STATIONARY DEVICE FOR SUPPLY OF COOLANT IN COLD CHAMBER Russian patent published in 2016 - IPC F17C9/02 F25D3/10 

FIELD: cryogenics.

SUBSTANCE: invention relates to cryogenic engineering, namely to devices for pumping and filling liquid nitrogen, as well as for freezing of vacuum traps. Stationary device for supply of coolant in cold chamber contains at least one stationary Dewar vessel, each of which is equipped with flange and sealing circular gasket, located between end of neck of Dewar vessel and seat in flange, made with two branch pipes, located vertically above neck of Dewar vessel. Both branch pipes are made with internal thread in upper part, one of branches is filling one and it is tightly connected by thread with safety valve, made detachable. Second branch pipe is tightly connected by thread with plug, which is also detachable. Middle part of second branch pipe is made with internal thread and seat for upper threaded part of feeder, which is detachable and located coaxially to second branch pipe. Under plug and above upper threaded part of feeder in second branch pipe removal under ball valve chamber is made. Upper part of chamber is made with internal thread and is tightly connected with lower threaded part of nozzle. Flange of helical joint is attached to handles of Dewar vessel and is equipped with tight current leads connected with wires with heater and liquid nitrogen level sensor placed at distance of 30-50 mm above heater.

EFFECT: technical result of proposed technical solution consists in creation of stationary device for supply of coolant in cold chamber with possibility of continuous operation mode (for a long time) with large flow rate of liquid nitrogen (10 l/h) and installation of sensor, which allows to signal in advance on ending of liquid nitrogen in operating Dewar vessel.

1 cl, 3 dwg