Pressurizing chamber

Abstract

To provide a pressurizing chamber which does not require high manufacturing accuracy and facilitates the expansion of an indoor space in spite of simple assembly.SOLUTION: The pressurizing chamber has a first shell structure side 2a, a second shell structure side 2b, and a joining portion 1, and the first shell structure side 2a and the second shell structure side 2b are joined together via the joining portion 1 to define an interior side 101a of the pressurizing chamber. The joining portion 1 includes an expansion portion 10 having a capability of expanding its outer shape by inflow of the pressurized air A, and an accommodation portion 20 accommodating the expansion portion 10 and restricting the expansion of the expansion portion 10, and when the pressurized air A flows into the expansion portion 10, the expansion portion 10 presses the accommodation portion 20, so that the first shell structure 2a and the second shell structure 2b are hermetically joined via the joining portion 1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pressurized chamber capable of increasing the pressure inside the chamber to a pressure higher than the pressure outside the chamber. [Background technology]

[0002] In a prefabricated pressurized chamber, the air pressure inside the chamber needs to be set higher than the air pressure outside the chamber, and so there has been a concern that the air inside the chamber may leak to the outside through the connecting parts. In light of this situation, various connecting parts that do not leak the air inside the chamber to the outside have been proposed.

[0003] In the connection structure proposed in Patent Document 1, the front and rear sections are joined by inserting screws into the front joint screw holes of the front joint section and the rear joint screw holes of the rear joint section. Specifically, the assembly worker enters the housing section with the packing overlapping the front joint screw holes and the rear joint screw holes. Then, screws are inserted into the front joint screw holes and the rear joint screw holes. Since there are multiple front joint screw holes and multiple rear joint screw holes, screws are inserted into all of the front joint screw holes and the rear joint screw holes when joining the front and rear sections.

[0004] Patent Document 2 proposes a leak prevention device and its fitting structure for preventing air leakage in a high-pressure, high-concentration oxygen capsule, which provides numerous benefits, such as physical and mental relaxation, fatigue recovery, weight loss, and beauty benefits, by relaxing in a capsule space with increased oxygen concentration and air pressure. Specifically, the leak prevention device is composed of a tube body formed into an oval or elliptical ring shape that can be expanded by injecting air. The fitting structure is designed so that the air leakage prevention device is inserted into a groove in a recess in a fitting portion of a concave-convex structure between the opening of the upper cover and the opening of the lower body of the high-pressure, high-concentration oxygen capsule, and the convex portion presses the air leakage prevention device to seal the gap in the fitting portion of the concave-convex structure. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-84202 [Patent Document 2] Utility Model Registration No. 3121656 Summary of the Invention [Problem to be solved by the invention]

[0006] However, since the joint structure proposed in Patent Document 1 joins the front and rear sections via a packing secured with screws, the connection between the front and rear sections requires extremely high manufacturing precision to prevent gaps. Similarly, extremely high installation precision is also required for installation. Furthermore, when the packing deteriorates, air leaks from the deteriorated packing. When constructing a pressurized chamber using the joint structure proposed in Patent Document 2, there is a problem in that the chamber cannot be made larger.

[0007] The present invention has been made in response to these problems, and aims to provide a pressurized chamber that does not require high manufacturing precision, is simple to assemble, and yet allows for easy expansion of the interior space. [Means for solving the problem]

[0008] The invention for solving the above problem is a pressurized chamber comprising a plurality of shell structures and a joint that joins the shell structures together, the joint having an expansion section that has the ability to expand its outer shape when pressurized air flows into it, and a storage section that houses the expansion section and restricts the expansion of the expansion section, and is characterized in that when pressurized air flows into the expansion section, the expansion section presses against the storage section, and the shell structures are airtightly joined together via the joint.

[0009] With this configuration, when pressurized air flows into the expansion section, the expansion section attempts to expand its outer shape. However, the expansion of the expansion section is restricted by the housing section, and the expansion section presses against the housing section. This results in the expansion section and the housing section being joined together in an airtight state, preventing the pressurized air from leaking into the external space.

