JPS6123952A - Turbine of nuclear magnetic resonance device - Google Patents

Abstract

PURPOSE:To easily mount and demount a sample by providing a surface to which air for flotation and air for rotation are blown, and arranging a sealing ring on the internal surface of a recessed hole into which a sample tube in the center of the axis is inserted. CONSTITUTION:The sample 12 is charged in the sample tube 4 and a turbine 2 which serves as a sample tube cap is fitted in the opening part of the tube 4. The recessed hole is provided in the surface of this turbine 2 where the sample tube 4 is inserted, and the ring 3 for securing airtihtness in the insertion of the turbine 2 is arranged on the inside surface of said hole. The opposite surface of the surface of the turbine 2 into which the sample tube 4 is inserted is flat and a suction surface during air suction. Thus, the sample is easily mounted and demounted.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a turbine for a nuclear magnetic resonance apparatus.

[Background of the invention]

Generally, a nuclear magnetic resonance apparatus rotates a sample tube set in it to average the non-uniformity of the magnetic field applied in the direction perpendicular to the rotation axis, and corrects only the non-uniformity in the direction of the rotation axis by using primary, secondary, and tertiary coils. By correcting the next, fourth, and even higher order terms, the improvement can be achieved by an order of magnitude or more. That is, in a nuclear magnetic resonance apparatus, the uniformity of the magnetic field is an extremely important item because it is directly linked to the resolution achieved by the apparatus.

FIG. 3 shows a sample rotation mechanism of a conventional nuclear magnetic resonance apparatus.

In the figure, a substance to be measured is placed in a sample tube 4 and bathed in a suitable solvent to make it liquid, and the sample tube 4 is sealed with a sample tube cap 5 to prevent the sample and solvent from evaporating. When the sample tube 4 is equipped with the turbine 2 and the spinning housing IK is inserted, the measurement sample in the sample tube 4 is positioned within the detection coil 14. When appropriate air pressure is applied to each of the sample rotating air inlet 6, floating air injection lower, and bearing air inlet 8 of the spinning housing 1 and air is injected, the rotating air outlet 9, the floating air outlet 10, Air pressure from the bearing air outlet 11 is applied to the sample tube 4 as bearing pressure, and to the turbine 2 as floating pressure and rotational pressure to rotate the sample tube 4. In addition, this sample rotation mechanism is located at the center of the magnet in the center of the probe and cannot be visually confirmed during operation, so as shown in Figure 4,
The turbine position and the length of the sample tube bottom must be set to predetermined values using the turbine position adjuster 15 or the like, and the sample tube must be inserted into the spinning housing 1.

In addition, as shown in Figure 5, some standard samples have sample tubes sealed with melted glass in order to avoid concentration and deterioration of the sample, but the length of the sample tube 4 is also not constant. As shown in FIGS. 3 and 4, the turbine 2 has a hole provided in its central axis with a sample tube 4 passed through it, and its position is set via a stopper ring 3 formed on the inner surface of the aperture. This is what we are doing.

Incidentally, in recent years, the performance of devices has improved, measurement modes have become more diverse, and devices have come to be controlled over a wide range of areas by computers. As a result, there has been a strong desire to computer-control the loading and unloading of a sample onto a probe in a nuclear magnetic resonance apparatus. Therefore, with the configuration of the sample tube 4, turbine 2, and sample tube cap 5 shown in FIG. 3, it is difficult to attach and detach the sample. In particular, it is not possible to use anything that disturbs the uniformity of the a-field as a means for attaching and detaching the sample.
This means that so-called robot hands cannot be used. Further, in the case shown in FIG. 4, adjustment of the length of the sample tube bottom and the turbine is complicated.

Furthermore, since the sample tube cap and the turbine are separate, a long sample tube is required. Furthermore, since the sample tube cap is first sealed after the sample is prepared, the turbine is inserted from the bottom of the sample tube.Therefore, eight suctions are required to clean the sample tube before inserting it into the probe.

[Purpose of the invention]

The object of the present invention was made in view of the above circumstances, and it is an object of the present invention to provide a turbine for a nuclear magnetic resonance apparatus that allows easy attachment and detachment of a sample.

