TW201405046A - Gas holder, and diaphram used to the same - Google Patents

Abstract

A gas holder and a diaphragm used for the same are provided to facilitate an assembling work by simplifying the attachment part of the diaphragm and not requiring a work space. A gas holder comprises a holder body (1), a diaphragm (2), and a piston (3). The holder body has a lower vessel and an upper vessel. A first flange is installed on the top end of the lower vessel. A second flange welded to the first flange is installed on the bottom end of the upper vessel. The diaphragm has a blade guard part, a cylindrical shape part, and a bottom part. The blade guard part is inserted between the first and second flanges. The cylindrical shape part is extended from the blade guard part. The bottom part blocks the bottom end of the cylindrical shape part. The piston is arranged on the inner side of the cylindrical shape part and is supported to the diaphragm.

Description

Gas container and diaphragm used therefor

The present invention relates to a variable capacity gas container having a diaphragm that seals between a container body and a piston, the piston being raised and lowered inside the container body. Further, the present invention relates to a separator used in such a gas container.

A combustible gas system such as charcoal gas discharged from a steel mill is used as a fuel. In order to cope with the demand change of the combustible gas, the combustible gas system discharged from the steel mill is temporarily stored, for example, in a variable capacity gas container. The variable-capacity gas container is intended to store biogas generated from livestock waste, excrement disposal sludge, etc., or to recover argon discharged or discharged, in addition to storage of charcoal gas discharged from a steel mill. Use of a useful industrial gas such as helium as a buffer tank.

The variable-capacity gas container generally has a configuration in which a liftable piston is placed inside a cylindrical container body having a hermetic structure. The container body and the piston are sealed by appropriate means (for example, refer to Patent Documents 1 and 2 below).

Patent Document 1 discloses a gas container having a structure in which a container made of a rubber is sealed between a container body and a piston. The diaphragm is formed into a cylindrical shape, one end of which is fixed to the outer peripheral portion of the piston, and the other end of which is attached to the inner surface of the side wall of the container body. In the gas container of Patent Document 1, the gas is accommodated in a double structure to increase the gas collection capacity.

Patent Document 2 discloses a gas container having a structure in which a container body and a piston are sealed by a sealing device. The sealing device has a rubber sealing material pressed against the inner surface of the side wall of the container body, and the sealing material is pressed against the inner surface of the side wall by a pressing mechanism. Further, the sealing device has a mechanism for supplying lubricating oil in order to make the sliding of the sealing material of the container body smooth.

However, in the gas container disclosed in Patent Document 1, the separator is formed into a cylindrical shape having pores. Therefore, the mounting portion of the diaphragm to the outer peripheral portion of the piston or the mounting portion to the inner surface of the container body requires an airtight structure, and the mounting structure of the diaphragm becomes complicated. On the other hand, in the gas container disclosed in Patent Document 2, a sealing device having a sealing material pressing mechanism or a lubricating oil supply mechanism is provided. Gas containers with such sealing devices require complex mechanical construction.

Further, in the gas container described in Patent Document 1, it is necessary to attach a separator to the inner surface of the container body when the gas container is assembled. Similarly, in the gas container described in Patent Document 2, it is necessary to install a sealing device in the container body. Therefore, in these conventional gas containers, it is necessary to ensure a work space required for the operator to enter the container body and the piston during assembly. It is ensured that such a work space has a situation in which the entire gas container is enlarged and wasteful space (useless space) is generated.

[Prior patent documents] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 5-18494

[Patent Document 2] JP-A-2008-286255

The present invention has been conceived in this case, and an object thereof is to provide a gas container and a separator suitable for use in the gas container, which is suitable for simplifying the mounting structure of the diaphragm while saving the working space at the time of assembly, and is easy Perform a group work.

