Temperature control device and method for fixed current lead
A technology of temperature control device and current lead, applied in the direction of temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of unbalanced low temperature system, burnt diagnosis circuit, damaged structure, etc., and achieve a simple temperature control method , the effect of preventing burnout
Active Publication Date: 2021-07-13
安徽硕金医疗设备有限公司
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Problems solved by technology
[0003] The fixed current lead is a penetrating body from the 4K temperature range to the 300K temperature range in the superconducting magnet. Generally speaking, the resistance of the metal conductor will increase with the increase of the temperature. It will gradually increase the temperature of the fixed current lead itself. Under the action of the lifting field current of five or six hundred amperes, the heating temperature of the fixed current lead varies greatly from the 4K temperature range to the 300K temperature range. If the cooling medium is not considered In the 300K temperature range, the maximum temperature can exceed 800K or even higher, which is not good for the fixed current lead itself, which may damage its structure or burn out the diagnostic circuit, and at the same time make the low temperature system of the entire superconducting magnet out of balance and needs improvement
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Embodiment 1
[0033] Example 1: See figure 1 , a temperature control device for a fixed current lead, the temperature control device includes a computer control system 10, a temperature control system 12, an MMU control box 13, an alarm system 15, a ZBO heating power supply 19, a switch heating power supply 18, and an excitation power supply 21 , excitation cable 22, current lead wire 23, temperature sensor one 27, temperature sensor two 24, superconducting coil 26, switch heater 20, ZBO heater 28, liquid level gauge 29;
[0034] The computer control system 10 is connected to the first end of the MMU control box 13 and the first end of the temperature sensor 24 through the first node 11, and the second end of the MMU control box 13 is connected to the temperature control system 12 and the alarm system 15 through the second node 14, The third terminal of the MMU control box 13 is connected to the first terminal of the ZBO heating power supply 19 and the liquid level gauge 29 through the thir...
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The invention discloses a temperature control device and method for a fixed current lead, which relate to the field of current leads. The temperature control device comprises a computer control system, a temperature control system, an MMU control box, an alarm system, a ZBO heating power supply, a switch heating power supply, an excitation power supply, an excitation cable, a current lead, a first temperature sensor, a second temperature sensor, a superconducting coil, a switch heater, a ZBO heater and a liquid level meter. Compared with the prior art, the device has the advantages that the temperature of the fixed current lead can be effectively controlled in the field rising and falling process of the superconducting magnet, and FCL and other electronic circuits are prevented from being burnt out; the highest temperature in the field rising and falling process of the fixed current lead can be controlled below 300K; only low-temperature cold helium evaporated by liquid helium is used for cooling in the field rising and falling process of the fixed current lead, so that a cooling medium is simplified; the whole temperature control system of the fixed current lead can realize intellectualization; and the whole temperature control method is simple and safe.
Description
technical field [0001] The invention relates to the field of current leads, in particular to a temperature control device and method for fixed current leads. Background technique [0002] The current leads of low temperature superconducting magnets (MRI) can be pluggable or fixed. The plug-in current lead is separated from the superconducting magnet, and the positive and negative poles of the plug-in current lead are mechanically connected to the positive and negative poles of the superconducting magnet coil to form a current loop only in the process of lifting the field. The plug-in current lead is not connected to the superconducting magnet when the magnetizer is working normally; while the fixed current lead (FCL) is enclosed inside the superconducting magnet as a part of the superconducting magnet, and only the current lead is left outside Positive and negative terminals, only need to mechanically connect the positive and negative terminals of the external power supply ...
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IPC IPC(8): G05D23/20
CPCG05D23/20Y02E40/60
Inventor 金道明卞文龙智德波
Owner 安徽硕金医疗设备有限公司