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Quasi-adiabatic sealing type argon three-phase-point recurrence device

A triple point, heating film technology, used in measuring devices, measuring heat, thermometer testing/calibration, etc., can solve problems such as inability to meet high-precision temperature measurement, thermometer benchmark preservation, maintenance, and transfer effects

Inactive Publication Date: 2010-07-28
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing argon triple point device can no longer meet the development requirements for high-precision temperature measurement, which has a serious impact on the preservation, maintenance and transmission of thermometer references

Method used

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  • Quasi-adiabatic sealing type argon three-phase-point recurrence device

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Embodiment Construction

[0012] The advantages of the present invention will be more apparent through the following detailed description of the embodiments in conjunction with the accompanying drawings.

[0013] figure 1 It is a structural diagram of a sealed argon triple point device, which includes an outer cylinder 1 and an upper cover 2, and the outer cylinder 1 and upper cover 2 are made of stainless steel or other corrosion-resistant and pressure-resistant materials Composition, the outer cylinder 1 and the upper cover 2 can be in direct contact, or a rubber gasket or a metal gasket can be set between the outer cylinder 1 and the upper cover 2, and then fixed by bolts, so that the outer cylinder 1 and the upper cover 2 close contact between them, or the outer cylinder and the upper cover can be welded together by welding. Wherein, there are a plurality of openings on the upper cover 2, and these openings are respectively used for setting liquid nitrogen filling inlets, vacuum pumping inlets, th...

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Abstract

The invention relates to a quasi-adiabatic sealing type argon three-phase-point recurrence device, comprising an outer barrel body and an upper cover, and a three-phase-point vessel connected with the upper cover; a vacuum chamber is arranged in the vacuum chamber, the three-phase-point vessel is arranged at the center of the vacuum chamber, a first heating membrane is attached on the outer side surface of the upper part of the three-phase-point vessel, a radiation barrier is arranged between the vacuum chamber and the three-phase-point vessel, a second heating membrane is attached on the outer side surface and the bottom surface of the radiation barrier, a temperature equilibrium block is arranged at the lower part of the three-phase-point vessel, a plurality of jack channels for a pole platinum resistance thermometer well are arranged in the temperature equilibrium block, and jack channels for a sleeve pipe platinum resistance thermometer well are arranged at the center of the temperature equilibrium block; by adopting the structure, the argon three-phase-point recurrence device improves the recurrence accuracy in the experiments and application, the plateau warming duration is long, the detection efficiency is improved and the transmission of temperature criterion is ensured.

Description

technical field [0001] The present invention relates to a sealing device, more specifically, to a quasi-adiabatic sealing type argon triple point reappearance device, which can be used to establish a reference and standard device for the temperature range from -189°C to 0°C in the 90 international temperature scale to verify Graduated standard platinum resistance thermometer. Background technique [0002] The ITS-90 international temperature scale defines fixed points with a series of metal and non-metal substances. The temperature values ​​of these fixed points are given by the equilibrium temperature of the high-purity substance phase at a certain pressure. The ITS-90 international temperature scale has 6 fixed points in the temperature range of 13.8033-273.16K, of which the temperature range from 83.8058K to 273.16K involves the triple point of argon (83.8058K), the triple point of mercury (234.3156K), and the triple point of water (273.16K) a total of 3 defined fixed p...

Claims

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Application Information

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IPC IPC(8): G01K15/00
Inventor 孙建平刘植松邱萍张金涛
Owner NAT INST OF METROLOGY CHINA
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