JP2007106342A - Space environment testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a space environment testing device having a refrigerant piping connection structure which is applicable to an opening/closing door which is moved straight, adaptable to any vacuum vessel having different sizes, and capable of sufficiently ensuring a work space around the opening/closing door. <P>SOLUTION: In the space environment testing device, an opening/closing door 13 is supported in a straight-movable manner by a guide rail 14 provided in the horizontal direction. Fixed refrigerant pipes 23, 24 in which liquefied nitrogen for cooling a door part shroud flows, and door part refrigerant pipes 17, 18 drawn outside the door from the door part shroud are connected to each other via bendable flexible heat insulating pipes 26, 27. The flexible heat insulating pipes are placed movably on an upper surface of a stage 25 supported from a ceiling part or a wall part in the horizontal direction above the opening/closing door. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a space environment test apparatus, and more particularly to a connection structure of a refrigerant pipe for supplying liquefied nitrogen, which is a refrigerant, to a door shroud inside an open / close door provided in a vacuum vessel body in the space environment test apparatus.

In order to simulate the cold and darkness of the universe, the space environment test equipment is provided with a shroud that is coated with black high emissivity coating on the inner periphery of a vacuum vessel that is evacuated to high vacuum and cooled by liquefied nitrogen. ing. As a connection structure of refrigerant piping (supply side piping and recovery side piping) for supplying liquefied nitrogen to the door portion shroud inside the open / close door supported to be opened and closed by a hinge at the axial end of the cylindrical vacuum vessel, By connecting a fixed refrigerant pipe through which liquefied nitrogen for cooling the door shroud flows and a door refrigerant pipe drawn out from the door shroud to the outside of the open / close door by a flexible flexible heat insulating pipe, 2. Description of the Related Art A space environment test apparatus that can open and close a door without attaching or detaching a refrigerant pipe is known (for example, see Patent Document 1).
JP 2003-137200 A

  However, the connection structure described in Patent Document 1 cannot be applied as it is to a space environment test apparatus that opens and closes the vacuum vessel body by moving the open / close door linearly. In addition, a part of the stage that holds the flexible heat insulating piping is fixed to the door side, and the remaining part is fixed to the vacuum vessel body side, so it is necessary to design and manufacture individually according to the size of the vacuum vessel. was there.

  Therefore, the present invention can be applied to a linearly moving opening / closing door, and can be applied even when the size of the vacuum vessel is different, and a refrigerant pipe connection that can sufficiently secure a working space around the opening / closing door. The object of the present invention is to provide a space environment test apparatus having a structure.

  In order to achieve the above object, the space environment test apparatus of the present invention has a main body shroud inside a vacuum vessel main body, and a door shroud inside an open / close door provided in the vacuum vessel main body, In a space environment test apparatus, a fixed refrigerant pipe through which liquefied nitrogen for cooling a part shroud flows and a door part refrigerant pipe drawn out from the door shroud to the outside of the door are connected by a flexible heat insulating pipe. The open / close door is supported so as to be linearly movable by a guide rail provided in a horizontal direction, and the flexible heat insulating pipe is movably mounted on an upper surface of a stage disposed in a horizontal direction at a position above the open / close door. The stage is supported from a ceiling portion or a wall portion of a storage body in which a space environment test apparatus is stored.

  Furthermore, in the space environment test apparatus according to the present invention, the flexible heat insulation pipe extends in parallel with each other in the moving direction of the opening / closing door from the connection part with the fixed refrigerant pipe and the connection part with the door refrigerant pipe. A pair of straight portions and a circular arc portion connecting the straight portions on the anti-connecting portion side, and with the movement of the opening and closing door, one straight portion is shortened and the other straight portion is expanded to be a circular arc portion. Is provided to move.

  According to the space environment test apparatus of the present invention, even in a space environment test apparatus that opens and closes the vacuum vessel main body by linearly moving the opening and closing door, the opening and closing door can be opened and closed without attaching or detaching the refrigerant pipe. In particular, the stage supporting the flexible heat insulation piping is supported by the storage space of the space environment test equipment, usually the ceiling or wall of the building where the space environment test equipment is installed, so that the floor portion below the stage is a work space. Can be used as Further, since the stage support member is separated from the vacuum vessel, if the moving distance of the opening / closing door is approximately the same, it is possible to cope with the size regardless of the size of the vacuum vessel.

  FIG. 1 shows an embodiment of the space environment test apparatus according to the present invention. FIGS. 1 and 2 are a plan view and a front view showing the space environment test apparatus in a state where the door is closed, and FIGS. It is the top view and front view which show the space environment test apparatus of the state which opened the door.

