JP5750405B2 - Pressure vessel - Google Patents

Description

  The present invention relates to a pressure vessel used for a compressor gas cooler or the like.

  Conventionally, what is equipped with the partition which divides the inside into two chambers as a pressure vessel in which a high voltage | pressure gas is accommodated is known. For example, Patent Document 1 includes a container body that stores high-pressure gas, and a partition wall that is formed in the container body so as to divide the container body into a first chamber and a second chamber. A pressure vessel is disclosed. The container body has a shape that is long in one direction. The partition wall has a flat plate shape extending in a direction parallel to the longitudinal direction of the container body, and is connected to the upper and lower parts of the container body.

  When high-pressure gas is stored in each chamber of the container body, each part of the container body surrounds each chamber, i.e., the upper, lower, and side portions of the container body tend to expand outward. A load to be applied is applied. And since the said partition is connected to the upper part and the lower part of the said container main body, it is the up-down direction (each of the said longitudinal direction and the thickness direction of the said partition) by the upper part and lower part of the container main body which are going to expand | swell outside. (Direction orthogonal to the direction). As a result, the tensile load in the vertical direction acts on the partition wall. In addition, since equal pressure is applied to the partition from both chambers adjacent in the thickness direction, even when a high-pressure gas is accommodated in each chamber, the bending moment hardly acts on the partition. .

  Further, the pressure vessel is required to have a pressure breakdown strength of a predetermined value or more as a main strength design requirement.

Japanese Patent Laying-Open No. 2005-155776

  In general, as a pressure vessel, there is a need to reduce the weight as much as possible while satisfying the required design requirements. However, in the pressure vessel as described in Patent Document 1, it is difficult to reduce the weight of the pressure vessel because the partition wall needs to have a sufficiently large thickness to withstand the tensile load. there were.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a pressure vessel that can be reduced in weight while satisfying the required design requirements.

  In order to solve the above problems, the present inventors have found that the distribution of the tensile load generated by the internal pressure of the high-pressure gas stored in the container main body is uneven in the partition wall of the pressure container. Focused on. That is, attention was paid to the fact that there are portions where only a relatively small tensile load acts on the partition wall having a constant thickness, and these portions have an excessively reinforced structure. Therefore, by reducing the excessively reinforced portion of the partition so as to eliminate the uneven distribution of the tensile load generated in the partition, the material is reduced and the entire pressure vessel is reduced in weight. I came up with the idea that I could do it.

  The present invention has been made from such a viewpoint, and is formed in the container main body so as to divide the container main body into the first chamber and the second chamber into two equal parts. A pressure vessel having a partition wall, wherein the container body includes an upper wall connected to an upper end of the partition wall, a bottom wall facing the upper wall and connected to a lower end of the partition wall, and the upper wall. A peripheral wall connecting the peripheral edge of the wall and the peripheral edge of the bottom wall, the partition wall having a long shape in one direction, and the thickness of the first wall located in a region including the center in the longitudinal direction of the partition wall A pressure vessel is provided in which the thickness of the second wall located on one end side in the longitudinal direction and the thickness of the third wall located on the other end side in the longitudinal direction are smaller.

  In the pressure vessel according to the present invention, since the wall thickness of the partition where only a relatively small tensile load acts is reduced, the pressure vessel as a whole satisfies the required design requirements and reduces the material. Weight reduction can be achieved. Specifically, in the pressure vessel of the present invention, compared to the first wall located in the region including the center in the longitudinal direction of the partition wall, the portion of the partition wall closer to the peripheral wall, that is, the partition wall Only a small tensile load acts on the second wall located on one end side in the longitudinal direction and the third wall located on the other end side. Therefore, the thickness of each of the second wall and the third wall can be made smaller than the thickness of the first wall within a range that satisfies the design requirements required for the pressure vessel. Thereby, material is reduced and a pressure vessel is reduced in weight.