A gas container according to a first aspect of the present invention includes a container body having a cylindrical container shape, the lower tube having a first flange provided at an upper end portion, and the upper tube being joined to the first flange The second flange is disposed at the lower end portion; the diaphragm has a flange portion that is sandwiched by the first flange and the second flange; and the cylindrical portion is connected to the flange portion and extends; And a bottom portion that plugs the lower end of the cylindrical portion; the piston is disposed inside the cylindrical portion and supported by the diaphragm.

The piston system has a cylindrical piston tube portion surrounded by a cylindrical portion of the diaphragm and extending in a vertical direction, and a piston bottom portion extending from a lower end of the piston tube portion to the piston barrel portion It is preferred to inwardly and overlap the bottom of the diaphragm.

At the bottom of the diaphragm, a projection that faces upward is provided; and at the bottom of the piston, it is preferable to provide a hole in which the projection is fitted.

The gap between the outer circumferential surface of the piston tube portion and the inner circumferential surface of the upper cylinder is preferably in the range of 50 to 200 mm.

It is preferable to provide a rounded corner having a curvature radius of 2 to 10 mm at a corner portion formed by the lower surface of the bottom portion of the piston and the outer peripheral surface of the cylindrical portion.

The separator is composed of a rubber cloth which is preferably a woven fabric and a synthetic rubber laminated on both sides of the woven fabric.

It is preferable that the direction of the weaving gap of the woven fabric of the cylindrical portion is inclined in the axial direction of the cylindrical portion.

The angle of inclination of the yarn gap direction to the axial direction of the cylindrical portion is preferably in the range of 20 to 40 or 50 to 70.

The cylindrical portion is configured to include a cylindrical base body in which the rubber sheets composed of the rubber cloth are arranged in the circumferential direction; the edge portions of the rubber sheets which are connected to each other are attached to the cylindrical shape The direction in which the axial direction of the base body is inclined extends; the direction in which the edge portion extends is inclined in the axial direction of the cylindrical base body by a range of 20 to 40 or 50 to 70.

In the cylindrical portion, at least three guide rollers are disposed at different positions in the circumferential direction; the guide rollers are in contact with the inner peripheral surface of the upper cylinder, and are preferably rotatable about a horizontal axis.

The cylindrical portion of the diaphragm is preferably connected to the flange portion via an inverted U-shaped folded portion.

The gas container separator according to the second aspect of the present invention comprises a woven fabric and a rubber sheet of synthetic rubber laminated on both sides of the woven fabric, and has a flange portion and is connected to the flange portion. And extending a cylindrical portion and a bottom portion of the lower end of the cylindrical portion; the cylindrical portion is composed of a cylindrical base body, and the cylindrical base system is composed of the rubber cloth The panels are arranged in a circumferential direction.

The direction of the weaving line gap of the woven fabric in the cylindrical portion is inclined in the range of 20 to 40° or 50 to 70° to the axial direction of the cylindrical portion; It is preferable that the edge portions of the rubber sheets joined to each other by the cylindrical base body extend in a direction inclined by a range of 20 to 40 or 50 to 70 in the axial direction of the cylindrical base.

The cylindrical portion is preferably connected to the flange portion via an inverted U-shaped folded portion.

The flange portion includes: a first bent portion formed by forming a plurality of secant lines at intervals in a circumferential direction at one end of the cylindrical base body, and bending a portion including the secant to an outer side; and The second seat plate is formed by sandwiching the first bent portion from both sides in the thickness direction, and is overlapped and joined to each other radially outward of the first bent portion; the bottom portion includes: the second bent portion a portion in which a plurality of secant lines are formed at intervals in the circumferential direction at the other end of the cylindrical base body, and a portion including the secant line is bent to the inner side; and a circular bottom plate is connected to the second bent portion And the third and fourth seat plates sandwich the overlapping portion of the second bent portion and the bottom plate from both sides in the thickness direction, and are radially inward from the second bent portion. It is preferable that the bottom plate is sandwiched at both sides in the thickness direction and joined.

