DE3516874A1 - REMOVABLE DEVICE FOR SUPPORTING TWO COMPONENTS CONTAINING AT LOWEST TEMPERATURE - Google Patents

Description

Nuclear Research Center Karlsruhe, May 8, 1985

Karlsruhe GmbH PLA 8522 Sdt / hr

ANR 1 002 597

Removable device for mutual support of two at low temperatures Components.

Removable device for mutual support of two components that are at the lowest temperature

The present invention relates to a dismountable device for mutually supporting two at cryogenic temperatures located and insulated from the outside temperature while maintaining a Cold bridge between the components, e.g. two superconducting ones Solenoid coils during the operating phase.

When operating superconducting magnets, which are approximately below 4 K operating temperature, are created by the magnetic coils very high forces. These forces must be due to the mutual support of the magnetic coils or their housings to avoid deformation.

The object of the present invention is to create a device with which two superconducting, i.e. magnets that are at very low temperatures in the range of 4 ° K are force-locked to accommodate the im Operation resulting, high magnetic forces can be connected. It is necessary to use this device easy to dismantle without having to interrupt or open the vacuum jacket of the solenoid. The insulation of the solenoid coils must be retained even when the device is removed, i.e. even then no Component that is below the lowest possible temperature come into contact with the outside temperature in order to avoid heat loss.

The present invention proposes to solve this problem with a device of the type described at the beginning Kind before the features that are listed in the characterizing part of claim 1 from a) to f). Further

Advantageous refinements of the subject matter of the invention consist in the features described in claim 2 under g) to h) are given.

A device designed in this way now allows it in a particularly advantageous manner. Way, the compressive forces at Record room temperature between two encapsulated components that are at the lowest possible temperature. Included there is also a continuous cold connection when installed, which is completely dependent on the outside temperature is isolated. Such a device fulfilling these conditions was not previously known.

Further details of the invention are explained in more detail below with reference to FIGS. Show it

FIG. 1 shows two superconducting magnet coils lying opposite one another without any connection to one another,

Figure 2 the same with inserted connection housing and separate cold bridge,

FIG. 3 shows the device according to FIG. 2 with a continuous cold bridge,

FIG. 4 shows the perspective view of a magnet

of Figure 1,

FIG. 5 shows the perspective view like FIG. 4,

but with the connection housing attached.

In the figure 1 are the connection points of the two superconducting and supercooled ones lying opposite one another Magnet coils 1 and 2 are shown in mirror image, with both connection points being the same. The figure 4 shows one of them in perspective.

The solenoids 1 and 2 are limited to the outside by the support structure 3 as an outer contour, which with a Supra-insulation 4 covered or by a Ν ~ - Shield is isolated. At the point of transmission there is a bevel on the support structure 3 inner pressure piece 30 is conductively attached, which in addition to the power transmission serves as a heat or cold connection. At a certain distance from the support structure 3 outside the insulation 4, the magnet coil is from a vacuum housing 40 surrounded, in the interior or space 26 there is a vacuum, which separates the room temperature for Lowest temperature of the solenoids 1.2 forms.

The wall is at the same height as the power transmission point of the vacuum housing 40 formed into a thickened flange 5, in the central opening 27 of which another round outer pressure piece 7 is seated, the center of which is aligned with that of the inner pressure piece 30, and which means a corrugated pipe compensator 6 is held elastically. The corrugated pipe compensator 6 is at one end is welded in a gas-tight inward direction in the opening 27 and holds the pressure piece 7 in the opening 27 by means of an intermediate plate 55 so that a distance or intermediate space 52 to the inner pressure piece 30 is formed. The other end 29 of the compensator 6 is gas-tight by means of the intermediate plate 55 on the circumference of the outer one Pressure piece 27 attached. This pressure piece 7 is positioned so that its outer surface 31 is slightly above the Outer contour 32 of flange 5 protrudes. The corrugated pipe compensator 6 has an extended length of around 800 mm, seen from the cold to the warm side.