  In this case, the peripheral wall has a shape extending in a direction parallel to the longitudinal direction of the partition wall, and has a partition facing portion facing the partition wall, and the dimension of the second wall in the longitudinal direction is the partition wall. And the dimension of the third wall in the longitudinal direction is less than or equal to one half of the dimension between the partition and the partition facing part. Preferably there is.

  According to this configuration, the second wall and the first wall are satisfied while satisfying the design requirements by sufficiently securing the longitudinal dimension of the first wall on which the relatively large tensile load acts among the partition walls. By reducing the thickness of each of the three walls to be smaller than the thickness of the first wall, the pressure vessel can be reduced in weight.

  In the present invention, the surface of the first wall and the surface of the second wall are smoothly connected, and the surface of the first wall and the surface of the third wall are preferably connected smoothly. .

  In this way, stress concentration occurring near the boundary between the first wall and the second wall and near the boundary between the first wall and the third wall can be alleviated.

  In the present invention, when the high-pressure gas is accommodated in the container body, a tensile load in a short direction perpendicular to the longitudinal direction and the thickness direction of the partition wall acts on the first wall. Accordingly, the thickness of the first wall is set so that the stress generated in the first wall is uniformly distributed in the first wall, and when the high-pressure gas is stored in the container body, the first wall The thickness of the second wall is set so that the stress generated in the second wall when the tensile load in the short direction acts on the two walls is uniformly distributed in the second wall. When the high-pressure gas is contained in the third wall, a stress generated in the third wall due to the tensile load acting in the short direction on the third wall is uniformly distributed in the third wall. It is preferable that the thickness of the three walls is set.

  In this way, the thickness of each wall changes to correspond to the distribution of tensile load acting on each of the first wall, the second wall, and the third wall, i.e., the thickness of each wall. Is optimized, the material is not wasted and the pressure vessel is further reduced in weight.

  In the present invention, the upper wall includes an upper wall main body connected to an upper end of the peripheral wall and an upper end of the partition wall, and an upper wall standing upright on an outer surface of the upper chamber body on the first chamber side. A first chamber side rib, and an upper wall second chamber side rib standing on an outer surface of the upper wall body on the second chamber side, wherein the bottom wall has a lower end of the peripheral wall and a lower end of the partition wall A bottom wall body connected to the bottom wall, a bottom wall first chamber side rib erected on the outer surface of the first chamber side of the bottom wall body, and an outer surface of the bottom wall body on the second chamber side. A bottom wall second chamber side rib that is erected, and the upper wall first chamber side rib and the upper wall second chamber side rib are the thickness of the first wall of the outer surface of the upper wall body. Relative to the height dimension of the part erected in the first region adjacent to the first wall in the direction, the outer surface of the upper wall body was erected in the second region other than the first region The bottom wall first chamber side rib and the bottom wall second chamber side rib are in the thickness direction of the first wall of the outer surface of the bottom wall body. The height dimension of the portion erected in the fourth region other than the third region of the outer surface of the bottom wall body, rather than the height dimension of the portion erected in the third region adjacent to the first wall. It is preferable to have a smaller shape.

  In this way, the portion of the upper wall body where only a relatively small stress is generated, that is, the first wall other than the first region adjacent to the first wall in the thickness direction of the first wall of the upper wall body. By making the height dimension of the ribs erected in the two regions smaller than the height dimension of the ribs erected in the first region where the relatively large stress is generated in the upper wall main body, The strength of the upper wall body can be improved while avoiding an increase in weight. The same applies to the bottom wall side.

  As described above, according to the present invention, it is possible to provide a pressure vessel that can reduce the material weight while satisfying the required design requirements.

