JPH1176373A - Door unit for pressure container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable installation within a small space and further to prevent a worker from touching the rear face of a high-temperature door. SOLUTION: A fore panel 6 consisting of the front face of a sterilizing container 1 and a door 7 for opening/closing an opening part 5 of this sterilizing container 1 are respectively formed partially cylindrical. When the opening part 5 is opened while horizontally moving this door 7, this door 7 is moved to the side and simultaneously moved back as well. Therefore, this door 7 is not remarkably protruded to the side of the sterilizing container 1 even at opening time and the rear face of the door 7 is not exposed on the side of the worker, either.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The door device for a pressure vessel according to the present invention is incorporated in, for example, a large-sized steam sterilizer and used to hermetically close the opening of the sterilization vessel.

[0002]

2. Description of the Related Art Various sterilizers are widely used in hospitals or in factories and laboratories related to pharmaceuticals and foods for sterilizing medical instruments and laboratory instruments. Among such sterilizers, as a sterilizer for processing a large amount of materials to be sterilized at a time, a high-temperature, high-pressure container is placed in a sterilization container, which is a pressure container capable of carrying a material to be sterilized together with a cart (cart). Steam sterilizers that perform heat treatment of the above-mentioned object to be sterilized by sending water vapor are widely used. The sterilization container has an opening at the front in the horizontal direction, and the object to be sterilized can be freely inserted into and removed from the sterilization container through the opening. Therefore, the above-described steam sterilizer is provided with a door device so that the opening can be freely opened and closed.

Conventionally, the following three types of door devices have been generally used as such door devices. The door is pivotally supported by a hinge with respect to the sterilization container. A door that can be freely moved (slided) vertically or horizontally in a sterile container. The door is divided into a plurality of door elements, and when opened, the door is bent and stored above the sterilization container.

[0004]

In the case of the conventional structures as described above, there are the following problems to be solved. First, in the case of the structure shown in (1), when opening and closing the opening of the sterilization container, the space for the door to move is large, and in order to open and close the opening, the front and side of the opening of the sterilization container are opened. It is necessary to secure a large space. or,
As the door is moved in the opening direction, the inner surface of the door faces the operator. In the case of the door of the steam sterilizer, immediately after the end of the sterilization operation, the inner surface of the door is heated by the steam for sterilization and is in a state where the temperature is raised (because the outer surface is covered with a heat insulating material and a cover, The temperature has not risen so much.) For this reason, if the worker's body touches the inner surface of the door, there is a possibility of getting burned. Next, in the case of the structure shown in (1), it is necessary to secure a space for moving the door on the side or above the sterilization container, which has substantially the same area as the sterilization container. For this reason, the installation space increases, and the place where the installation can be performed is limited. Further, in the case of the structure shown in above, it is not only difficult to secure the rigidity and pressure resistance of the door divided into a plurality of door elements, but also it becomes impossible to install a pipe or the like above the sterilization container. . That is, in the case of a large-sized steam sterilizer, a pipe for supplying and discharging steam and a vacuum pump for making the inside of the sterilization container a negative pressure are often installed above the sterilization container. On the other hand, in the case of the structure shown above, since the door enters above the sterilization container,
It becomes necessary to install the above piping and vacuum pump at another location,
As a result, the installation space of the steam sterilizer increases. The door device for a pressure vessel of the present invention has been invented to solve any of the problems described above.

