JPH046165Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a solenoid magnet in which a conductive wire is wound in multiple layers around a bobbin via an insulating sheet.

[Prior Art] For example, a superconducting solenoid magnet used in a nuclear magnetic resonance nuclear device has a container 1 as shown in FIG.
Liquid helium 2 is filled inside as a cooling medium,
Inside thereof, a superconducting metal wire 3 is wound around a bobbin 5 via an insulating member 4. FIG. 5 is a sectional view showing a superconducting metal wire 3 wound around a bobbin 5 made of aluminum, for example. 5 with an insulating member 4 interposed therebetween. Reference numeral 6 denotes an insulating sheet such as a polyester sheet or an epoxy sheet that is interposed between each layer for the purpose of interlayer insulation and aligned winding.

In such a configuration, when winding the superconducting metal wire 3 around the bobbin 5, the insulating sheet 6 is interposed below the superconducting metal wire 3, and one end of the bobbin 5 is wound as shown by the arrow in FIG. It is wound from part a to the other end b, and then the layers are changed and wound sequentially from end b to end a.

[Problems to be solved by the present invention] By the way, in such a superconducting solenoid magnet,
When the superconducting metal wire 3 is wound on the insulating sheet 6, the width of the insulating sheet 6 expands and contracts due to the winding pressure and the like. Therefore, as shown in FIG. 6, the insulating sheet 6
If the superconducting metal wires are too short, the superconducting metal wires will come into contact with each other, making it impossible to maintain interlayer insulation, or conversely, as shown in FIG. 7, if the superconducting metal wires are too long, they will protrude and the aligned winding will collapse at the end of each layer. Therefore, in order to prevent this kind of situation, in the past, if the insulating sheet was short, an additional strip-shaped insulating sheet was inserted, and if it was long, the end of the insulating sheet was cut off and rolled up. . Therefore, there was a drawback that the winding work was complicated.

The present invention has been developed in view of the above points, and an object thereof is to provide a solenoid magnet that can facilitate the winding work when winding a superconducting metal wire or the like of a bobbin, and thereby is easy to manufacture.

[Means for Solving the Problems] In order to solve these problems, the present invention provides a bobbin, a conductive wire wound on the bobbin in multiple layers, and each winding layer of the conductive wire. In a solenoid magnet equipped with an insulating sheet wound between the
The insulating sheet includes a first insulating sheet that covers the conductive wire wound thereon from the end of the bobbin at the start of winding to the vicinity of the end of the bobbin at the end of winding, and a first insulating sheet that covers only the end of the bobbin at the end of winding. The first insulating sheet and the second insulating sheet are arranged with a gap between them, and the ends of the first and second insulating sheets facing each other across the gap are formed in an uneven shape. and the convex portions of one of the insulating sheets are inserted into the concave portions of the other insulating sheet, thereby preventing contact between the layers of the conductive wire wound along the gap. It is characterized by this.

[Example] An example of the present invention will be described below in detail based on the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, the same components as in the conventional example shown in FIGS. 4 and 5 are designated by the same numbers and their explanations will be omitted. The insulating sheet 10 used in the embodiment shown in FIG. 1 is formed to have a width (+Δ=L) in consideration of the maximum elongation Δ of the insulating sheet when the conductive wire 3 is wound on the insulating sheet. ing. That is, the winding width L of the bobbin 5 is formed in advance to be shorter by the maximum elongation Δ, and furthermore, this insulating sheet 10 has sawtooth-like perforations near its ends so that it can be separated into the insulating sheets 10A and 10B. C is included. When winding using such an insulating sheet 10, first, the end of the insulating sheet 10A is attached to one end a of the bobbin 5, and the superconducting metal wire 3 is wound thereon. Then, as shown in FIG. 2, when the winding reaches the position of the cut C, there is a gap between the other end b of the bobbin 5 and the end of the insulating sheet 10B on the opposite side where the cut C is formed. If possible, the insulation sheet 1
0 is cut into an insulating sheet 10A and an insulating sheet 10B at the cut point C, and one of the separated insulating sheets 10B is brought into contact with the end b side of the bobbin 5 to continue winding. By the way, the sheet width of the insulating sheet 10 takes into account the maximum elongation width Δ that occurs during the winding process with the superconducting metal wire 3, as described above, so the width between the insulating sheet 10A and the insulating sheet 10B is The sawtooth gap 〓Δ′ formed in
This is the shrinkage of the insulating sheet 10A that occurs during the process of winding the superconducting metal wire 3 over the insulating sheet 10A. Furthermore, since one insulating sheet 10B is formed extremely short compared to the insulating sheet 10A, the expansion and contraction that occurs in the insulating sheet 10B can be ignored, and therefore the expansion and contraction of the insulating sheet 10 is absorbed. It can be rolled. Further, the gap Δ' formed between the insulating sheets 10A and 10B is not parallel to the winding direction but is formed in a sawtooth shape, and as shown in FIG.
Because it is formed 4 to 5 times the wire diameter of
The superconducting metal wire 3 does not fit between the layers, and insulation between the layers can be maintained. By interposing the insulating sheet formed in this way between each layer, the disadvantages of superconducting metal wires coming into contact with each other and not being able to maintain interlayer insulation, and the alignment winding being disrupted at the end of each layer's winding are eliminated. be done.

In the above embodiment, the case where the bobbin is wound with a gap part formed on the left side is explained, but when winding is to be done in the opposite direction, it is sufficient to form the gap part on the right side and wind the bobbin. .

In addition, in the embodiment described above, the insulating sheet 1
The separation lines of 0A and 10B were serrated as shown in FIG. 2, but they may also be shaped as shown in the dotted line E and dashed line F in FIG. The end shape is uneven,
In addition, it is sufficient if the relationship is such that one convex portion is inserted into the other concave portion.

Furthermore, in the above-mentioned embodiments, the case where a solenoid magnet is manufactured by winding the superconducting metal wire is illustrated, but the present invention can be similarly applied to a solenoid magnet made by winding a normal conducting wire.

[Effects of the Invention] As described above, according to the present invention, since the winding operation when winding a conductive wire around a bobbin with an insulating sheet interposed therebetween is facilitated, a solenoid magnet that is easy to manufacture is provided.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of one embodiment of the present invention, Fig. 2 is a diagram for explaining one embodiment, Fig. 3 is a diagram for explaining another embodiment, Figs. 4 and 5. is a configuration diagram for explaining the conventional example, and FIGS. 6 and 7 are diagrams for explaining the conventional example. DESCRIPTION OF SYMBOLS 1... Container, 2... Liquid helium, 3... Superconducting metal wire, 4... Insulating member, 5... Bobbin, 10
……Insulating sheet.

Claims (1)

[Scope of utility model registration request] A solenoid magnet comprising a bobbin, a conductive wire wound on the bobbin in multiple layers, and an insulating sheet wound between each winding layer of the conductive wire, wherein the insulating sheet is wound on the bobbin. A first insulating sheet that covers from the bobbin end on the winding start side to near the bobbin end on the winding end side of the conductive wire to be wound;
an insulating sheet and a second insulating sheet disposed with a gap between them, the ends of the first and second insulating sheets facing each other across the gap are formed in an uneven shape, and The convex portions of one of the insulating sheets are inserted into the concave portions of the other insulating sheet, thereby preventing contact between the layers of the conductive wire wound along the gap. Solenoid magnet.