It is a perspective view of the pressure vessel of one embodiment of the present invention. It is the perspective view of the state which looked at the pressure vessel of FIG. 1 from a different angle. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. (A) It is sectional drawing in the XY plane of a partition. (B) It is a modification of what is shown to (a). It is the graph which showed the relationship between the length dimension of a 2nd wall, and stress. It is sectional drawing of the example which changed the height dimension of each rib. It is the perspective view of the state which looked at the upper half of the container main body from the downward direction. It is the perspective view of the state which looked at the upper half of the container main body from the downward direction.

  A preferred embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the pressure vessel of the present embodiment includes a substantially rectangular parallelepiped container main body that contains high-pressure gas, and a partition wall 40 that divides the inside of the container main body into a first chamber and a second chamber. Have In the first chamber and the second chamber, a heat exchanger, piping, and the like are accommodated, but these are not shown. The container body includes an upper wall 10 connected to the upper end of the partition wall 40, a bottom wall 20 facing the upper wall 10 and connected to a lower end of the partition wall 40, and a peripheral edge of the upper wall 10 and a peripheral edge of the bottom wall 20. And a peripheral wall 30 for connecting the two. In the following description, the arrangement direction of the top wall 10 and the bottom wall 20 is the Z-axis direction, the arrangement direction of the first chamber and the second chamber is the Y-axis direction, and is orthogonal to the Z-axis direction and the Y-axis direction. The direction to perform is the X-axis direction.

  As shown in FIG. 1, the upper wall 10 includes a flat plate-like upper wall main body 11, an upper wall protruding portion 12 that protrudes outward from the surface of the upper wall main body 11, and an outer surface of the upper wall main body 11. An upper wall first chamber side rib 13a erected on the first chamber side, and an upper wall second chamber side rib 13b erected on the second chamber side of the outer surface of the upper wall body 11. Have.

  The upper wall body 11 has a shape that closes the upper end of the peripheral wall 30, is connected to the upper end of the peripheral wall 30, and is connected to the upper end of the partition wall 40. As shown in FIG. 4, the boundary between the upper wall body 11 and the peripheral wall 30 is a curved surface that protrudes outward. In the present embodiment, the upper wall body 11 has a substantially rectangular shape that is long in one direction (Y-axis direction).

  As shown in FIG. 4, the upper wall protrusion 12 is formed so as to include a portion located on the back side of the connection portion between the inner surface of the upper wall body 11 and the upper end of the partition wall 40 among the outer surfaces of the upper wall body 11. The The upper wall projecting portion 12 has a shape extending substantially along the longitudinal direction of the upper wall main body 11 along the short direction (X-axis direction) of the upper wall main body 11. In the present embodiment, the amount of protrusion from the outer surface of the upper wall main body 11 of the upper wall protrusion 12 is constant over the entire length of the upper wall protrusion 12. The dimension of the upper wall protruding portion 12 in the short direction (Y-axis direction) is set to be larger than the dimension of the connecting portion between the inner surface of the upper wall main body 11 and the upper end of the partition wall 40.

  The upper wall first chamber side rib 13 a reinforces the first chamber side portion of the upper wall main body 11. The upper wall first chamber side rib 13a includes a short direction rib 14a having a shape extending along a direction parallel to the short direction of the upper wall body 11, and a direction parallel to the longitudinal direction of the upper wall body 11, that is, Longitudinal ribs 15a having a shape extending along a direction intersecting the upper wall protruding portion 12 are provided. The short-side ribs 14 a and the long-side ribs 15 a have the same height, and the height is set higher than that of the upper wall protruding portion 12. The longitudinal rib 15 a has a shape connected to the side surface and the upper surface of the upper wall protrusion 12. In the present embodiment, there are three short-side ribs 14a and six long-side ribs 15a. Further, the upper wall first side rib 13 a is not formed at the corner of the upper wall body 11. That is, the length of the short-side rib 14a that is erected on the outermost side is shorter than the length of the rib that is erected on the inner side, and the length of the long-side rib 15a is erected on the outermost side. The length of the thing is shorter than the length of the thing erected immediately inside.