[0005]

The pressure vessel door device of the present invention has an opening, similarly to a conventionally known pressure vessel door device, and has a negative pressure or an internal pressure during use. A pressure vessel for positive pressure and a door for hermetically closing the opening of the pressure vessel are provided. In particular, in the pressure vessel door device of the present invention, the front surface of the pressure vessel surrounding the opening is a convex curved surface located on a single cylindrical surface, and the door extends along the front surface of the pressure vessel. This door is formed in a partial cylindrical shape having a shape, and the opening side is open at one circumferential end of a convex curved surface constituting the front surface of the pressure vessel, and the door is closed by the door. A fixed-side locking member is fixed to prevent one end of the door from being displaced away from the front surface by engaging one end in the circumferential direction of the partial cylindrical shape. Further, at the other end of the convex curved surface that constitutes the front surface in the circumferential direction, a locking projection that protrudes from the outer surface of the pressure vessel in the circumferential direction of the single cylindrical surface is fixed, and the door is fixed. The other end of the partial cylindrical shape in the circumferential direction is engaged with the locking projection while the opening is closed by the door, and the other end of the door is displaced in a direction away from the front surface. , And the movable side locking member is fixed. Further, the door opens and closes the opening by moving along an arc-shaped guide rail having the same center as the door and the front surface.

[0006]

In the pressure vessel door device of the present invention having the above-described structure, when the door is moved in the opening direction along the guide rail, the door moves in the direction of retreating from the opening, Also move backwards. Therefore, even when the opening of the pressure vessel is fully opened, the amount by which the partial cylindrical peripheral other end of the door projects to the side of the pressure vessel is smaller than the width dimension of the door. I'm done. As a result, the space required to move the door to open and close the opening can be reduced. Further, the rear surface of the door is not exposed to the worker even when the opening is opened. Therefore, even when the temperature of the rear surface of the door rises, the operator does not touch the rear surface and suffer burns. Further, the partial cylindrical door has better pressure resistance than a flat door that has been generally used in the past. For this reason, the thickness of the door and the number of reinforcing members required to secure the required pressure resistance can be reduced, and the weight of the door can be reduced.

[0007]

1 to 3 show an example of an embodiment of the present invention. The sterilization container 1, which is a pressure container, has a double structure in which a heating jacket 4 is provided between the inner can 2 and the outer can 3. During the sterilization operation during use, the sterilization container 1 is used as the sterilization process proceeds. The gas in the can 2 is discharged to make the inside of the inner can 2 negative pressure, or steam for sterilization is sent into the inner can 2 to make the inside of the inner can 2 positive. Such a sterile container 1 is
An opening 5 is provided in the front in the horizontal direction (below in FIGS.
That is, a front plate 6 entirely formed in a rectangular frame shape is welded and fixed to the front surface of the sterilization container 1 so as to span the front edge of the inner can 2 and the front edge of the outer can 3. Opening 5
Is a portion surrounded by the inner peripheral edge of the front plate 6. The horizontally moving door 7 allows the opening 5 to be hermetically closed.

The front surface of the front plate 6 (the lower surface in FIGS. 2 and 3) corresponding to the front surface of the sterilization container 1 surrounding the opening 5 is a convex curved surface located on a single cylindrical surface. That is, the front plate 6
Are formed in a partial cylindrical shape, the front surface of which is convex. The door 7 has a shape along the front surface of the front plate 6, that is, a partial cylindrical shape having a radius of curvature slightly larger than the radius of curvature of the front plate 6. Such a front plate 6
And the rear surface of the door 7 (the upper surface in FIGS. 2 and 3) abuts via a packing (not shown) with the opening 5 closed.

The packing is locked in a locking groove (not shown) formed on the front surface of the front plate 6 so as to surround the entire periphery of the opening 5. At the bottom of this locking groove,
Also, a negative pressure or a positive pressure can be introduced through a supply / discharge path (not shown). When opening and closing the door 7, a negative pressure is introduced into the bottom of the locking groove to draw the packing into the locking groove, thereby preventing the packing from rubbing against the rear surface of the door 7. I do. On the other hand, when steam for sterilization is fed into the inner can 2, a positive pressure gas such as steam is fed into the locking groove, and the packing projects from the locking groove. Then, this packing is abutted against the rear surface of the door 7. Since the structure and operation of the so-called floating seal, in which the packing is freely inserted into and retracted from the locking groove, are well known in the field of steam sterilizers, illustration and detailed description are omitted. I do.

