Heat insulating vessel for low temperature liquefied gas pump

A heat insulating vessel for a low temperature liquefied gas pump, comprising an inner tank having a vertical axis and configured to accommodate low temperature liquefied gas, an outer tank provided externally around the inner tank, and a low temperature liquefied gas pump disposed inside the inner tank,

• wherein the outer tank has an outer tank upper part that is an upper end side portion thereof, and an outer tank main body other than the outer tank upper part,
• wherein a lid structure having a heat-insulated structure detachably fitted into an upper part of the inner tank is provided,
• the heat insulating vessel comprising:
• a first fastening part configured to fasten with bolts a first flange provided to upper ends of the inner tank and the outer tank upper part to a second flange provided to an outer circumferential part of the lid structure;
• and
• a second fastening part configured to fasten with bolts a third flange provided to an upper end of the outer tank main body to a fourth flange provided to a lower end of the outer tank upper part,
• wherein a vacuum insulating layer is formed between the inner tank and the outer tank.