  The upper wall second chamber side rib 13b reinforces the portion of the upper wall main body 11 on the second chamber side. The upper wall second chamber side rib 13b includes a lateral rib 14b having a shape extending along a direction parallel to the lateral direction of the upper wall body 11, and a direction parallel to the longitudinal direction of the upper wall body 11, that is, Longitudinal ribs 15b having a shape extending along a direction intersecting the upper wall protruding portion 12 are provided. The short-side ribs 14b and the long-side ribs 15b have the same height, and the height is set to be higher than that of the upper wall protruding portion 12. The longitudinal rib 15 b has a shape connected to the side surface and the upper surface of the upper wall protrusion 12. Further, the longitudinal ribs 15 a of the upper wall first chamber side rib 13 a and the longitudinal ribs 15 b of the upper wall second chamber side rib 13 b have shapes that are connected to each other on the upper surface of the upper wall protruding portion 12. That is, each of the longitudinal ribs 15 a and 15 b has a shape extending along the longitudinal direction of the upper wall main body 11 so as to straddle the upper side of the upper wall protruding portion 12 while being in contact with the upper wall protruding portion 12. In the present embodiment, three short-side ribs 14b and six long-side ribs 15b are provided. Further, the upper wall second side rib 13 b is not formed at the corner portion of the upper wall main body 11. That is, the length of the short-side rib 14b that is erected on the outermost side is shorter than the length of the rib that is erected on the inner side, and the length of the long-side rib 15b is erected on the outermost side. The length of the thing is shorter than the length of the thing erected immediately inside.

  As shown in FIG. 2, the bottom wall 20 includes a bottom wall main body 21 having the same shape as the upper wall main body 11, a bottom wall protruding portion 22 having a shape protruding outward from the surface of the bottom wall main body 21, and a bottom A bottom wall first chamber side rib 23a standing on the first chamber side of the outer surface of the wall body 21, and a bottom wall second chamber standing on the second chamber side of the outer surface of the upper wall body 11. Side ribs 23b.

  The bottom wall body 21 has a shape that closes the lower end of the peripheral wall 30, is connected to the lower end of the peripheral wall 30, and is connected to the lower end of the partition wall 40. As shown in FIG. 4, the boundary between the bottom wall main body 21 and the peripheral wall 30 is a curved surface that is convex outward.

  As shown in FIG. 4, the bottom wall protrusion 22 is formed so as to include a portion of the outer surface of the bottom wall body 21 that is located on the back side of the connection portion between the inner surface of the bottom wall body 21 and the lower end of the partition wall 40. The The bottom wall protrusion 22 has a shape that extends substantially in the longitudinal center of the bottom wall body 21 along the short direction (X-axis direction) of the bottom wall body 21. In the present embodiment, the amount of protrusion of the bottom wall protrusion 22 from the outer surface of the bottom wall body 21 is constant over the entire length of the bottom wall protrusion 22 in the longitudinal direction. The dimension of the bottom wall protrusion 22 in the short direction (Y-axis direction) is set to be larger than the dimension of the connection portion between the inner surface of the bottom wall body 21 and the lower end of the partition wall 40. Moreover, the site | part connected with the bottom wall protrusion part 22 among the bottom wall main bodies 21 has a shape which protrudes on the outer side (lower side in FIG. 4) other parts of the bottom wall main body 21.

  The bottom wall first chamber side rib 23 a reinforces the first chamber side portion of the bottom wall main body 21. The bottom wall first chamber side rib 23a includes a short direction rib 24a having a shape extending along a direction parallel to the short direction of the bottom wall body 21, and a direction parallel to the longitudinal direction of the bottom wall body 21, that is, Long ribs 25a having a shape extending along the direction intersecting the bottom wall protrusion 22 are provided. The short-side ribs 24 a and the long-side ribs 25 a have the same height, and the height is set lower than the bottom wall protrusion 22. The longitudinal rib 25 a has a shape connected to the side surface of the bottom wall protrusion 22. In the present embodiment, two short-side ribs 24a and four long-side ribs 25a are provided.