[Summary of the invention]

In order to solve the above objects, the present invention (1) integrates a sample tube cap and a turbine. (2) Make the stopper ring function as a sample tube cap. (3) Eliminate length adjustment by keeping the length of the sample tube short and constant. (4) A flat surface is created on the upper surface of the turbine to serve as an adsorption surface, and the sample is attached and detached by air adsorption.

[Embodiments of the invention]

FIG. 1 is a block diagram showing one embodiment of a turbine of a nuclear magnetic resonance apparatus according to the present invention. In the figure, a sample tube 4 is open, and a sample 12 is filled in the sample tube 4. A turbine 2, which also serves as a sample tube cap, is fitted into the opening of the sample tube 4. A recessed hole is provided on the surface of the turbine 2 into which the sample tube 4 is inserted, and the inner surface of this hole is covered with a ring to ensure airtightness when the turbine 2 is inserted. 3 is arranged.

The surface of the turbine 2 opposite to the surface into which the sample tube 4 is inserted is flat, and is formed as an adsorption surface for air adsorption.

In this way, when sealing the sample tube 4, it is only necessary to fit the turbine 2 which also serves as a cap, and the turbine 2 in the parentheses
Since the sample tube 4 can be transported to a predetermined location by air suction together with the sample tube 4, the sample can be attached and detached extremely easily.

Further, in this case, since the length of the sample tube 4 under the turbine 2 is determined by the length of the sample tube 4 itself, it is possible to eliminate the need for an adjustment operation of the turbine position. .

By doing this, the length of the sample tube 4 can be shortened since the sample tube 4 is not structured to penetrate through the upper surface of the turbine 2.

Additionally, since the turbine 2, which also serves as a cap, is inserted into the upper end of the sample tube, the subsequent step of cleaning the sample tube can be omitted. Become.

FIG. 2 is a block diagram showing another embodiment of the turpin of the nuclear magnetic resonance apparatus according to the present invention. The configuration different from Figure 1 is
The inner diameter of the bearing part of the spinning nozzle has been increased,
The turbine also has a surface on the bottom surface that receives air from the bearing, making it possible to further shorten the length of the sample tube and increase the diameter of the bearing, resulting in less shaft vibration and better rotation of the sample. can get. The upper surface is a flat surface that serves as a suction surface, similar to that shown in FIG.

In the embodiment described above, the upper surface of the turbine 2 is configured to be flat so that it can be transported together with the sample tube 4 by air adsorption. It may also be possible to transport it by means of hooking the handle.

〔Effect of the invention〕

As is clear from the above explanation, according to the turbine of the nuclear magnetic resonance apparatus according to the present invention, it becomes possible to easily attach and detach a sample.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the turbine of the nuclear magnetic resonance apparatus according to the present invention, FIG. 2 is a block diagram showing another embodiment of the turbine of the nuclear magnetic resonance apparatus according to the present invention, and FIG. 3 is a block diagram showing the conventional turbine. A configuration diagram showing an example of a turbine of a nuclear magnetic resonance apparatus, No. 4
FIG. 1 and FIG. 5 are block diagrams 1 showing other examples of conventional nuclear magnetic resonance apparatuses, respectively. DESCRIPTION OF SYMBOLS 1... Housing, 2... Turbine, 3... Ring, 4... Sample blue, 5... Sample tube cap, 6...
...Rotating air inlet, 7...Floating air inlet, 8...
・Bearing air inlet, 9... Rotating air outlet, 10...
・Floating air outlet, 11...Bearing air 1 outlet, 12
... Sample, 13... Bobbin, 14... Detection coil, 15... Turbine adjuster. .

Claims (1)

[Claims] 1. A recessed hole in the center of the axis into which a sample tube is inserted, having a surface for blowing floating air and a surface for blowing rotating air, and a sealing ring on the inner surface of the hole. A turbine for a nuclear magnetic resonance apparatus characterized by comprising: 2. The nuclear magnetic resonance apparatus according to claim 1, wherein the surface on the outside of the surface on which the floating air is blown and the surface on the outside of the surface on which the rotating air is blown is formed as a surface on which bearing air is blown. turbine. 3. A turbine for a nuclear magnetic resonance apparatus according to claim 1 or 2, characterized in that it has an adsorption surface for transporting a sample.