  A cylindrical vacuum vessel 11 constituting a space environment test apparatus includes a vacuum vessel main body 12 fixed to a floor portion with the vessel axis as a horizontal direction, and an open / close door detachably flange-connected to one end of the vacuum vessel main body 12. 13. The open / close door 13 is provided on a carriage 15 that moves linearly along the floor guide rail 14 laid in a direction parallel to the container axis. The open position of the open / close door 13 is the position of the guide rail 14. It is regulated by a stopper 14a provided at the end.

  Inside the vacuum vessel main body 12 and the open / close door 13, a main body portion shroud and a door portion shroud (both not shown) similar to the conventional one are provided, respectively, and the vacuum vessel main body 12 and the open / close door 13 are provided in each shroud. A main body refrigerant supply pipe 16, a main body refrigerant recovery pipe 17, a door refrigerant supply pipe 18 and a door refrigerant recovery pipe 19 are connected to each other through head tanks 12a and 13a projecting from the top of the main body.

  A main supply pipe 21 and a main recovery pipe 22 connected to a refrigerant supply means and a refrigerant recovery means (not shown) rise from the floor of the building where the space environment test apparatus is installed, and the main body refrigerant supply pipe 16 and The main body refrigerant recovery pipe 17 is branched from each of the main supply pipe 21 and the main recovery pipe 22 and is fixed by a hanging metal fitting or the like from the building ceiling.

  On the other hand, the door part refrigerant supply pipe 18 and the door part refrigerant recovery pipe 19, and the door side fixed supply pipe 23 and the door side fixed recovery pipe 24 branched from the main supply pipe 21 and the main recovery pipe 22, respectively, are a stage 25. Are connected via flexible heat insulating pipes 26 and 27 mounted so as to be movable. The stage 25 is provided with a plurality of support members 29 in a direction parallel to the container axis in an outer frame 28 assembled in four directions, and a building ceiling member such as a beam 30 and a building wall member such as a column. Is supported in a horizontal direction at a position above the opening / closing door 13 by a hanging metal fitting 31 attached to the door.

  The door part refrigerant supply pipe 18 and the door part refrigerant recovery pipe 19, and the door side fixed supply pipe 23 and the door side fixed recovery pipe 24 are arc-shaped when the flexible heat insulating pipes 26 and 27 are bent in an arc shape. It is provided on one end side (opening / closing door side) of the stage 25 with a distance larger than the minimum diameter, and the connecting direction of each tube to the flexible heat-insulating piping 26, 27 is the other end direction of the stage 25 (vacuum container). It is arranged to face the main body side).

  The flexible heat insulation pipes 26 and 27 are made of, for example, a well-known vacuum heat insulation flexible hose, and are connected to the door part refrigerant supply pipe 18 and the door part refrigerant recovery pipe 19, and door side fixed supply. A pair of linear portions 26a, 26b, 27a, 27b extending in parallel with each other in the moving direction (container axis direction) of the open / close door 13 from the connecting portions 23a, 24a with the pipe 23 and the door side fixed recovery pipe 24. And the semicircular arc portions 26c and 27c that connect the straight portions on the side opposite to the connection portion, and the arc portions 26c and 27c are slidably supported on the support member 29. Yes.

  In such a state, the flexible heat insulating pipes 26 and 27 placed on the stage 25 include a door part refrigerant supply pipe 18 and a door part refrigerant recovery pipe that move together with the door 13 when the door 13 is opened and closed. It deforms according to the position of 19. As shown by a solid line in FIG. 1, when the open / close door 13 is closed, the door refrigerant supply pipe 18 and the door refrigerant recovery pipe 19 enter the upper part of the stage 25, and the door refrigerant supply pipe 18 and the door refrigerant. The lengths of the straight portions 26 a and 27 a on the recovery tube 19 side are shorter than the straight portions 26 b and 27 b on the door side fixed supply tube 23 and the door side fixed recovery tube 24 side, and the arc portions 26 c and 27 c are formed on the stage 25. It is in the state located at the vacuum vessel body side end.

  When the open / close door 13 is opened from this state, the door 18 is connected to the door 18 in the process of moving the connecting portion 18a of the door portion refrigerant supply pipe 18 and the connecting portion 19a of the door portion refrigerant recovery pipe 19 to the position shown in FIG. The straight portions 26b and 27b on the side fixed supply tube 23 and the door side fixed recovery tube 24 side are gradually shortened, and the straight portions 26a and 27a on the door portion refrigerant supply tube 18 and door portion refrigerant recovery tube 19 side are gradually extended, The arc portions 26c and 27c gradually move from the vacuum vessel main body side of the stage 25 toward the open / close door side, that is, the opposite connection side of the linear portions 26b and 27b becomes a part of the arc portions 26c and 27c. The circular arc portions 26c and 27c are directed on the stage 25 in the moving direction of the open / close door 13 so that the straight portions 26a and 27a of 26c and 27c are opposite to the connecting portions of the straight portions 26a and 27a. A state that moves me. When closing the open / close door 13, the arc portions 26 c and 27 c move on the stage 25 in the opposite direction toward the vacuum vessel main body as the open / close door 13 moves.