[0010] Preferably, the housing portion has a shell joint portion that is airtightly joined to the shell structure, and a clamping portion that clamps the expansion portion, and the shell joint portion and the clamping portion are detachably joined.

[0011] According to this configuration, the shell structure and the clamping portion can be joined in a separable manner, which makes it easy to assemble and disassemble the pressurizing chamber.

[0012] Preferably, the shell joint is provided with a protrusion, the protrusion being fitted into a recess defined by the clamping portion and the extension portion.

[0013] According to this configuration, the shell joint portion is provided with a protrusion, and the protrusion is fitted into a recess defined by the clamping portion and the expansion portion, making it easy to position the shell structure and the clamping portion.

[0014] Preferably, the extension and the protrusion are in surface contact with each other.

[0015] According to this configuration, the extension portion and the protrusion portion are in surface contact with each other, so that when the pressurizing chamber is assembled, the shell structures are joined together in an airtight state via the joint portion.

[0016] Preferably, the housing portion has a first housing member airtightly joined to one shell structure and a second housing member airtightly joined to the other shell structure, the first housing member houses the expansion portion, the second housing member is in surface contact with the expansion portion, and the first housing member and the second housing member are detachably joined.

[0017] According to this configuration, the storage section has a first storage member that is airtightly joined to one shell structure and a second storage member that is airtightly joined to the other shell structure, the first storage member stores the expansion section, the second storage member is in surface contact with the expansion section, and the first storage member and the second storage member are detachably joined, thereby reducing the number of constituent parts.

[0018] Preferably, the second housing member is fitted into the first housing member.

[0019] According to this configuration, the second housing member is fitted into the first housing member, so that the shell structures can be firmly joined together and positioning during assembly is easy.

[0020] Preferably, the storage section defines an inlet hole 31 for introducing pressurized air into the expansion section, and the expansion section defines a storage space for storing the introduced pressurized air, and when the pressurized air flows into the storage space, the expansion section expands and presses against the storage section.

[0021] According to this configuration, the storage section defines an inlet hole for introducing pressurized air into the expansion section, the expansion section defines a storage space for storing the introduced pressurized air, and when the pressurized air flows into the storage space, the expansion section expands and presses against the storage section, so that even if a small gap occurs between the expansion section and the storage section, the gap is closed by the pressurized air flowing into the storage space. This allows for larger allowable manufacturing errors during manufacturing and assembly compared to existing connection structures.

[0022] Preferably, the shell structure is provided with a reinforcing rib extending in a direction perpendicular to the direction in which the shell joint portion extends, and the housing portion and the reinforcing rib are joined together.

[0023] According to this configuration, the shell structure is fitted with reinforcing ribs that extend in a direction perpendicular to the direction in which the shell joint extends, and the accommodating portion and the reinforcing ribs are joined, thereby suppressing deformation of the accommodating portion when the pressure chamber is pressurized. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic perspective view of a first embodiment. [Figure 2] 1(a) is a partial cross-sectional side view of the joint, and FIG. 1(b) is a partial cross-sectional plan view. [Figure 3] FIG. 10 is a partial cross-sectional view of a joint in a second embodiment. [Figure 4] FIG. 10 is a partial cross-sectional view of a modified example of the joint portion of the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0025] A first embodiment of the pressurized chamber 100 of the present invention will be described in detail below with reference to Figures 1 and 2. The pressurized chamber 100 is a housing that can create an internal air pressure higher than the external air pressure.

