JPS6159416B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a closed container used in a reactor of a desulfurization tower, a methanol reactor, a CO--H ₂ denaturation device, etc., and particularly relates to a sealing structure of the closed container.

[Conventional technology]

As shown in FIG. 1, the schematic structure of the airtight container includes a container body 7 and a lid 1 that closes the opening of the container body 7.
and a gasket 3, and the flange 5 of the container body 7 and the peripheral part of the lid 1 are tightened with bolts 2.

FIG. 4 shows a seal structure in a conventional closed container. An annular recess 8 for accommodating the gasket 3 is provided around the inner surface of the lid 1, and the gasket 3 is inserted into the recess 8.
is supported by a gasket holder 6 fixed to the inner surface of the lid 1. The lid 1, the gasket 3 and the container body 7 are made of a relatively hard material such as stainless steel, and the container body 7 of the gasket 3 is made of a relatively hard material such as stainless steel.
Soft sheets 4, 4 made of a relatively soft material such as aluminum, for example, are disposed on the seal pressure contact surfaces 9, 9 facing the lid 1. Both the gasket 3 and the soft sheet 4 have a ring-like overall shape, and the gasket 3 has a predetermined thickness and a substantially trapezoidal cross-sectional shape.

By tightening the bolt 2, the lid 1 is attached to the container body 7.
This pressing force presses the soft sheet 4 between the lid 1 and the gasket 3, and the pressing force also presses the lower soft sheet 4 to the container body 7 side via the gasket 3. do. Due to its flexibility, the soft sheet 4 conforms well to the sealing surfaces of the lid 1, gasket 3, and container body 7, and is formed on the contact surfaces between the lid 1 and the gasket 3 and the contact surfaces between the gasket 3 and the container body 7. It is useful for filling minute gaps air-tightly or liquid-tightly. On the other hand, the gasket 3 uses the tightening force of the bolt 2 to attach the soft sheet 4 to the lid 1.
The gasket 3 and the soft sheet 4 cooperated with each other to maintain a good initial seal.

Note that examples of this type of closed container include those disclosed in Japanese Patent Publication No. 46-35801.

[Problem that the invention seeks to solve]

By the way, the above-mentioned soft sheet 4 has a ring shape, but it is thin and has low mechanical strength, so when the internal pressure of the closed container increases, the soft sheet 4
The container may be completely stretched or partially torn and pushed outward as shown by the arrow, thereby causing the air-liquid tightness of the closed container to be lost.

In order to prevent the movement of the soft sheet 4, the inventor previously studied a closed container as shown in FIG. In the case of this airtight container, the container body 7 and the lid 1
A sawtooth-shaped hook portion 10 is carved on the surface facing the soft sheet 4 . Therefore, the locking portion 10 bites into the soft sheet 4 due to the tightening force of the bolt 2, and the soft sheet 4 is prevented from being pushed outward even if the internal pressure becomes high.

By the way, in order to maintain the air-liquid tightness of a closed container for a long period of time, it is necessary to periodically replace the soft sheet 4. However, in the structure shown in FIG. Since it is provided on the side, when replacing the soft sheet 4 that has bitten into the hook 10, it is necessary to completely peel off the soft sheet 4, which is extremely troublesome. In particular, since the hooking part 10 of the lid 1 is provided on the inner wall of the recess 8, it is difficult to peel off the soft sheet 4, and a part of the soft sheet 4 remains on the lid 1 and the container body 5. When the soft sheet 4 is set, uniform sealing cannot be achieved and air-liquid tightness is impaired. Also, the hook part 1 on the lid 1 side
0 is provided on the inner wall of the recess 8, so that the hook 10
It is difficult to engrave.

Furthermore, the soft sheet 4 interposed between the gasket 3 and the flange 5 may be displaced in the radial direction before the bolt 2 is tightened, and in that case, the position of the soft sheet 4 needs to be adjusted so that it is concentric with the gasket 3. Therefore, the tightening work is complicated.

An object of the present invention is to eliminate such drawbacks, to provide a sealed container that can maintain desired sealing characteristics indefinitely and is easy to work with.

[Means for solving problems]

In order to achieve this object, the present invention forms a hook part on the seal pressure contact surface of the gasket to prevent the soft sheet from moving in a direction perpendicular to the pressure bonding direction of the gasket. It is characterized by having a flat surface.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG.

