DEVICE FOR ZONAL HEATING OF CRYOGENIC CONTROL APPARATUS Russian patent published in 2014 - IPC H05B1/02 

FIELD: heating.

SUBSTANCE: device for zonal heating of a cryogenic control apparatus, for example, of a shutting off element which comprises a hollow casing 1 fixed in the housing of a cryogenic cavity, a stem 2 mounted inside the casing, movable along it and connected by one end to the output of the stem travelling drive 3 and by the other end - to a shutting off element 4 which provides for the change of the flow passage section in the pipeline where liquefied gas is transported. At least one resistance heating element 11 and temperature sensor 12 are mounted on the outer side of the control apparatus casing 1. The heating element 11 and the temperature sensor 12 can be mounted on the drive 3 case as well. Additionally the device comprises a voltage regulator 13, a temperature selector 14 and a control device 15 connected by its first input to the output of the temperature selector, by its second input - to the output of the temperature sensor and by its output to the control input of the voltage regulator with the power input of the latter being connected to the input of a power supply source 16. For easier installation on the apparatus casing 1 the heating element 11 can be made annular and detachable in axial direction.

EFFECT: invention provides for uninterrupted equipment operation.

3 cl, 2 dwg