On-line monitoring and alarming device for cutoff of cooling circulating water of mechanical seal of autoclave

The utility model provides a nickel oxygen pressure leaching autoclave mechanical seal cooling circulating water cutoff on-line monitoring and alarming device, which comprises a sealing water tank, the sealing water tank is communicated with a cooling circulating water delivery pump through a pipeline, the cooling circulating water delivery pump is communicated with an autoclave mechanical seal through a pipeline, and the sealing water tank is communicated with the autoclave mechanical seal through a pipeline. A first ball valve and a second ball valve are sequentially arranged on a pipeline between the first ball valve and the second ball valve, a third ball valve, a cut-off detection device and a fourth ball valve which are connected in series are arranged on the side portion of the second ball valve in parallel, the third ball valve, the cut-off detection device and the fourth ball valve are communicated through pipelines, and the third ball valve is communicated with an inlet of the second ball valve. The