The lid 1 is fixed to the flange 5 of the container body 7 with bolts 2 as in the conventional case.
A recess 8 is provided around the inner surface of the lid 1.
A gasket 3 is inserted into the recess 8, and soft sheets 4, 4 made of soft metal, synthetic resin, etc. are disposed on the seal pressure contact surfaces 9, 9 of the gasket 3, which face the lid 1 and the container body 7, respectively. There is. Serrated hooks 10, 10 are formed on the seal pressure contact surfaces 9, 9 of the gasket 3, and when the bolt 2 is tightened, the hooks 10 bite into the soft sheet 4, and the soft sheet 4 is held in place. It is fixed in place. Also, the soft sheet 4 on the side that is crimped to the flange 5
The inner end 11 of the gasket 3 is bent along the lower end surface of the gasket 3 and the gasket retainer 6 is bent.
is held between. On the other hand, the soft sheet 4 on the side that is pressed onto the lid 1 is held between the lid 1 and the gasket 3 by the force applied when the gasket 3 is supported on the lid 1 by the gasket presser 6. Therefore, when the lid 1 is fastened to the container body 7, since the soft sheet 4 is fixed, the soft sheet 4 does not shift, and the tightening operation is easy.

On the other hand, the soft sheet 4 of the lid 1 and the container body 7
The surface facing the is a flat surface as shown in the drawing.

[Effects of the Invention] The present invention has the above-mentioned structure, and when the hook part becomes loose or corroded, the desired high sealing effect can be maintained forever by replacing only the gasket. can do. Further, since the hooking portion is formed on the outer circumferential surface of the gasket, it is easy to carve the hooking portion and precise machining is possible.
Furthermore, since the surfaces of the container body and the lid facing the soft sheet are flat surfaces, there is an advantage that the work of peeling off the soft sheet when replacing the soft sheet is easy.

Furthermore, as described in the embodiment, the inner end of the soft sheet interposed between the gasket and the container body is bent along the lower end surface of the gasket, and the bent inner end is placed between the gasket and the gasket holder. A structure in which the soft sheet is sandwiched between the two is extremely effective in preventing the soft sheet from being pushed outward. That is, if the soft sheet is in a substantially flat state as shown in FIG. 4, the soft sheet is likely to be pushed outward by internal pressure. However, as mentioned above, if the inner end of the soft sheet is bent along the lower surface of the gasket, or is bent and fixed by clamping, it is very difficult to push out the soft sheet due to the internal pressure. The positional stability of the soft sheet is good.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a sealed container, FIG. 2 is an enlarged cross-sectional view of the main part showing the seal structure of the sealed container previously studied by the present inventor, and FIG. 3 is a seal of a sealed container according to an embodiment of the present invention. FIG. 4 is an enlarged sectional view of the main part showing the structure of a conventional airtight container. 1... Lid, 3... Gasket, 4... Soft sheet, 6... Gasket holder, 7... Container body, 9
... Seal pressure contact surface, 10 ... Latching portion, 11 ... Inner end.

Claims (1)

[Scope of Claims] 1. A container body, a lid that closes the opening of the container body and whose periphery is pressed toward the opening periphery of the container body, and a lid that faces the opening periphery of the container body and the lid. a ring-shaped gasket, each having a seal pressure contact surface, and a ring-shaped soft sheet disposed on the seal pressure contact surface side of the gasket and softer than the container body, the lid, and the gasket;
In an airtight container in which a gasket presses a soft sheet onto the container body and the lid using the pressing force of the lid against the container body, the soft sheet is prevented from moving in a direction perpendicular to the direction in which the gasket is pressed against the seal pressure contact surface of the gasket. 1. A closed container, characterized in that a hook is formed and the surface facing the container body and the soft sheet of the lid is a flat surface. 2. The airtight container according to claim 1, wherein the hook portion is formed in a sawtooth shape. 3. The airtight container according to claim 1, wherein an inner end of the soft sheet interposed between the gasket and the container body is bent along the lower end surface of the gasket. 4. The airtight container according to claim 3, wherein the inner end of the flexible sheet is held between a gasket and a gasket holder.