The ring member includes: a planar ring portion corresponding to the flange portion; and a cylindrical ring portion extending from an inner edge of the planar ring portion; one end of the cylindrical base body and the cylindrical ring The tip end of the portion is joined; it is preferable that the cylindrical base portion and the cylindrical ring portion constitute the cylindrical portion.

Other features and advantages of the present invention will become more apparent from the detailed description of the appended claims.

X‧‧‧ gas container

1‧‧‧ container body

11‧‧‧Under tube

113‧‧‧Flange (1st flange)

12‧‧‧Upper tube

123‧‧‧Flange (2nd flange)

2, 2' ‧ ‧ diaphragm

21‧‧‧Flange

22‧‧‧Cylinder

23‧‧‧ bottom

24‧‧‧ Protrusion

28‧‧‧ ring members

281‧‧‧Flat ring

282‧‧‧Cylinder ring

3‧‧‧Piston

31‧‧‧Piston tube

312‧‧‧guide roller

32‧‧‧ piston bottom

32a‧‧‧孔部

41‧‧‧Rubber cloth

41a‧‧‧End

42, 42'‧‧‧Cylindrical matrix

421‧‧‧(1st) bend

422‧‧‧(2nd) bend

431‧‧‧(1) seat board

432‧‧‧(2nd) seat board

44‧‧‧floor

451‧‧ (3rd seat plate)

452‧‧ (4th seat plate)

Fig. 1 is a longitudinal cross-sectional view showing a schematic configuration of a gas container according to an embodiment of the present invention.

Fig. 2 is a plan view showing the gas container shown in Fig. 1.

Fig. 3 is a cross-sectional view of the main portion along the line III-III of Fig. 1.

Fig. 4 is an enlarged view of the main part of Fig. 1.

Fig. 5 is a view for explaining the order of fabrication of the separator.

Fig. 6 is a view for explaining the order of fabrication of the separator.

Fig. 7 is an enlarged cross-sectional view taken along line VII-VII of Fig. 6.

Fig. 8 is a view for explaining the order of fabrication of the separator.

Fig. 9 is a view for explaining the manufacturing sequence of the diaphragm.

Fig. 10 is a view for explaining the manufacturing sequence of the diaphragm.

Fig. 11 is a cross-sectional view showing the cross-sectional structure of the flange portion of the diaphragm in a mode.

Fig. 12 is a view for explaining the order of mounting the projections at the bottom of the diaphragm.

Fig. 13 is an enlarged cross-sectional view showing a main portion along the line XIII-XIII of Fig. 12.

Fig. 14 is a view for explaining the order of mounting the projections at the bottom of the diaphragm.

Fig. 15 is a perspective view showing a schematic configuration of another example of the diaphragm.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 to Fig. 4 show a gas container according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the gas container X of the present embodiment includes a container body 1, a separator 2, and a piston 3.

The container body 1 has a lower tube 11 and an upper tube 12, and the lower tube 11 and the upper tube 12 are integrally combined to form a cylindrical container shape. The lower cylinder 11 has a disc-shaped bottom wall 111 and a cylindrical side wall 112 extending upward from the outer periphery of the bottom wall 111. On the outer circumference of the upper end portion of the side wall 112, an annular flange 113 is integrally provided, and a plurality of bolt holes 113a are formed in the flange 113. At a position lower than the lower end of the lower cylinder 11, a gas introduction port 11A and a gas discharge port 11B are provided. The upper cylinder 12 has a dome-shaped top wall 121 and a cylindrical side wall 122 extending downward from the periphery of the top wall 121. An annular flange 123 is integrally provided on the outer circumference of the lower end portion of the side wall 122, and a bolt hole 123a corresponding to the bolt hole 113a of the flange 113 of the lower cylinder 11 is formed in the flange 123.

