Adjusting type electric valve with rhombic drift diameter

The invention discloses an adjustable electric valve with a rhombic drift diameter, belongs to the field of electric valves, and solves the problem that a common ball valve cannot accurately realize linear adjustment control on air flow. The valve comprises a valve body, a valve core and a valve cover, the valve core is rotatably connected in the valve body, the valve cover covers the valve body and the valve core, the valve core is connected with an electric actuator, the valve body is provided with a rhombic drift diameter, the valve core is provided with a rhombic hole, and the sectional area of the rhombic hole is equal to that of the rhombic drift diameter. According to the invention, the structure is simple and compact, the design of the rhombic drift diameter can realize linear regulation and control of the air flow, the regulation range is large, the metering precision is high, especially the control of the air flow in a municipal sewage treatment low-oxygen aeration control system has very important