A fixed locking member 8 is welded and fixed to one end of the front surface of the front plate 6 in the horizontal direction (left end in FIGS. 1 to 3). The fixed side locking member 8 is connected to the opening 5
1 is fixed to the front surface of the front plate 6 over the entire length in the height direction, has an L-shaped cross section, and has the opening 5 (FIG. 1).
3 are open. Such a fixed side locking member 8 engages one end in the horizontal direction (left end in FIGS. 1 to 3) of the door 7 in a state where the opening 5 is closed by the door 7, and Is prevented from being displaced in a direction away from the front surface.

The other end of the front plate 6 in the horizontal direction (FIG. 1)
1 to 3) are on one side of the sterilization container 1 (FIGS. 1 to 3).
3 (right side of FIG. 3) in the extension direction of the single cylindrical surface to form a locking projection 9. A movable locking member 10 is fixed to the other end of the door 7 in the horizontal direction (right end in FIGS. 1 to 3) by welding. This moving side locking member 10
Engages with the locking projection 9 in a state where the opening 5 is closed by the door 7, and prevents the other end of the door 7 from being displaced away from the front surface.

Further, above the door 7, an upper guide rail 11 (only shown in FIG. 1; omitted in FIGS. 2 and 3) for suspending and guiding the door 7 is provided. On the lower side, a lower guide rail 1 for guiding the lower part of the door 7
8 are provided respectively. The upper and lower guide rails 11 and 18 are formed in an arc shape having the same center as the door 7 and the front plate 6. With the door 7 closing the opening 5, the upper and lower end edges of the door 7 are prevented from being displaced away from the front plate 6 by the guide rails 11 and 18. That is, the guide rails 11 and 18 not only guide the door 7 but also function as locking members that prevent the door 7 from separating from the front surface of the front plate 6 when closed. The upper edge of the door 7 supports a pair of hanging rollers 12, 12, and by engaging these hanging rollers 12, 12 with the upper guide rail 11, the door 7 is moved. The opening 5 can be freely opened and closed by moving along the upper guide rail 11. In the illustrated example, a stopper 13 is provided on one side surface of the sterilization container 1,
The door 7 moved to the closed state shown in FIG. 2 is prevented from being accidentally moved in the opening direction. The stopper 13 is configured such that the blocking arm 15 can be advanced and retracted into and out of the moving space of the door 7 by an actuator 14 such as an air cylinder operated by high-pressure steam introduced into the sterilization container 1. Further, similarly to the upper guide rail 11, the lower guide rail 18 may be provided so as to protrude to the side of the sterilization container 1 (to the right in FIGS. 1 to 3).

In the illustrated example, the opening and closing operation of the door 7 can be performed by an electric motor 16. For this purpose, an arc-shaped rack (not shown) is provided over the front of the door 7 over substantially the entire width of the door 7. Further, the electric motor 16 is supported and fixed to a fixed portion such as an upper portion of the front plate 6 by a support bracket (not shown), and a pinion 17 which is rotationally driven by the electric motor 16 via a speed reducer (not shown) is connected to the pinion 17. The rack is engaged. When opening and closing the door 7, the actuator 1
4, the electric motor 16 is rotated in a predetermined direction while the blocking arm 15 is retracted from the moving space of the door 7 as shown in FIG. On the other hand, in a state where the opening 5 is closed by the door 7 and steam for sterilization is sent into the inner can 2, the blocking arm 15 is moved by the actuator 14 as shown in FIG. It is made to enter the moving space of the door 7 to prevent the door 7 from accidentally moving in the opening direction.

