Cutting sleeve type pipe coupling sealed with rubber sealing ring

The utility model relates to a cutting sleeve type pipe coupling which is used in a piping system for oil, gas and general corrosive medium. The pipe coupling comprises a cutting sleeve, a cap nut and a coupling body. A sealing ring is arranged on the inner conical surface of the coupling body (1) which is screwed with the cap nut; a baffle ring, which is pressed on the cutting sleeve, is arranged on one end near the sealing ring and the coupling body. The utility model has the advantages of reliable sealing, good aseismatic performance, good resistance to the fluid pressure and convenient maintenance. The utility model is suitable for working in a high or low pressure or negative pressure condition, and even for connecting the coupling body with pipes which transport a caustic fluid.