[0026] As shown in FIG. 1 , the pressurizing chamber 100 includes a first shell structure 2a, a second shell structure 2b, and a joint 1. The first shell structure 2a and the second shell structure 2b are joined via the joint 1 to define the interior of the pressurizing chamber 100. In other words, the pressurizing chamber 100 of the shell structure 2 is configured to be easily assembled and disassembled. The pressurizing chamber 100 is preferably made of a durable and strong material. Examples include, but are not limited to, steel and aluminum. In this embodiment, the shell structure 2 includes two shell structures, a first shell structure 2a and a second shell structure 2b, but the present invention is not limited to this. The pressurizing chamber 100 may include three or more shell structures.

[0027] The first shell structure 2a has a structure in which one end of a first tubular portion 71, which is a shell structure of a substantially rectangular cylinder, is closed by a first closed side wall 81. An inward-opening door 110 is attached to the first closed side wall 81. The size of the door 110 needs to be at least large enough to allow users to enter and exit, but it is preferable to make it as large as possible. For example, it is preferable to ensure that the door 110 is large enough to allow furniture such as a bed to be brought in after the pressurized chamber 100 is assembled. Furthermore, the type of door 110 is not limited to an inward-opening type, and it may also be an outward-opening door, a sliding door, a double door, or a folding door.

[0028] The first cylindrical portion 71 has a cylindrical shell structure with arc-shaped corners in a cross-sectional view, and reinforcing ribs LS are joined at predetermined intervals. The reinforcing ribs LS are plate-like members extending in a direction perpendicular to the joint 1.

[0029] The second shell structure 2b has a structure in which one end of a second cylindrical portion 72, which is a shell structure of a substantially rectangular cylindrical shape, is closed by a second closed side wall 82. In this embodiment, the door 110 is attached to the first shell structure 2a, but is not limited to this and may be attached to the first cylindrical portion 71, the second cylindrical portion 72, or the second closed side wall 82.

[0030] The second shell structure 2b has almost the same structure as the first shell structure 2a, except for whether or not a door is attached, and therefore a detailed description thereof will be omitted.

[0031] A pressurizing device (not shown) is connected to the pressurizing chamber 100. The pressurizing device is a device that can raise the air pressure in the room 101a to be higher than the air pressure in the external space by taking in air from the outside 101b into the room 101a. The pressurizing device may also take in outside air via an oxygen supply device, which makes it possible to use it as an oxygen room. The outside air may also be taken in via a radioactivity removal filter, which makes it possible to use it as a nuclear shelter.

[0032] 2(a) and 2(b), the joint 1 has a shell joint member 50, an expansion section 10, and a clamping member 40 that clamps the expansion section 10. The shell joint member 50 and the clamping member 40 cooperate to define a housing section 20 that houses the expansion section 10. The shell joint member 50 is composed of a first shell joint member 51 and a second shell joint member 52.

[0033] The first shell joint member 51 is airtightly joined to the first shell structure 2a. Similarly, the second shell joint member 52 is airtightly joined to the second shell structure 2b. The first shell joint member 51 and the second shell joint member 52 are disposed opposite each other with the expansion section 10 interposed therebetween.

[0034] The first shell joining member 51 is an annular plate-like member having a first protruding portion 51p at the center of a first opposing surface 51s. The second shell joining member 52 is an annular plate-like member having a second protruding portion 52p at the center of a second opposing surface 52s. The first opposing surface 51s and the second opposing surface 52s face each other with the extension portion 10 interposed therebetween.

[0035] The clamping member 40 is composed of an indoor clamping member 41a located on the indoor side 101a and an outdoor clamping member 41b located on the outdoor side 101b. The expansion section 10 is clamped by the indoor clamping member 41a and the outdoor clamping member 41b in an airtightly joined state. In addition, the expansion section 10 is located in the center of the internal regions of the indoor clamping member 41a and the outdoor clamping member 41b in a plan view. In other words, the ends of the indoor clamping member 41a and the outdoor clamping member 41b protrude from the end of the expansion section 10. As a result, the expansion section 10, the indoor clamping member 41a, and the outdoor clamping member 41b cooperate to define a first recess 61 and a second recess 62, respectively.