  The bottom wall second chamber side rib 23b reinforces the portion of the bottom wall main body 21 on the second chamber side. The bottom wall second chamber side rib 23b includes a short direction rib 24b extending along a direction parallel to the short direction of the bottom wall body 21, and a direction parallel to the longitudinal direction of the bottom wall body 21, that is, Long ribs 25b having a shape extending along a direction intersecting the bottom wall protrusion 22 are provided. The short-side ribs 24 a and the long-side ribs 25 a have the same height, and the height is set lower than the bottom wall protrusion 22. The longitudinal rib 25 b has a shape connected to the side surface of the bottom wall protrusion 22. In the present embodiment, two short-side ribs 24b and four long-side ribs 25b are provided.

  The peripheral wall 30 connects the peripheral edge of the upper wall body 11 and the peripheral edge of the bottom wall body 21. In the present embodiment, the peripheral wall 30 has a substantially rectangular tube shape having a constant thickness over the entire periphery. The partition facing portion 30 a that faces the partition 40 in the peripheral wall 30 has a shape that extends in a direction parallel to the longitudinal direction of the partition 40. The peripheral wall 30 includes a first side wall 31 and a second side wall 32 that are formed at portions that intersect the partition wall 40. The first side wall 31 has a first opening 31a that communicates the first chamber with the outside of the container body, and a second opening 31b that communicates the second chamber with the outside of the container body. Similarly, the 2nd side wall 32 has the 1st opening part 32a which connects the said 1st chamber and the container main body exterior, and the 2nd opening part 32b which connects the said 2nd chamber and the container main body exterior. After housing the heat exchanger, piping, and the like in the first chamber and the second chamber, each opening is closed with a lid that covers the opening. In each figure, illustration of the lid is omitted.

  When high pressure gas is sealed in the pressure vessel, a load in a direction in which each of the walls expands outward acts on the upper wall 10, the bottom wall 20, and the peripheral wall 30. At this time, the partition wall 40 is pulled in the vertical direction (Z-axis direction) connecting the top wall 10 and the bottom wall 20 by the top wall 10 and the bottom wall 20 that expand outward, so that the partition wall 40 includes the above-described partition wall 40. A vertical tensile load acts. This tensile load is not evenly distributed over the entire partition 40. That is, the partition 40 has a portion where a relatively large tensile load acts and a portion where a small tensile load acts. Specifically, the upper wall main body 11 and the bottom wall main body 21 have the largest deformation amount at the central portion, and the deformation amount becomes smaller from the central portion toward the connecting portion with the peripheral wall 30. The tensile load acting on the partition wall 40 is also maximized at the central portion of the partition wall 40 and decreases from the central portion toward both ends of the partition wall 40. The pressure vessel according to the present embodiment is such that the thickness of the partition wall 40 substantially corresponds to the distribution of the tensile load acting on the partition wall 40. That is, basically, the thickness of the portion where the tensile load becomes relatively large is increased and the thickness of the portion where the tensile load becomes relatively small is decreased.

  Specifically, as shown in FIGS. 3 and 4, the partition wall 40 has a direction (Z-axis direction) connecting a connection portion between the upper wall main body 11 and a connection portion between the bottom wall main body 21 and each wall 40. It has a rectangular plate shape that is long in the direction (X-axis direction) orthogonal to the thickness direction (Y-axis direction). 3 is a cross-sectional view taken along the line III-III in FIG. 1. This line III-III is a short line adjacent to the upper wall protrusion 12 and the upper wall protrusion 12 in FIG. It passes between the hand ribs 14b. The partition wall 40 is positioned on the first wall 41 located in a region including the center of the partition wall 40 in the longitudinal direction, the second wall 42 positioned on one end side in the longitudinal direction, and on the other end side in the longitudinal direction. And a third wall 43. Each of these walls is connected in the order of the second wall 42, the first wall 41, and the third wall 43 from one end side in the longitudinal direction to the other end side. In the present embodiment, an example in which the partition wall 40 is a rectangle that is long in one direction when viewed from the Y-axis direction is shown. However, the partition wall 40 may be square when viewed from the same direction. Even in such a case, the X-axis direction will be described as the longitudinal direction of the partition 40.

