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Free on-off vacuum valve device for high gas tightness and manufacture method thereof

A vacuum valve, high airtight technology, applied in valve device, lift valve, valve details, etc., to achieve the effect of reliable sealing performance, high sealing performance, and reducing the possibility of leakage

Active Publication Date: 2015-02-18
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For mechanical devices, the freedom of opening and closing and maintaining high airtightness are a pair of contradictions. For valve devices that are frequently opened and closed, this requirement is even more of a challenge.

Method used

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  • Free on-off vacuum valve device for high gas tightness and manufacture method thereof
  • Free on-off vacuum valve device for high gas tightness and manufacture method thereof
  • Free on-off vacuum valve device for high gas tightness and manufacture method thereof

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing and embodiment the specific embodiment of the present invention is described in further detail:

[0033] Such as figure 1 As shown, the invented vacuum valve device with free opening and closing and high airtightness is composed of a handle 1, a compression nut 2, a valve core 3, a compression ring 4, an upper seal 5, a valve body 6, and a gear nut 7 , anti-loosening screw 8, lower seal 31 and vacuum joint 9, characterized in that the valve body 6 is a hollow columnar body, the uppermost end of the inner hole is the valve body compression thread 17, which is next to the valve body compression thread 17 The inner circular surface and the stepped surface are respectively the valve body sealing inner circular surface 15 and the valve body sealing plane 16, the counterbore structure on one side of the valve body 6 is the valve body side interface 18, and the middle part of the inner hole of the valve body 6 is made with a The ...

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Abstract

The invention discloses a free on-off vacuum valve device for high gas tightness and a manufacture method thereof. The free on-off vacuum valve device comprises a handle, a gland nut, a valve plug, a compression ring, an upper seal, a valve body, a retainer nut, a backing-up screw, a lower seal and a vacuum fitting. The free on-off vacuum valve device is arranged between a vacuum chamber at the cold end of a refrigerator and a vacuum pump for negative pressure exhaust, and controls the switch between a dead vacuum environment and a live vacuum environment. The free on-off vacuum valve device has the advantages of small number of parts, convenient operation and easy maintenance, and achieves the safe, reliable and oil-free dynamic seal effect. Through adoption of the free on-off vacuum valve device, the contradiction between the need for frequent on-off and the continuation of high gas tightness in the vacuum chamber in the practical application of a low-temperature refrigerator is solved. The invention has a very positive effect on the practical application of the low-temperature refrigerator.

Description

technical field [0001] The invention relates to a vacuum valve, in particular to a vacuum valve device capable of free opening and closing and high airtightness and a manufacturing method. Background technique [0002] The acquisition and maintenance of high vacuum has special significance for the low temperature field. For example, in cryogenic refrigerators that have been widely used in practice, the temperature difference between the low temperature end and the room temperature is generally above 180K, and sometimes the temperature difference is even close to 270K. With such a huge temperature difference, without the use of vacuum insulation, the heat loss caused by conduction and convection of the air flow will make a cryogenic refrigerator useless. Therefore, in practical applications, the cold end of the cryogenic refrigerator is generally placed in a vacuum chamber. [0003] Optical sensing devices (such as infrared sensors, etc.) and superconducting electronic devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/36F16K1/32F16K27/02
CPCF16K1/00F16K1/32F16K1/36F16K27/02
Inventor 党海政
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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