaft, each water outlet of a water inlet ring is connected with a water inlet of a water outlet ring through the valve covers, and an oil cup is communicated with the top of the box body; a movable rod barrel is ar