  The first wall 41, the second wall 42, and the third wall 43 all have a rectangular flat plate shape that is long in one direction (X-axis direction). The first wall 41 has an upper end connected to the upper wall main body 11 and a lower end connected to the bottom wall main body 21. The second wall 42 and the third wall 43 have upper ends connected to the upper wall main body 11, lower ends connected to the bottom wall main body 21, and opposite to the side connected to the first wall 41. The end is connected to the peripheral wall 30. As shown in FIG. 5A, the second wall 42 has a shape whose thickness is smaller than the thickness of the first wall 41, and the third wall 43 has a thickness of the first wall 41. It has a shape smaller than the thickness of the wall 41. In the present embodiment, the first wall 41, the second wall 42, and the third wall 43 have a uniform thickness over the entire area in the longitudinal direction, and the central axes in the respective thickness directions coincide with each other. It is arranged. However, as shown in FIG. 5B, the surface of the first wall 41 and the surface of the second wall 42 are smoothly connected, and the surface of the first wall 41 and the surface of the third wall 43 are smooth. It is preferable that they are connected. In this way, stress concentration occurring near the boundary between the first wall 41 and the second wall 42 and near the boundary between the first wall 41 and the third wall 43 can be alleviated.

  The longitudinal dimension L1 of the second wall 42 and the longitudinal dimension L2 of the third wall 43 are respectively the dimension B between the partition facing part 30a facing the partition 40 of the peripheral wall 30 and the partition 40 (see FIG. 1)) or less. As shown in FIG. 6, the stress generated in the second wall 42 is half of the stress generated in the first wall 41 in the range where the dimension L1 is less than or equal to half of the dimension B. The reason is as follows. Therefore, by setting the dimension L1 to be less than or equal to half of the dimension B, the thickness of the second wall 42 can be set to be less than or equal to half of the thickness of the first wall 41. The same applies to the third wall 43. In the present embodiment, the longitudinal dimension L1 of the second wall 42 and the longitudinal dimension L2 of the third wall 43 are the same.

  Further, the stress generated in the first wall 41 when the high-pressure gas is accommodated in the container body and the tensile load in the vertical direction acts on the first wall 41 is uniformly distributed in the first wall 41. The thickness of the first wall 41 may be set. The same applies to the second wall 42 and the third wall 43. In this way, the thickness of each wall is optimized, the material is not wasted, and the pressure vessel is further reduced in weight.

  Further, when the high pressure gas is sealed in the container main body described so far, the portions that become relatively high stress are the boundary between the upper wall main body 11 and the partition wall facing portion 30a of the peripheral wall 30, and the bottom wall main body 21 and the partition wall. Since it is a boundary with the opposing part 30a, it is preferable that the said container main body further has a reinforcement part which reinforces this boundary vicinity. In this embodiment, since the site | part which becomes high stress is the same on the upper wall 10 side and the bottom wall 20 side, it demonstrates taking the upper wall 10 side as an example. Specifically, as shown in FIGS. 8 and 9, it is preferable to provide upper reinforcing portions 51 and 52. 8 has a shape that bulges inward from the boundary between the inner surface of the partition facing portion 30a and the inner surface of the upper wall main body 11 and extends along the boundary. The upper reinforcing portion 52 shown in FIG. 9 is connected to the inner surface of the partition wall facing portion 30 a and the inner surface of the upper wall body 11 so as to straddle the boundary between the inner surface of the partition wall facing portion 30 a and the inner surface of the upper wall body 11. Have In addition, these upper side reinforcement parts 51 and 52 may be provided in the outer surface instead of the inner surface of the container main body.

