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A Superconducting Liquid Level Gauge for Monitoring the Liquid Level of Cryogenic Refrigerant

A technology of low-temperature refrigeration and refrigerant, which is applied to liquid level indicators and buoy liquid level indicators for physical variable measurement, and can solve problems such as measurement accuracy problems

Inactive Publication Date: 2020-10-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a superconducting liquid level gauge for monitoring the liquid level of cryogenic liquid, solve the measurement accuracy problem of the superconducting liquid level gauge, significantly improve the measurement accuracy, solve the practical bottleneck

Method used

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  • A Superconducting Liquid Level Gauge for Monitoring the Liquid Level of Cryogenic Refrigerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Level gauge for liquid helium level monitoring.

[0029] After the NbTi superconducting wire is prepared into the U-shaped superconducting wire 2, the upper end of the NbTi superconducting wire is wound on the current lead 8 of the superconducting device 4 to form the liquid level gauge lead coil 7, and finally Connect the end of the NbTi superconducting wire to the measurement and control current connecting wire 9 . The measurement and control current connection line 9 is connected to the DC current terminal of the external measurement and control instrument, and an adjustable DC pulse current is used for measurement and auxiliary heating control (wherein, the auxiliary heating control is: after the current is passed into the superconducting wire, after Under the action of the current, the superconducting wire on the liquid surface of the cooling liquid 3 will generate heat. The larger the current, the greater the heat generated by the superconducting wire. At the same...

Embodiment 2

[0032] Level gauge for liquid hydrogen level monitoring.

[0033] like figure 1 Shown, MgB 2 After the superconducting wire is prepared into the U-shaped superconducting wire 2, the MgB 2 The upper end of the superconducting wire is wound on the current lead 8 of the superconducting device 4 to form the liquid level gauge lead coil 7, and finally the MgB 2The ends of the superconducting wires are connected to the measurement and control current connection 9 . A liquid level float 5 is inserted on the U-shaped superconducting wire 2, and the liquid level float 5 is placed on the liquid surface of the refrigerant 3, and the coil in the liquid level float 5 is connected to the The liquid level gauge lead coil 7 wound on the current lead 8 of the superconducting device 4, the heat of the current lead 8 of the superconducting device 4 passes through the float connection 6 and is buried on the liquid surface The coil in the float 5 automatically heats the part of the U-shaped su...

Embodiment 3

[0035] After the YBCO superconducting wire is prepared into the U-shaped superconducting wire 2, the upper end of the YBCO superconducting wire is wound on the current lead 8 of the superconducting device 4 to form the liquid level gauge lead coil 7, and finally Connect the end of the YBCO superconducting wire to the measurement and control current connection line 9 . A liquid level float 5 is connected to the U-shaped superconducting wire 2, and the liquid level float 5 is placed on the liquid surface of the refrigerant 3, and the coils in the liquid level float 5 are connected by a float connecting line 6. To the liquid level gauge lead coil 7 wound on the current lead 8 of the superconducting device 4, the heat of the current lead 8 of the superconducting device 4 passes through the float connection 6 and is embedded in the liquid The coil in the surface float 5 automatically heats the part of the U-shaped superconducting wire 2 above the liquid surface of the cooling liqui...

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Abstract

The invention discloses a superconducting liquid level meter for liquid level monitoring of a cryogenic coolant, and the superconducting liquid level meter is applied for the liquid level monitoring of a cryogenic coolant in a superconducting facility. The superconducting facility comprises a Dewar that is filled with the cryogenic coolant and provided with a superconducting device; and the superconducting liquid level meter comprises a U-shaped superconducting wire and a liquid level meter lead wire coil. The lower portion of the U-shaped superconducting wire is placed below the liquid levelof the coolant, and the upper portion of the U-shaped superconducting wire is placed above the liquid level of the coolant. The upper end of the U-shaped superconducting wire is connected to a signalvoltage connection wire. The liquid level meter lead wire coil is wrapped around a current lead wire of the superconducting device. The one end of the liquid level meter lead wire coil is connected with the upper end of the U-shaped superconducting wire, and the other end of the liquid level meter lead wire coil is connected with a test-control current lead wire. The invention achieves a superconducting liquid level meter for liquid level monitoring of cryogenic coolant with higher accuracy, high efficiency and high reliability, and solves the problem of measurement accuracy in the superconducting liquid level meter, improves the measurement accuracy and solves the bottleneck problem in the practical process.

Description

technical field [0001] The invention relates to the field of low temperature, in particular to a superconducting liquid level gauge for monitoring the liquid level of cryogenic cooling liquid, which is a liquid level monitoring technology and a measurement and control instrument for the cooling liquid in a superconducting device. Background technique [0002] 1.1 Background [0003] The superconducting liquid level gauge is a measurement and control instrument made of superconductor for monitoring the position or height of the refrigerant liquid level in cryogenic devices. [0004] At its critical temperature, the resistance of a superconductor is zero, and when the operating temperature rises above its critical temperature, the superconductor changes from a zero-resistance superconducting state to a normal resistance state. The change of the resistance conductor of the superconductor can be used to design an instrument device that is generally applicable to low-temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/24G01F23/44
CPCG01F23/24G01F23/44
Inventor 金建勋李雁帅贾敬朝王丽娜
Owner TIANJIN UNIV
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