Cooling device for high-temperature magnetic resonance probe and application thereof

Abstract

The invention belongs to the technical field of high-temperature magnetic resonance probe cooling, and discloses a cooling device for a high-temperature magnetic resonance probe and application thereof. The cooling device comprises an upper cooling unit and a lower cooling unit, wherein the upper cooling unit comprises an outer barrel structure and an inner barrel structure; the inner barrel structure is sleeved with the outer barrel structure, and the two are in tight fit with each other; an inner surface of the outer barrel structure or an outer surface of the inner barrel structure is provided with a plurality of S-shaped channels which are uniformly distributed; the inner barrel structure is provided with a plurality of groups of water inlets and water outlets; the water inlets and thewater outlets are connected with two ends of the S-shaped channels; the lower cooling unit is arranged at the bottom of the upper cooling unit, and comprise an upper cover and a lower cover which arein tight fit with each other; a plurality of cooling channels are formed in the upper cover or the lower cover; and the lower cover is provided with a water inlet and a water outlet which are connected with the cooling channels. During application, the cooling device wraps the outside of the high-temperature magnetic resonance probe. Through adoption of the cooling device, omni-directional cooling can be realized for the high-temperature magnetic resonance probe, and the detection accuracy and the service life are ensured.

Description

technical field [0001] The invention belongs to the technical field of high-temperature nuclear magnetic resonance probe cooling, and more specifically relates to a cooling device for a high-temperature nuclear magnetic resonance probe and its application. Background technique [0002] High-temperature nuclear magnetic resonance is a technology that realizes nuclear magnetic resonance at high temperatures. This technology has important applications in the study of structural changes and chemical reactions of substances at high temperatures. At present, the high-temperature NMR probe used for high-temperature NMR generally includes a heating cavity inside and heat-insulating ceramics wrapped outside the heating cavity. A resonant coil is arranged in the heating cavity. in the magnet. [0003] At present, the general-purpose NMR magnets are generally superconducting magnets. Since the cavity of the superconducting magnet is narrower than that of the electromagnet, and there i...

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Problems solved by technology

[0003] At present, the general-purpose NMR magnets are generally superconducting magnets. Since the cavity of the superconducting magnet is narrower than that of the electromagnet, and there is a shim coil around the cavity of the superconducting magnet, if the high-temperature NMR probe is not properly If the temperature is lowered, the temperature of the shim coil will be too high, which will affect the stability of the magnetic field.

At the same time, because the temperature of the internal heating cavity of the high-temperature nuclear magnetic resonance probe is very high, which can reach more than 1500 degrees Celsius, it will cause a large temperature gradient inside and outside the heat-insulating ceramic. At different temperatures, the degree of expansion of the heat-insulating ceramic is different. Therefore, in There is a certain amount of internal stress inside and outside the heat-insulating ceramic. If the high-temperature NMR probe is not properly cooled, resulting in uneven temperature distribution around the heat-insulating ceramic, the possibility of the heat-insulating ceramic breaking due to uneven internal stress distribution will increase. improved, the service life is greatly reduced

In addition, the resonant coil generally passes through the bottom of the heat-insulating ceramic and is connected to the resonant circuit. After a period of use, the temperature will rise, which will damage the resonant circuit, and eventually affect the signal fed back by the resonant coil, thereby affecting the accuracy of the detection results.

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