  As described above, in the pressure vessel of the present embodiment, the thickness of the portion of the partition wall 40 where only a relatively small tensile load is applied is reduced, so that the required design requirements are satisfied as a whole pressure vessel. However, the weight can be reduced by reducing the material. Specifically, since the thickness of each of the second wall 42 and the third wall 43 is smaller than the thickness of the first wall 41 within a range that satisfies the design requirements required for the pressure vessel, The pressure vessel is reduced in weight.

  In the present embodiment, the dimension L1 in the longitudinal direction of each of the second wall 42 and the third wall 43 is less than or equal to half of the dimension B between the partition wall 40 and the partition wall facing portion 30a. Of the first wall 41 to which a relatively large tensile load acts is sufficiently ensured to facilitate the satisfaction of the design requirements, and the thicknesses of the second wall 42 and the third wall 43, respectively. By making the thickness smaller than the thickness of the first wall 41, it is possible to reduce the weight of the pressure vessel.

  Moreover, in this embodiment, since the connection part of the upper wall main body 11 and the partition 40 is reinforced by the upper wall protrusion part 12, generation | occurrence | production of the stress concentration to this part is suppressed. And since the upper wall main body 11 is reinforced by the upper wall 1st chamber side rib 13a and the upper wall 2nd chamber side rib 13b, a deformation | transformation of this upper wall main body 11 is suppressed. Further, since the upper wall first chamber side rib 13a and the upper wall second chamber side rib 13b have a shape connected to the upper wall protruding portion 12, deformation of the upper wall main body 11 in the vicinity of the connecting portion is further suppressed. As a result, the occurrence of stress concentration near the connection portion is suppressed. The same applies to the bottom wall side.

  Here, a modification of the present embodiment will be described with reference to FIG. As described above, the amount of deformation of the upper wall body 11 when high-pressure gas is sealed in the first chamber and the second chamber of the container body is closer to the connection portion with the peripheral wall 30 than the center portion thereof. Is smaller. Specifically, the second wall other than the first region is larger than the deformation amount of the first region adjacent to the first wall 41 in the thickness direction (Y-axis direction) of the first wall 41 in the upper wall body 11. Region (region of the upper wall body 11 adjacent to the second wall 42 in the thickness direction of the second wall 42, and region adjacent to the third wall 43 in the thickness direction of the third wall 43 of the upper wall body 11 The amount of deformation in the area to be smaller becomes smaller. Therefore, the upper wall first chamber side rib 13a and the upper wall second chamber side rib 13b are higher in the height of the portion standing in the second region than in the height dimension of the portion standing in the first region. The size can be reduced. As described above, the height of the ribs erected in the second region where only a relatively small stress is generated in the upper wall main body 11 is set to the first dimension in which a relatively large stress is generated in the upper wall main body 11. By making it smaller than the height dimension of the rib erected in the region, the strength of the upper wall body 11 can be improved while avoiding a significant weight increase. The same applies to the bottom wall 20 side.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, an example in which the container main body has a rectangular parallelepiped shape that is long in the Y-axis direction is shown, but it may be a rectangular solid shape that is long in the X-axis direction.

  Moreover, in the said embodiment, although the partition opposing part 30a of the surrounding wall 30 showed about the example which has a shape extended in the direction parallel to the longitudinal direction of the partition 40, this partition opposing part 30a is toward the outer side of a container main body. It may be a convex curved surface.

  Moreover, although the upper wall main body 10 showed about the example which has the upper wall protrusion part 12, the upper wall 1st chamber side rib 13a, and the upper wall 2nd chamber side rib 13b in the said embodiment, these are omissible. . Similarly, the bottom wall protrusion 22, the bottom wall first chamber side rib 23a, and the bottom wall second chamber side rib 23b can be omitted.

