Crucible for reappearance of metal-carbon high-temperature eutectic point

A eutectic point and crucible technology, applied in crucibles and other directions, can solve the problems of eutectic pollution, easy extrusion damage, and many geometric constraints, and achieve the effects of reducing thermal stress, improving reliability and convenient installation.

Active Publication Date: 2015-04-29
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with this crucible structure is that there are too many geometric constraints between the inner shell and the outer shell, resulting in the bottom of the inner shell being constrained by the outer shell after thermal deformation at hi...

Method used

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  • Crucible for reappearance of metal-carbon high-temperature eutectic point
  • Crucible for reappearance of metal-carbon high-temperature eutectic point

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] The metal-carbon high temperature eutectic point reappearance crucible in the present embodiment, its material is graphite; Its structure is as follows figure 1 As shown, it includes: a crucible shell 1, a crucible lining 2, a crucible upper cover 3 and a thermometer well 4.

[0031] The structure of the crucible lining 2 is as figure 2 As shown, the upper port has an external thread, and the lower end of the crucible lining 2 is designed with a flange 6 . A neck structure 7 with a diameter smaller than the upper port is designed under the external thread of the upper port of the crucible lining 2, which is convenient for clamping and moving the uncooled crucible with crucible tongs.

[0032] Both the bottom of the inner cavity of the crucible lining 2 and the bottom of the flange 6 adopt a rounded corner transition design, the purpose of whic...

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Abstract

The invention relates to a crucible for reappearance of a metal-carbon high-temperature eutectic point and belongs to the field of high-temperature thermocouple verification or verification. The crucible is made from graphite and mainly comprises a crucible housing, a crucible lining, a crucible upper cover and a thermometer well. A flange is arranged at the bottom of the crucible lining, and the crucible lining can be directly sleeved with the crucible housing which is located above the flange, so that the mounting is convenient during use. The crucible housing prevents the phenomenon that the crucible lining cracks when the crucible is used at a high temperature so that a metal-carbon eutectic substance flows out, thereby playing a dual protection effect. Meanwhile, when the crucible lining deforms at a high temperature, the bottom of the crucible lining is not restrained by the crucible housing any more, thermal stress is reduced, and the reliability in use of the whole crucible is increased.

Description

technical field [0001] The invention relates to a crucible for reappearing a metal-carbon high-temperature eutectic point, which belongs to the field of high-temperature thermocouple verification or calibration. Background technique [0002] During the verification or calibration of high temperature thermocouples, the quality of the crucible structure design directly affects the final cycle times of the crucible, and indirectly affects the verification times of high temperature thermocouples, so special attention must be paid. [0003] At present, the mainstream crucible has the following two schemes in structural design: [0004] The first type adopts a bottle liner type double-layer shell structure, the inner shell is directly in contact with the metal and carbon (metal-carbon) eutectic, and the outer shell surrounds the inner shell to prevent the inner shell from The role of rupture eutectic leakage, such as Edler et al. in the literature "A cobalt–carbon eutectic fixed ...

Claims

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Application Information

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IPC IPC(8): B01L3/04
Inventor 吕国义刘裕盛杨永军张贺陈炜
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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