  Therefore, the lengths of the flexible heat insulating pipes 26 and 27 are set according to the amount of movement of the arc portions 26c and 27c when the door 13 is opened and closed, and the door part refrigerant supply pipe 18 and the door part refrigerant recovery. The distance between the pipe 19 and the door-side fixed supply pipe 23 and the door-side fixed recovery pipe 24 is set to be equal to or greater than the distance corresponding to the minimum bendable diameter of the flexible heat insulating pipes 26 and 27.

  By adopting such a refrigerant pipe connection structure, the door portion refrigerant supply pipe 18 and the door portion refrigerant recovery pipe 19, the door side fixed supply pipe 23 and the door side fixed recovery pipe 24 are connected when the open / close door 13 is opened and closed. It is not necessary to attach or detach, and the opening and closing door 13 can be easily opened and closed. Moreover, since a leak test at the time of pipe connection and a temperature raising operation at the time of pipe removal are not required, the work required to open and close the open / close door 13 can be greatly reduced, and the work time can be greatly shortened.

  Furthermore, the stage 25 is arranged above the head tanks 12a and 13a of the vacuum vessel main body 12 and the open / close door 13, and the stage 25 is supported by the ceiling and the wall of the building that houses the space environment test apparatus. A sufficient working space around the environmental test apparatus can be ensured, and the opening / closing of the open / close door 13 and the loading / unloading of the equipment in the vacuum vessel main body 12 can be easily performed.

  Further, since the stage 25, the flexible heat insulating pipes 26, 27, etc. can be formed in a state independent of the cylindrical vacuum vessel 11, the same applies to the space environment test apparatus having different shapes such as diameter and length. A piping structure can be applied, and the manufacturing cost of the entire space environment test apparatus can be reduced. Further, the portion of the upper surface portion of the stage 25 that contacts the flexible heat insulating pipes 26 and 27 is processed so as to be in a low friction state, or is covered with a low friction material such as a fluororesin plate. The movement of the arc portions 26c, 27c can be smoothed.

  In addition, the structure and form of each shroud are arbitrary and are not particularly limited. The stage 25 is preferably horizontal, but may have a slight inclination that does not cause gas accumulation. Further, the upper surface of the stage 25 may be a flat plate, and the flexible heat insulating pipes 26 and 27 may be indirectly supported by the stage 25 by a member that moves smoothly on the flat plate. In addition, the opening / closing direction of the opening / closing door 13 may be a direction orthogonal to the container axis, and the opening / closing door 13 may be suspended.

It is a top view which shows the space environment test apparatus of the state which closed the door. It is also a front view. It is a top view which shows the space environment test apparatus of the state which opened and closed the door. It is also a front view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Cylindrical vacuum container, 12 ... Vacuum container main body, 12a, 13a ... Head tank, 13 ... Opening / closing door, 14 ... Guide rail, 14a ... Stopper, 15 ... Dolly, 16 ... Main part refrigerant supply pipe, 17 ... Main part Refrigerant recovery pipe, 18 ... Door part refrigerant supply pipe, 18a, 19a ... Connection part, 19 ... Door part refrigerant recovery pipe, 21 ... Main supply pipe, 22 ... Main recovery pipe, 23 ... Door side fixed supply pipe, 23a, 24a ... Connection part, 24 ... Door side fixed recovery pipe, 25 ... Stage, 26, 27 ... Flexible heat insulation piping, 26a, 26b, 27a, 27b ... Straight line part, 26c, 27c ... Arc part, 28 ... Outer frame, 29 ... support member, 30 ... beam, 31 ... hanging bracket

Claims (2)

  A stationary refrigerant pipe having a main body shroud inside the vacuum vessel main body, a door shroud inside the open / close door provided in the vacuum vessel main body, and through which liquefied nitrogen for cooling the door shroud flows; In a space environment test apparatus in which a door portion refrigerant pipe drawn from the door portion shroud to the outside of the door is connected by a flexible heat-insulating pipe, the open / close door is linearly moved by a guide rail provided in a horizontal direction. The flexible heat-insulating pipe is movably mounted on the upper surface of a stage disposed in a horizontal direction at a position above the opening / closing door, and the stage is mounted on a ceiling of a storage body containing a space environment test apparatus. Space environment test apparatus characterized by being supported from a wall or wall.   The flexible heat insulating pipe includes a pair of straight portions extending in parallel with each other toward a moving direction of the opening / closing door from a connection portion with the fixed refrigerant piping and a connection portion with the door refrigerant piping, and an anti-connection portion. An arc portion that connects the straight portions on the side, and with the movement of the door, one straight portion is shortened and the other straight portion is extended to move the arc portion. The described space environment test equipment.

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