DESCRIPTION OF SYMBOLS 10 Upper wall 11 Upper wall main body 12 Upper wall protrusion 13a Upper wall 1st chamber side rib 13b Upper wall 2nd chamber side rib 14a Short direction rib 14b Short direction rib 15a Long direction rib 15b Long direction rib 20 Bottom wall 21 Bottom wall main body 22 Bottom wall protrusion 23a Bottom wall first chamber side rib 23b Bottom wall second chamber side rib 30 Peripheral wall 30a Partition facing portion 31 First sidewall 32 Second sidewall 40 Partition 41 First wall 42 Second wall 43 First Three walls

Claims (5)

A pressure vessel having a container main body containing high-pressure gas, and a partition wall formed in the container main body so as to bisect the inside of the container main body into a first chamber and a second chamber,
The container body connects an upper wall connected to the upper end of the partition wall, a bottom wall facing the upper wall and connected to the lower end of the partition wall, and a peripheral edge of the upper wall and a peripheral edge of the bottom wall. And a peripheral wall
The partition wall has a shape that is long in one direction, and the thickness of the second wall located on one end side in the longitudinal direction rather than the thickness of the first wall located in the region including the center in the longitudinal direction of the partition wall; A pressure vessel in which the thickness of the third wall located on the other end side in the longitudinal direction is smaller. The pressure vessel according to claim 1,
The peripheral wall has a partition facing portion that has a shape extending in a direction parallel to the longitudinal direction of the partition and faces the partition.
The longitudinal dimension of the second wall is less than or equal to one half of the dimension between the partition and the partition facing portion, and the longitudinal dimension of the third wall is the partition and the partition. A pressure vessel that is less than or equal to one-half of the dimension between the opposing portions. The pressure vessel according to claim 1 or 2,
The pressure vessel in which the surface of the first wall and the surface of the second wall are smoothly connected, and the surface of the first wall and the surface of the third wall are smoothly connected. The pressure vessel according to any one of claims 1 to 3,
When the high-pressure gas is accommodated in the container body, the first wall is affected by a tensile load in a short direction perpendicular to the longitudinal direction and the thickness direction of the partition wall. The thickness of the first wall is set so that the stress generated in the is uniformly distributed in the first wall,
When the high-pressure gas is accommodated in the container body, the stress generated in the second wall due to the tensile load acting on the second wall acting on the second wall is uniformly distributed in the second wall. So that the thickness of this second wall is set,
When the high-pressure gas is stored in the container body, the stress generated in the third wall due to the tensile load acting on the third wall acting on the third wall is uniformly distributed in the third wall. So that the thickness of this third wall is set. The pressure vessel according to any one of claims 1 to 4,
The upper wall is an upper wall main body connected to an upper end of the peripheral wall and an upper end of the partition wall, and an upper wall first chamber side rib erected on the outer surface of the first chamber side of the upper wall main body, An upper wall second chamber side rib erected on the outer surface of the second chamber side of the upper wall main body,
The bottom wall is a bottom wall main body connected to a lower end of the peripheral wall and a lower end of the partition wall, a bottom wall first chamber side rib erected on the outer surface of the first chamber side of the bottom wall main body, A bottom wall second chamber side rib erected on the outer surface of the bottom wall body of the second chamber side;
The upper wall first chamber side rib and the upper wall second chamber side rib are erected in a first region adjacent to the first wall in the thickness direction of the first wall of the outer surface of the upper wall body. The height dimension of the part erected in the second region other than the first region of the outer surface of the upper wall main body has a smaller shape than the height dimension of the part,
The bottom wall first chamber side rib and the bottom wall second chamber side rib are erected in a third region adjacent to the first wall in the thickness direction of the first wall in the outer surface of the bottom wall body. A pressure vessel having a shape in which the height dimension of the portion erected in the fourth region other than the third region of the outer surface of the bottom wall body is smaller than the height dimension of the portion.

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