[0036] The indoor clamping member 41a is a U-shaped annular member in cross section, and is composed of an indoor connecting portion 45a that is airtightly joined to the surface of the expansion portion 10 facing the indoor room 101a, and indoor protruding portions 46a that bend vertically from both ends of the indoor connecting portion 45a and extend toward the indoor room 101a. Also, introduction holes 31 are defined at predetermined intervals around the circumference. The introduction holes 31 are for introducing pressurized air A into a storage space 32 defined in the expansion portion 10.

[0037] The outdoor clamping member 41b is a C-shaped annular member in cross section, and is composed of an outdoor connection portion 45b that is airtightly joined to the outdoor 101b side surface of the expansion portion 10, and an outdoor protrusion portion 46b that bends vertically from both ends of the outdoor connection portion 45b and extends toward the outdoor 101b.

[0038] The extension section 10 is a ring-shaped member with a roughly rectangular outer shape that defines a storage space 32 therein, and is connected to the room 101a via the introduction hole 31. The surface facing the room 101a is joined to the room clamping member 41a, and the surface facing the room 101b is joined to the room clamping member 41b. In addition, the side surface is in partial or complete contact with a first protruding portion 51p attached to the first shell joint member 51 and a second protruding portion 52p attached to the second shell joint member 52.

[0039] The ends of the first shell joint member 51 and the second shell joint member 52 on the indoor 101a side are fixed to the indoor protruding portion 46a at a predetermined interval by bolts B. At the same time, the ends of the outdoor connection portion 45b, the first shell joint member 51, and the second shell joint member 52 on the outdoor 101b side are fixed to the outdoor protruding portion 46b at a predetermined interval by bolts B. As a result, the expansion section 10 housed in the housing section 20 is restrained by the housing section 20, and as a result, the expansion of the expansion section 10 is restrained.

[0040] The expansion part 10 is preferably made of a material that has a predetermined elasticity, is difficult for air to pass through, and is highly durable. In this embodiment, rubber is used as an example, but the material is not limited to this.

[0041] The operation of the joint 1 when the interior of the room 101a is pressurized will be described.

[0042] When the indoor space 101a is pressurized, pressurized air A flows into the storage space 32 defined in the expansion section 10 via the inlet holes 31 defined at predetermined intervals in the indoor clamping member 41a. The expanding section 10 tries to expand the storage space 32 due to the inflow of pressurized air A. However, the expansion of the expansion section 10 is restricted by the accommodating section 20, and the expansion section 10 presses against the first protrusion 51p, the second protrusion 52p, and the clamping member 40. Even if a minute gap occurs between the first protrusion 51p, the second protrusion 52p, and the expansion section 10, the expansion section 10 presses against the protrusions, closing the gap. This prevents the pressurized air A from leaking to the outside of the room 101b. In this case, even if there is a small gap between the first shell joint member 51 and the second shell joint member 52, which are joined by bolts B, and the indoor protrusion 46a and the outdoor connection portion 45b, the pressurized air A will not leak to the outside 101b. Furthermore, the first shell joint portion 51 or the second shell joint portion 52 will tend to displace in the direction of expansion as the expansion portion 10 expands, but this displacement is restrained by the reinforcing rib LS.

[0043] If a gap then appears between the outer surface of the expansion section 10 and the inner surface of the storage section 20 for some reason, and the pressurized air A tries to leak out to the outside 101b, the pressurized air A leaking through the gap will flow faster, causing a drop in air pressure. The difference in air pressure between the gap and the outside 101b will pull the expansion section 10 toward the outside 101b, and the gap will naturally close.

[0044] The second embodiment will be described in detail with reference to Fig. 3. Since the first and second embodiments have much in common, a description of the common parts will be omitted in principle, and differences will be mainly described in detail. Furthermore, the same components as those in the first embodiment will be assigned the same reference numerals as those in the first embodiment, and components different from those in the first embodiment will be assigned reference numerals in the 200s.