The flange 113 and the flange 123 are joined by a bolt 13 (not shown in the second drawing) inserted into each of the bolt holes 113a and 123a. At the time of this joining, the flange portion 21 of the diaphragm 2 to be described later is sandwiched between the flange 113 and the flange 123. Thereby, the lower cylinder 11 and the upper cylinder 12 are fixed in a state of being sealed to each other. In the present embodiment, the inner diameter of the side wall 112 and the inner diameter of the side wall 122 are the same size. When the flanges 113 and 123 are joined, the inner circumferential surface of the side wall 112 and the inner circumferential surface of the side wall 122 are in the vertical direction. Same face (continuous).

As shown in Fig. 1, the diaphragm 2 has a flange portion 21, a cylindrical portion 22, and a bottom portion 23, and is formed in a series of sheets. The separator 2 is made of a rubber cloth, and a method for producing the same will be described later. The flange portion 21 is sandwiched between the flanges 113, 123 and formed in a circular shape. In the present embodiment, the width of the flange portion 21 is larger than the width of the flanges 113, 123.

The cylindrical portion 22 is connected to the inner peripheral edge of the flange portion 21. In the present embodiment, the cylindrical portion 22 is in contact with the piston 3 and surrounds the piston 3. The equation extends to the upper portion, and the portion at the tip end is folded back to the outside in an inverted U shape and extends downward toward the flange portion 21. The inner diameter of the cylindrical portion 22 is, for example, about 1000 mm.

The bottom portion 23 plugs the lower end of the cylindrical portion 22. A needle-like projection 24 having a tip end facing upward is provided on the upper surface of the bottom portion 23. As shown in Fig. 3, in the present embodiment, four projections 24 are provided and are provided at equal intervals along a pitch circle of a predetermined radius. Details of the mounting structure of the bottom portion 23 of these projections 24 will be described later.

As shown in Fig. 1, the piston 3 is disposed inside the cylindrical portion 22 of the diaphragm 2 and supported by the diaphragm 2. The piston 3 is made of, for example, metal, and has a cylindrical piston cylinder portion 31 extending in the vertical direction and a piston bottom portion 32 connected to the lower end of the piston cylinder portion 31. The piston tube portion 31 is surrounded by the cylindrical portion 22 of the diaphragm 2 . The piston bottom portion 32 has a disk shape connected to the lower end of the piston cylinder portion 31, and plugs the lower end of the piston cylinder portion 31.

A guide roller 312 is provided via a mount 311 near the upper end of the piston barrel portion 31. The guide rolls 312 are provided at least three in the circumferential direction at intervals (fixed intervals are preferable). Each of the guide rollers 312 is in contact with the inner peripheral surface of the side wall 122 of the upper cylinder 12, and is rotatable about a horizontal axis. The outer diameter of the piston barrel portion 31 is, for example, about 1000 mm. The gap between the outer circumferential surface of the piston cylinder portion 31 and the inner circumferential surface of the upper cylinder 12 is, for example, 50 to 200 mm, and preferably 100 to 150 mm.

As shown in FIGS. 1 and 3, four hole portions 32a are formed in the piston bottom portion 32. In the present embodiment, the hole portions 32a are penetrated in the thickness direction of the piston bottom portion 32, and are arranged at equal intervals with the same pitch circle as the pitch circle of the arrangement projections 24 so as to correspond to the projections 24 provided on the diaphragm 2. According to this configuration, in a state where the piston 3 is supported by the diaphragm 2, the projections 24 are respectively fitted into the piston bottom 32. The hole portion 32a and the piston bottom portion 32 overlap with the bottom portion 23 of the diaphragm 2. As a result, the piston 3 is positioned in the diaphragm 2.

As shown in Fig. 4, appropriate rounded corners are provided at the corners (boundary portions) of the piston bottom portion 32 and the cylindrical portion 31 of the piston. The rounded corner of the corner portion is, for example, a radius of curvature R of 2 to 10 mm, and a radius of curvature R of about 3 mm is preferable. As a result, the stress concentration on the fillets is alleviated.

Next, an example of the detailed structure and the manufacturing procedure of the separator 2 will be described.

