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A low-temperature liquid temperature and pressure measurement lead wire device

A temperature measurement, temperature and pressure technology, applied in the direction of measuring devices, measuring fluid pressure, thermometers, etc., can solve the problems of poor sealing effect, damage to measurement and control equipment, large heat leakage, etc., and achieve small measurement errors, good insulation and sealing performance, and leakage hot little effect

Active Publication Date: 2016-08-10
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sealing plug is generally used as the transition device for the temperature measurement lead wire, but when used in the liquid nitrogen temperature zone, it will cause relatively large heat leakage and the sealing effect is poor.
Generally, the metal capillary is directly used as the pressure measurement lead, which may damage the related measurement and control equipment when used in high voltage conditions.

Method used

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  • A low-temperature liquid temperature and pressure measurement lead wire device
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  • A low-temperature liquid temperature and pressure measurement lead wire device

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Embodiment Construction

[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] A lead device for measuring the temperature and pressure of cryogenic liquid proposed in this embodiment is used for real-time monitoring of the cryogenic liquid environment. Its structural model is shown in figure 1 As shown, the structural section diagram is as follows figure 2 As shown, it specifically includes a temperature measurement lead bushing 1, a pressure measurement connecting pipe 2, a first sealing flange 4, a second sealing flange 3, a first sealing member 7, a second sealing member 6, a nut 9 and a base 10;

[0030] like figure 2 As shown, the inner side of the base is provided with a first seal 7 and a second seal 6 in the axial direction; the bottom end of the first seal 7 is in the shape of an annular groove, which is used to match the top of the second seal 6 Protrusion; a first sealing fl...

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Abstract

The invention relates to a low-temperature liquid temperature and pressure measurement lead wire device, which includes a temperature measurement lead wire sleeve, a pressure measurement communication pipe, a first sealing flange, a second sealing flange, a first sealing member, a second sealing member, a nut and a base ; A first seal and a second seal are arranged axially inside the base; the bottom end of the first seal is in the shape of an annular groove, which is used to match the protrusion on the top of the second seal; the first seal and There is a first sealing flange between the second sealing parts; a second sealing flange coaxial with the first sealing flange is arranged in the second sealing part; the temperature measurement lead sleeve and the pressure measurement connecting pipe are a set , pass through the first sealing member and the second sealing member, and be welded on the first sealing flange and the second sealing flange; the top of the base is provided with a nut, and the nut is sleeved on the periphery of the first sealing member. The device of the invention is used to monitor the low-temperature liquid environment in real time, and the measurement is relatively accurate, and the invention has simple structure, convenient assembly and good insulation and sealing performance.

Description

technical field [0001] The invention belongs to the technical field of low-temperature superconductivity, and in particular relates to a lead wire device for measuring the temperature and pressure of a low-temperature liquid. Background technique [0002] The stable operation of superconducting power devices requires real-time monitoring of the cryogenic liquid environment. The signal measurement leads need to span from the room temperature region outside the cryostat to the low temperature region inside the cryostat, causing some heat leakage. For small superconducting power devices, it is of great significance to reduce the heat leakage as much as possible. In addition, when the signal measurement leads pass through the cryostat, they must also meet the requirements of electrical insulation, airtightness and pressure resistance. [0003] At present, the sealing plug is generally used as the transition device for the temperature measurement lead wire, but when used in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02G01L19/00G01K1/00
Inventor 李振明丘明
Owner STATE GRID CORP OF CHINA
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