Leakage detection device for diaphragm compressor

The utility model discloses a leakage detection device for a diaphragm compressor, which comprises a leakage connecting pipe, one end of the leakage connecting pipe is communicated with a three-way pipe, one end of the three-way pipe is fixedly connected with a pressure gauge, the other end of the three-way pipe is communicated with a branch pipe, one side of the branch pipe is fixedly connected with a pressure sensor, and one end of the branch pipe is communicated with a four-way pipe A; one side of the four-way pipe A is communicated with a diffusion passage pipe, one end of the diffusion passage pipe is fixedly connected with a stop valve, one end of the stop valve is communicated with a micro diffusion hose, one end of the micro diffusion hose is communicated with a four-way pipe B, and the other side of the four-way pipe A is communicated with an overflow passage pipe. By means of the needle valve, the needle valve can be adjusted according to the safe diffusion amount of actually compressed gas in the a