本实用新型提供了一种使非组件的普通杜瓦侧放在真空系统中正常工作的装置。这种装置只要将单层不锈钢波纹管改为双层真空波纹管,并且管路足够长,就可以使任何普通杜瓦瓶能在4π立体角内正常工作,聚四氟乙烯管先作为输液氮管后又作为氮回气管,而双层真空波纹管与聚四 The utility model provides a device for normal work of a non-component ordinary dewar on a vacuum system. This device as long as the single-layer stainless steel bellows into double vacuum bellows, and the pipeline is long enough, you can make any ordinary Dewar can work within the 4π solid angle within the Teflon tube as the infusion of nitrogen After the tube as a nitrogen back to the trachea, and double vacuum bellows and poly four