| abstract |
The invention discloses an improved cryogenic liquid nitrogen storage tank, belongs to the field of liquid nitrogen storage equipment, and solves the problem of waste caused by nitrogen discharge in the prior art, comprising a liquid nitrogen storage tank body, which comprises an inner tank, Outer tank, vacuum insulation cavity, neck tube, pressure gauge, nitrogen gas exporting mechanism; a vacuum insulation cavity is arranged between the inner tank and the outer tank, and a thermal insulation material is arranged in the vacuum insulation cavity; a pressure gauge is arranged on the left side of the top of the storage tank body, and the pressure gauge Connected with the inner tank; the top of the inner tank is connected with a neck pipe; a nitrogen gas outlet mechanism is arranged on the right side of the top of the storage tank body, one end of the nitrogen gas outlet mechanism is communicated with the inner tank, and the other end is installed with a stainless steel pipe; the stainless steel pipe is connected with two branches, the first One branch is connected with the circulating water tank, and the second branch is connected with the second nitrogen storage tank. The invention improves the use safety of the nitrogen storage tank, avoids the waste of resources caused by discharging nitrogen into the air, and can effectively prevent the staff from being frostbitten. |