[0045] The first housing member 221 is airtightly joined to the first shell structure 202a. Similarly, the second housing member 222 is airtightly joined to the second shell structure 202b. The first housing member 221 and the second housing member 222 are disposed opposite each other with the expansion section 10 interposed therebetween.

[0046] The first housing member 221 is an annular member that houses the expansion section 10, and has joining ends 225 at both ends for joining to the second housing member 222 with bolts B. On the side of the room 101a, introduction holes 231 for introducing pressurized air A into the expansion section 10 are provided at predetermined intervals. The first housing member 221 is open toward the second housing member 222, and by having its open end protrude from the edge of the expansion section 10, the first housing member 221 and the expansion section 10 cooperate to define a first housing recess 261.

[0047] The second accommodating member 222 is an annular plate-like member, and has a second protruding portion 252p provided in the center. The second protruding portion 252p is detachably fitted into the first accommodating recess 261. In addition, in the fitted state, the expansion portion 10 and the second protruding portion 252p are in surface contact with each other.

[0048] The operation of the joint when the interior of the room is pressurized is almost the same as in the first embodiment, so a description thereof will be omitted.

[0049] This embodiment is merely an example, and it goes without saying that modifications can be made without departing from the technical spirit of the present invention. For example, as shown in a modified example in Fig. 4, the first housing member 321 and the second housing member 322 may be joined by a bolt B along the extension direction of the shell structure 302, which is made up of the first shell structure 302a and the second shell structure 302b. [Industrial Applicability]

[0050] The pressurized chamber according to the present invention can be used as a nuclear shelter or an oxygen room under certain conditions. Because it can be used for such a variety of purposes, it has great industrial applicability. [Explanation of symbols]

[0051] 1: Joint 2a: First shell structure (shell structure) 2b: Second shell structure (shell structure) 10: Extension 20: Storage section 31, 231: Inlet holes 32: Storage space 50: Shell joint member (shell joint) 61: First recess (recess) 62: Second recess (recess) 100: Pressurized chamber 221: First storage member 222: Second storage member A: Pressurized air LS: Reinforcement rib

Claims

1. a plurality of shell structures; a joint portion that joins the shell structures together, The joint includes an expansion portion having a function of expanding its outer shape when pressurized air flows in; a housing portion that houses the expansion portion and restricts the expansion of the expansion portion, A pressurized chamber characterized in that when pressurized air flows into the expansion section, the expansion section presses against the storage section, thereby airtightly joining the shell structures together via the joint section.

2. The pressurizing chamber according to claim 1, characterized in that the accommodation portion has a shell joint portion that is airtightly joined to the shell structure and a clamping portion that clamps the expansion portion, and the shell joint portion and the clamping portion are detachably joined.

3. 3. The pressurizing chamber according to claim 2, wherein the shell joint portion is provided with a protrusion, and the protrusion is fitted into a recess defined by the clamping portion and the expansion portion.

4. The pressurizing chamber according to claim 3 , wherein the extension and the protrusion are in surface contact with each other.

5. The pressurized chamber according to claim 1, characterized in that the accommodation portion has a first accommodation member airtightly joined to one shell structure and a second accommodation member airtightly joined to the other shell structure, the first accommodation member accommodating the expansion portion, the second accommodation member being in surface contact with the expansion portion, and the first accommodation member and the second accommodation member being detachably joined.

6. The pressurizing chamber according to claim 5 , wherein the second housing member is fitted into the first housing member.

7. The pressurization chamber according to claim 1, characterized in that the accommodation section defines an inlet hole for introducing pressurized air into the expansion section, the expansion section defines a storage space for storing the introduced pressurized air, and when pressurized air flows into the storage space, the expansion section expands and presses against the accommodation section.

8. The pressurizing chamber according to claim 1, wherein the shell structure is provided with a reinforcing rib extending in a direction perpendicular to the direction in which the joint extends, and the accommodating portion and the reinforcing rib are joined together.

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