In the case of the pressure vessel door apparatus of the present invention configured as described above, the door 7 is moved along the upper guide rail 11 so that an object to be sterilized can be taken in and out of the sterilization vessel 1.
When the door 7 is moved in the opening direction from the state shown in FIG. 2 to the state shown in FIG. 3, the door 7 is located on the side (the right side in FIGS. 1 to 3).
While moving backward (upward in FIGS. 2 and 3). Therefore, even when the opening 5 of the sterilization container 1 is fully opened, the other end of the door 7 in the horizontal direction (the right end in FIGS. 1 to 3) is located on the side of the sterilization container 1 (see FIGS. The amount L (FIG. 3) projecting to the right) may be smaller than the width W (FIG. 2) of the door 7 (L <W). Therefore, the space required to move the door 7 to open and close the opening 5 can be reduced.

Further, the rear surface of the door 7 is not exposed to the operator side, that is, the space side in front of the pressure vessel 1 (below the FIGS. 2 and 3) even when the opening 5 is opened. Therefore, even if the temperature of the rear surface of the door 7 is increased due to the supply of the steam for sterilization into the inner can 2, the operator will not touch the rear surface and cause burns. Since the front surface of the door 7 is covered with a heat insulating material and a cover (not shown), even if an operator touches the front surface of the door 7, no burn is caused.

Further, the partially cylindrical door 7 has a higher pressure resistance than the conventional flat door. For this reason, the weight of the door 7 can be reduced by reducing the thickness of the door, the number of reinforcing members, and the like, which are required to secure the required pressure resistance. That is, in the case of a steam sterilizer, since the pressure in the inner can 2 reaches about ² to 3 kg / cm ² , the door 7 which receives this pressure in a wide area needs to have a large withstand pressure. As is well known, the arc-shaped plate material has a higher pressure resistance than the flat plate material, so that the above-described effect can be obtained.

Although the above embodiment has been described with respect to the structure in which the door 7 moves horizontally when opening and closing the opening 5, the opening of the sterilization container is moved while moving the door up and down. Can be opened and closed. In this case, the convex curved surface on the front surface of the front plate and the central axis of the partial cylinder of the door exist in the horizontal direction.
Even in this case, devices such as a pipe and a vacuum pump can be installed on the upper surface of the pressure vessel.

[0018]

As described above, the door apparatus for a pressure vessel of the present invention can be installed in a relatively small space, and can realize a structure in which the rear surface of the door does not face an operator.
The degree of freedom of installation and the work safety can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of the present invention.

FIG. 2 is a plan view showing the same in a closed state.

FIG. 3 is a plan view showing the same open state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sterilization container 2 Inner can 3 Outer can 4 Heating jacket 5 Opening 6 Front plate 7 Door 8 Fixed side locking member 9 Locking projection 10 Moving side locking member 11 Upper guide rail 12 Hanging roller 13 Stopper 14 Actuator 15 Stop arm 16 Electric motor 17 Pinion 18 Lower guide rail

Claims (1)

[Claims] 1. A door apparatus for a pressure vessel, comprising: a pressure vessel having an opening, the inside of which has a negative pressure or a positive pressure when in use; and a door which hermetically closes the opening of the pressure vessel. ,
The front surface of the pressure vessel surrounding the opening is a convex curved surface located on a single cylindrical surface, and the door is formed in a partial cylindrical shape having a shape along the front surface of the pressure vessel, At the one end in the circumferential direction of the convex curved surface constituting the front surface of the front surface, the opening side is open, and in the state where the opening is closed by the door, one end in the circumferential direction of the partial cylindrical shape of the door is engaged. A fixed-side locking member that prevents one end of the door from being displaced in a direction away from the front surface is fixed, and the other end in the circumferential direction of the convex curved surface constituting the front surface is provided with the pressure vessel. A locking projection protruding in the circumferential direction of the single cylindrical surface from the outer surface is fixed, and the other end of the partial cylindrical shape of the door in the circumferential direction is closed with the door by the door. To prevent the other end of the door from being displaced away from the front surface. The movable side locking member is fixed, and the door opens and closes the opening by moving along an arc-shaped guide rail having the same center as the door and the front surface. apparatus.