Above the flanges 5 there is an opening 33 in the vacuum housing 40 introduced, which is closed with a cover 11 is, which on its inside 34 the holder or the displacement mechanism of a vertically movable wedge 8 carries. The wedge is beveled on one side 35 facing the magnet 1. His other side is formed vertically. The angle of the beveled side 35 corresponds to the angle of the beveled outer surface 37 of the inner pressure piece 30, the vertical surface 36 of the wedge 8 corresponds to the vertical one Inner surface 38 of the pressure piece 7. The distances between the surfaces 37 and 38 correspond approximately to the thickness of the Wedge 8. The wedge 8 is by means of a lamellar tube 12, the extended length of which from cold to warm at least 800 mm and the structure of which is shown in FIGS. 3 and 4, is connected to the threaded rod 13 and is guided in the holder 9, which in turn sits on the inside of the cover 11. The drive for the rotary movement the threaded rod 13 takes place by means of the bevel gear 39 screwed onto it and fixed to the housing 40, which is rotatable by means of the bevel gear 41. The bevel gear 41 is mounted in the wall 40 and can of can be turned on the outside after removing the cap 42 by turning the shaft 10 on the square 43.

The connecting housing 14 that connects the two pressure pieces 7 and can be inserted between them is in the Figures 2 and 3 used in section and shown in Figure 5 in perspective. The housing 14 is on on one side designed as a flange 54 and on the other side as a nozzle 45 with a guide surface 44, on which by means of a plain bearing 15 the

Flange 16 can be moved horizontally. A bellows 17 seals the interior space 46 between the housing 14 and the loose flange 16 from the outside. Means of the two screw devices 18, the flange 16 is moved back and forth. The three offset by 120 ° around the circumference Locking pins 19 center the middle pressure piece located in the middle of the housing 14 20, which will later be the cold bridge and pressure transmission or Connection between coils 1 and 2 with the outer ones Forms pressure pieces 7 and bridges their distance with its length. During centering, grip the below Locking pins 19 attached blocks 47 into recesses 48 of the middle pressure piece 20 (see Figure 5).

The pressure piece 20 has a guide wedge 21 on each side (see FIG. 5) and one opposite it Shoulder piece 22 and is surrounded on its outside 49 with supra-insulation 23. The locking pins 19, the by means of the threaded bushings 50 in the housing 14 can be screwed against the pressure piece 20, are during operation closed vacuum-tight with a cap 24, the housing 14 is for operation via the only as Line shown vacuum connection 25 evacuated.

The function of the removable device for cold support of the two magnetic coils 1 and 2 is now as it follows

For the frictional connection to be established between the two opposing magnet coils 1 and 2 is their starting position as shown in FIG. 1 and FIG. 4. The two coils 1 and 2 are at operating temperature held, i.e. they are at a very low temperature necessary for superconductivity in the range of

Chilled 4 ° K. The two inner pressure pieces 30 have direct contact with the cryogenic temperature. Because the wedges 8 (see Figures 1 and 2) are still extended or pulled upwards, have the lowest temperature inner Pressure pieces 30 still have no contact with the ones that are still at room temperature and that are under vacuum due to the ones that are under vacuum Inside space 26 insulated larger pressure pieces 7.

The connection housing 14 is now so between the magnet coils 1 and 2 or the vacuum housing 40 set (see Figures 2 and 3) that the middle pressure piece 20 the two by means of the corrugated pipe compensators 6 elastically mounted outer pressure pieces 7 with its guide wedges

21 (see Figure 5) pushes a little to the side and with the two shoulder pieces arched over their circumference

22 is supported on them and centered on the center of the pressure piece 7. Then the fixed flange 54 of the housing 14 with the flange 5 of the vacuum housing 40 from the magnetic coil 2, as shown in the figure, sealed and screwed to it. After that, the loose flange of the connection housing 14 by means of the screw devices 18 by sliding it on the guide surface 44 or the Move slide bearing 15 in the direction of flange 5 of magnet coil 1, pressed against it, sealed and screwed to it. The three locking pins 19 with the blocks 47 moved out of the recesses 48 and brought to the upper stop and with the cap 24 closed vacuum-tight. There is now no longer any thermally conductive connection between the middle one Pressure piece 20 and the wall of the connecting housing 14. Thereafter, the interior space 51 of the housing 14 is evacuated, the thermal insulation within the housing 14 is established.

If the vacuum in the inner space 51 is now at the same value as in the interior spaces 26 or at the desired value, the cold bridge can be closed. To be the two wedges 8 are moved by hand by turning the square 43 in the holder 9 downwards and into the space 52 pushed between the surfaces 37 and 38 of the pressure pieces 30 and 7 until the surfaces 35 and 36 are in close proximity Contact with the surfaces 37 and 38 and the cold bridge or a frictional connection of approx. 5000 kilo N or 5 MN (= 500 t) is made between the magnet coils 1 and 2 (see Figures 3 and 5). Do the pressure pads 27 If the lowest temperature is reached, the wedges are readjusted.

