JPH0745421A - Superconducting magnet device - Google Patents

Abstract

PURPOSE:To acquire a superconducting magnet device wherein the superconducting magnet can be placed both vertically and horizontally in a superconducting magnet device which includes a preliminary tank for cooling a refrigerant, a main tank wherein a superconducting magnet is contained, and a cooling pipe for feeding the refrigerant from the preliminary tank to the main tank, and wherein the refrigerant is circulated by connecting a reflux pipe from the main tank to the preliminary tank. CONSTITUTION:A preliminary tank 1 is arranged obliquely above a main tank 2, a cooling pipe 3 for feeding refrigerant is connected from a lower side of the preliminary tank to a lower part of the main tank, a reflux pipe 4 is connected from an upper side of the main tank to an upper side of the preliminary tank, and a superconducting magnet device is supported by a rotary shaft 8 provided to a base stand 7 at a central position of a weight including the preliminary tank 1, the main tank 2, the cooling pipe 3 and the reflux pipe 4 to rotate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting magnet device, and more particularly to a cooling structure for a superconducting magnet device which enables a vertically or horizontally placed superconducting magnet device.

[0002]

2. Description of the Related Art A superconducting magnet device capable of easily generating a strong magnetic field is used in various fields such as a manufacturing process for manufacturing various industrial products, a physical chemistry experimental facility, and further medical use. Plays an important role. By the way, in the superconducting magnet device that is widely used at present,
There are solenoid-type magnets in which superconducting wire is densely wound on a cylinder, and Helmholtz-type magnets with a structure in which they are divided in the axial direction.By specifying the direction of magnetic field generation, the magnetic field direction is relative to the floor surface. There are a vertical placement type superconducting magnet device in a vertical direction and a horizontal placement type superconducting magnet device in which a magnetic field direction is parallel to a floor surface.

These two types of superconducting magnet devices are
Conventionally, different types of superconducting magnet devices have been independently designed, and cannot be used as dual purpose.The vertical type superconducting magnet device and the horizontal type superconducting magnet device are respectively used according to the purpose of use. There was no choice but to prepare.

However, in recent years, there has been an increasing demand for the superconducting magnet device to be upsized and the magnetic field strength to be increased, and accordingly, the manufacturing process of the superconducting wire used in the superconducting magnet device is complicated, and the superconducting magnet device is kept at a low temperature. The difficulty of designing and manufacturing a cryostat for holding the superconducting magnet increases, and thus the superconducting magnet device becomes an extremely expensive device. It is not possible to separately prepare and use the above-mentioned two types of superconducting magnet devices according to the purpose of use. It is a difficult situation from an economic perspective.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a superconducting magnet device which has a vertical placement type superconducting magnet device and a horizontal placement type superconducting magnet device separately according to the direction of the magnetic field used. An object of the present invention is to provide a superconducting magnet device configured so that one unit can also be used.

[0006]

According to the present invention, in cooling a superconducting magnet with liquid helium, as shown in FIG. 1, a liquid helium 6 cooled obliquely above a main tank 2 containing a superconducting magnet 5 is used. The spare tank 1 for storing is arranged, and the cooling pipe 3 from the spare tank 1 is connected to the main tank 2
Connected to the bottom of the main tank 2 from the top of the return pipe 4
Is connected to the upper part of the spare tank to circulate the refrigerant by the thermosiphon method, and in order to use the superconducting magnet device both vertically and horizontally, the main tank that stores the spare tank and the superconducting magnet that is the cooled object is used. As shown in FIGS. 2 and 3, when the superconducting magnet device is placed horizontally or vertically, the spare tank 1 is always positioned above the superconducting magnet 5, and the superconducting magnet 5 is placed vertically. In either of the horizontal and horizontal types, the piping is constructed so that gravity and the thermosyphon effect can be used for circulating the refrigerant.

According to the present invention, the arrangement of the auxiliary tank 1 for storing and cooling the refrigerant and the main tank 2 and the connecting structure of the pipes for connecting the auxiliary tank 1 and the main tank 2 accommodating the superconducting magnet 5 are realized. It has become possible to use both the vertical type superconducting magnet device and the horizontal type superconducting magnet device. That is, when used as a vertical type superconducting magnet, as shown in FIG. 2, the refrigerant composed of liquid helium 6 of this embodiment flows out of the reserve tank 1 due to gravity, and the cooling pipe 3 is provided on the bottom surface of the main tank 2. Liquid helium 6 which is attached and flows in the main tank 2 is
To flow upward through the reflux pipe 4 attached to the upper surface of the main tank 2 by the thermosiphon effect and return to the spare tank 1.

Similarly, when used as a horizontal type superconducting magnet, as shown in FIG. 3, the refrigerant of liquid helium 6 flows out from the auxiliary tank 1, passes through the cooling pipe 3, and then reaches the bottom surface of the main tank 2. The main tank 2 is attached and the main tank 2 is filled, and the main tank 2 is passed through the pipe attached to the opposite position of the superconducting magnet to which the pipe is attached to return to the spare tank.

That is, according to the present invention, a spare tank for cooling and storing a refrigerant, a main tank containing a superconducting magnet, a spare pipe and a cooling pipe for circulating the refrigerant in the main tank,
In a superconducting magnet device consisting of a return pipe, a spare tank is placed diagonally above the main tank in a vertical position, and the cooling pipe that sends the refrigerant from the spare tank to the main tank is the bottom of the spare tank to the bottom of the main tank. Connected to the main tank, the return pipe for returning the refrigerant from the main tank to the spare tank is piped from the upper part of the main tank to the upper surface of the spare tank,
A superconducting magnet device, characterized in that a spare tank in which a refrigerant circulates, a main tank containing a superconducting magnet, a cooling pipe, and a reflux pipe are supported so as to support the entire center of weight and are rotatable. .

