Low-temperature fluid flow measurement and calibration device and calibration method
A flow measurement and calibration device technology, applied in measurement devices, liquid/fluid solids measurement, testing/calibration devices, etc., can solve problems such as the inability to achieve calibration accuracy, and achieve the goal of reducing calibration cost, sealing difficulty, and volume. Effect
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[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0048] Such as image 3 As shown, this embodiment shows a low-temperature fluid flow measurement and calibration device, which can be used for measurement and calibration of other low-temperature fluid flow meters such as liquid nitrogen and liquefied natural gas. It includes a liquid storage Dewar 1, a cryopump 2, a first subcooler 3, a second subcooler 5, a test box 4, and a w...
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