The cold bridge or support connection between the magnet coils 1 and 2 now consists of the inner pressure pieces 30, the wedges 8, the outer pressure pieces 7 and the middle pressure piece 20. These parts also have the Material cross-section of the corrugated pipe expansion joints 6 and the lamellar pipes 12 no direct connection to room temperature of the outer space 53 and are thermally insulated by the evacuated spaces 26 and 51. It ensures the extended length of parts 6 and 12 of 800 mm in relation to their small wall thickness in this too Area for sufficient insulation distance for which the temperature difference at these parts 6 and 12 without reduces major heat losses.

The connection housing 14 is removed in the opposite direction Series. After switching off the magnets, i.e. reducing the forces, the parts 8 are first pulled up. After a possibly necessary heating of the connection housing 14, the three locking pins 19 to the middle pressure piece 20 or the blocks 47 moved into the recesses 48 and the under vacuum standing interior space 51 open. Then the flanges 16 and 54 can be released and the entire connection housing 14 can be dismantled again.

- / 14-

List of reference symbols :

1 first solenoid 34 inside 2 second solenoid 35 sloping side 3 Support structure 36 vertical side 4th Super insulation 37 Exterior surface 5 flange 38 Inner surface 6th Corrugated pipe expansion joint 39 Bevel gear 7th outer pressure piece 40 Vacuum housing 8th wedge 41 Bevel gear 9 bracket 42 cap 10 drive shaft 43 Square 11th lid 44 Guide surface 12th Lamellar tube 45 Support 13th Threaded rod 46 inner space 14th Junction box 47 Chunk 15th bearings 48 Recess 16 loose flange 49 Outside 17th Bellows 50 Threaded bushing 18th Screwing device 51 inner space 19th Locking pins 52 Space 20th middle pressure piece 53 Outside space 21 Guide wedge 54 flange 22nd Shoulder piece 55 Intermediate plate 23 Super insulation 24 cap 25th Vacuum connection 26th Inner or intermediate space 27 opening 28 end 29 end 30 · inner pressure piece 31 Exterior surface 32 Outer contour 33 opening

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Claims (2)

Nuclear Research Center Karlsruhe, May 8, 1985 Karlsruhe GmbH PLA 8522 ijdt / hr ANR 1 002 597
Patent claims: Removable device for mutual support of two at low temperature, located and against the outside temperature of insulated components while maintaining a cold bridge between the components, E.g. two superconducting magnet coils during the operating phase, characterized by the following features: a) The thermal insulation, such as the _{support structure (3) of the two components (1, 2) insulated by supra-insulation, N 2} ~ shield or the like, is surrounded by a vacuum housing (40), the gap (26) being evacuated, b) through the thermal insulation (4) is on the support structure (3) of each component (1, 2) inner pressure piece (30) with angled outer surface (37) connected in a non-positive and thermally conductive manner, c) in the wall of the vacuum housing (40) is an outer pressure piece in alignment with the inner pressure piece (30) (7) elastically supported penetrating the wall, with an intermediate space (52) between the inner surfaces (38) the outer pressure pieces (7) and the outer surfaces (37) of the inner pressure pieces (30), d) wedges (8) are in the spaces (52) up to the are retractable, the sides (35, 36) of which correspond in their angle of inclination to that of the surfaces (37, 38), - 2 - e) between the walls of the vacuum housing (40) the two components (1, 2) with a fixed (54) and a loose flange (16), a connection housing (14) on the flanges (5) is vacuum-tight to the outside connectable, the interior (51) of which is evacuated is cash f) runs in the middle of the connection housing (14) centrically and with the pressure pieces (7) in alignment with a middle pressure piece (20), 'which with his Length bridges the distance between these and rests against them. 2. Apparatus according to claim 1, characterized by the other features: g) the middle pressure piece (20) is radial over its circumference by three radial locking pins (19) centered or held, which can be moved outwards away from the pressure piece (20), h) are on the two end faces of the pressure piece (20) each opposing guide wedges (21) and a shoulder piece arched over the circumference (22) available for installation support or centering.