[0010]

[Operation] By the cooling pipe connected from the lower surface of the auxiliary tank, which is arranged diagonally above the main tank containing the superconducting magnet to cool the refrigerant, to the lower part of the main tank, the refrigerant cooled in the auxiliary tank is gravity-cooled in the cooling pipe. Is supplied to the bottom of the main tank, the refrigerant cools the superconducting magnet from the bottom of the main tank where the magnet is installed, and rises,
From the upper surface of the main tank to the upper surface of the spare tank, the temperature inside the recirculation pipe rises due to the thermosiphon effect, and returns to the spare tank again, and the refrigerant circulates in order to the spare tank, the cooling pipe, the main tank, and the recirculation pipe, Further, the superconducting magnet device can be installed vertically and horizontally by only supporting the superconducting magnet device by the rotation shaft on the base with the center of weight as the fulcrum of rotation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 and FIG. 5 are vertical type and horizontal type superconducting magnet devices for physical experiments manufactured according to the present invention, which are a vertical type superconducting magnet device and a horizontal type superconducting magnet, respectively. It is applicable when used as a device. Superconducting magnet 5 stored inside
Is a Helmholtz type magnet, and is immersed in liquid helium 6 which flows back through the reserve tank 1. The superconducting magnet has an inner diameter of 220 mm, an outer diameter of 400 mm, a coil inner-inner gap of 120 mm, and a total coil length of 1080 mm. Nb-Ti-based ultrafine multicore superconducting wire is closely wound so that a central magnetic field of 5T is generated. .

A main tank 2 containing a spare tank 1 and a superconducting magnet 5 shown in FIG. 4, a cooling pipe, a recirculation pipe 4, and a liquid helium 6 as a whole center of weight including a rotating shaft 8 on a base 7. In the case of a vertical type superconducting magnet device configured to swing and support in the center, the auxiliary tank 1 for storing the refrigerant is arranged diagonally above and directly above the main tank 2 containing the superconducting magnet 5, and the auxiliary tank 1 The cooling pipe 3 from the bottom surface of the main tank 2 is connected to the lower portion of the main tank 2 containing the superconducting magnet 5, and the upper surface of the main tank 2 is connected to the upper surface of the auxiliary tank 1 by the return pipe 4.
Liquid helium 6 circulates due to the thermosyphon effect, superconducting magnet 5 is always cooled below the superconducting critical temperature, and superconducting electricity becomes possible, and the central magnetic field is 5 as designed.
It was confirmed that T can be generated.

The superconducting magnet device shown in FIG.
In the case of the present invention, the auxiliary tank is located on the upper left end of the main tank 2 containing the superconducting magnet 5, and the liquid helium 6 is cooled from the auxiliary tank 1 by a cooling pipe. The superconducting magnet 5 in the main tank 2 is cooled via 3 and the refrigerant in the main tank 2 is returned to the auxiliary tank 1 due to the thermosiphon effect between the superconducting magnet 5 and the auxiliary tank 1 of the return pipe 4. Therefore, the refrigerant cooled in the spare tank 1 circulates in the main tank 2 so that the superconducting magnet is cooled to a temperature below the superconducting critical temperature so that the superconducting magnet 5 can be superconducting and the central magnetic field is 5T.
I confirmed that it can occur.

[0014]

As described above, the refrigerant reserve tank according to the present invention is disposed diagonally above the main tank containing the superconducting magnet, and the cooling pipe is connected from the refrigerant reserve tank to the lower surface of the main tank. By using a superconducting magnet device configured to circulate a pipe for passing liquid helium rising from the upper part of the thermosiphon to the auxiliary tank, the magnetic field direction of the superconducting magnet device, which was difficult to achieve in the past, was made horizontal to the floor surface. A superconducting magnet device that can be used in the vertical direction is easily and surely possible, and has a great role to play in the development of research and development under a high magnetic field environment.

[Brief description of drawings]

FIG. 1 is a layout diagram showing a cooling configuration of a superconducting magnet device according to the present invention.

FIG. 2 is a layout view showing a circulation path of a refrigerant when the superconducting magnet device is placed vertically.

FIG. 3 is a layout diagram showing a path in which a refrigerant circulates when the superconducting magnet device is placed horizontally.

FIG. 4 is a front view of a vertically placed and horizontally placed superconducting magnet device which is vertically placed.

5 is a front view when the superconducting magnet device shown in FIG. 4 is placed horizontally.

[Explanation of symbols]

 1 Spare tank 2 Main tank 3 Cooling pipe 4 Reflux pipe 5 Superconducting magnet 6 Liquid helium 7 Base 8 Rotating shaft

Claims (1)

[Claims] 1. A superconducting magnet device comprising a spare tank for cooling and storing a refrigerant, a main tank containing a superconducting magnet, a cooling pipe for circulating the refrigerant in the spare tank and the main tank, and a reflux pipe, The spare tank is placed diagonally above the vertically arranged main tank, and the cooling pipe that sends the refrigerant from the spare tank to the main tank is connected from the bottom of the spare tank to the bottom of the main tank. A return pipe for returning the refrigerant is piped from the upper part of the main tank to the upper surface of the auxiliary tank, and an auxiliary tank in which the refrigerant circulates, and a main tank containing a superconducting magnet,
A superconducting magnet device, characterized in that the cooling pipe and the reflux pipe are supported so as to support the entire center of weight thereof and are rotatable.