Remote calibration device for differential pressure sensor of draw resistance detection equipment

The utility model provides a remote calibration device for a differential pressure sensor of draw resistance detection equipment. The remote calibration device comprises a remote control end, a cigarette-shaped hollow pipe, a pressure regulating valve or a draw resistance standard rod group, a first differential pressure sensor, a second differential pressure sensor, the draw resistance detection equipment and a flow unit integrated in the draw resistance detection equipment, the flow unit is used for generating standard flow; the cigarette-shaped hollow pipe is used for replacing a suction resistance standard rod; the inlet end of the pressure regulating valve or the suction resistance standard rod group is communicated with the atmosphere, and the outlet end is communicated with the inlet end of the cigarette-shaped hollow pipe; the first differential pressure sensor and the second differential pressure sensor are connected to the two ends of the cigarette-shaped hollow pipe. The remote control end controls