Rotating joint special for ultra-low temperature fluid loading arm
A technology of fluid loading and unloading arms and rotary joints, which is used in fluid handling, equipment loaded into pressure vessels, and installation devices for container structures, etc. , to achieve the effect of increasing nitrogen flow and good sealing performance
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[0018] The present invention will be further described below in conjunction with the accompanying drawings.
[0019] As shown in the figure, a special rotary joint for loading and unloading arms of ultra-low temperature fluids includes a left flange 2, a right flange 16, an inner ring 8 and an outer ring 12, the left flange 2 is fixedly connected to the inner ring 8, and the right flange 16 is connected to the inner ring 8. The outer ring 12 is fixedly connected.
[0020] The inner ring 8 is provided with a heat-insulating cavity 11, the main static seal ring 1 and the active seal ring 18 are respectively installed between the inner ring 8 and the left and right flanges, and the outer wall of the inner ring 8 and the inner wall of the outer ring 12 are provided with Nitrogen purge passage 9 is provided with two annular raceways on the nitrogen purge passage 9, and a ball valve 10 that can rotate the inner and outer rings independently around the outer wall of the inner ring is...
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