The rubber cloth constituting the separator 2 is formed by laminating a synthetic rubber (for example, neoprene) on both sides of a woven fabric made of fibers. The woven fabric is composed of, for example, a multiaxial synthetic resin fiber, and examples thereof include a 2-axis woven fabric, a 3-axis woven fabric, and the like, and a flat woven fabric which is one of a 2-axis fabric is preferable.

As the rubber cloth used in the production of the separator 2, as shown in Fig. 5, for example, a rubber sheet 4 wound in a roll shape is used. As shown in the pattern diagram of Fig. 5, in the rubber sheet 4, the yarn gap direction (fiber direction) of the fabric is along the width direction and the length direction of the sheet. The width of the rubber sheet 4 is, for example, about 600 to 1200 mm.

When the separator 2 is produced, the rubber sheet 4 is cut along a predetermined length along a cutting line indicated by a broken line to obtain a plurality of rubber sheets 41. In the illustrated embodiment, the cutting direction of the rubber sheet 4 is inclined to the longitudinal direction of the rubber sheet 4. The inclination angle α of the cutting direction to the longitudinal direction is, for example, 60°. In this way, a rubber sheet 41 of the same size of a parallelogram is obtained. Next, as shown in Fig. 6, the edge portions 41a along the longitudinal direction of the rubber sheet 4 are joined to each other with respect to the plurality of pieces of the rubber sheet 41, and as shown in Fig. 8, the rubber sheets 41 are juxtaposed in the circumferential direction. Connected cylindrical substrates 42. Rubber sheet 41 This joining is known from Fig. 7, for example, the edge portions 41a are overlapped with each other and then the slits are joined, and the rubber sheet 41B is bonded from both sides of the overlapping portion, thereby being joined. Here, the edge portion 41a is inclined in the axial direction of the cylindrical base body 42 (the upper and lower directions in Fig. 8). The inclination angle β at which the extending direction of the edge portion 41a is inclined to the axial direction of the cylindrical base member 42 is 20 to 40° or 50 to 70°, and preferably 25 to 35° or 55 to 65°. In the present embodiment, the inclination angle β is 30°.

The cylindrical base body 42 constitutes the cylindrical portion 22 of the diaphragm 2 . In the cylindrical base body 42, the direction of the weaving line gap of the fabric is inclined to the axial direction of the cylindrical base body 42, and the inclination angle γ is 20 to 40° or 50 to 70°, which is 25 to 35° or 55. A range of ~65° is preferred. In the present embodiment, the inclination angle γ is 30°.

Then, the upper portion of the cylindrical base member 42 is folded back to the outside in an inverted U shape, and a secant of a predetermined length is cut at a tip end thereof at a predetermined interval in the circumferential direction. Then, as shown in Fig. 9, the bent portion 421 (first bent portion) is formed by bending the portion including the secant line substantially horizontally to the outside. Next, the bent portions 421 are sandwiched by the seat plates 431 and 432 from both sides in the thickness direction, and joined by an adhesive. As the seat plates 431 and 432, for example, the same rubber cloth as the cylindrical base body 42 is used. As shown in Fig. 10, the seat plates 431 and 432 are each composed of a plurality of divided pieces, and have a circular shape as a whole. In Fig. 10, for the sake of understanding, it is shown that the upper and lower sides are opposite. The width of the seat plates 431, 432 is set to be wider than the width of the bent portion 421 (the size from the base end to the tip end). The whole of the bent portion 421 is sandwiched by the seat plates 431 and 432, and the seat plates 431 and 432 are overlapped with each other closer to the radially outer side than the bent portion 421. At this time, the boundary portions between the adjacent seat plates 431 and the adjacent seat plates 432 do not overlap each other in plan view. and Further, an adhesive is filled between the bent portion 421 and each of the seat plates 431 and 432, and between the overlapping portions of the seat plates 431 and 432, and adhered. As the adhesive, for example, a chloroprene adhesive is used. When the seat plates 431 and 432 are adhered, the space replenishing piece 433 composed of the rubber cloth may be inserted between the adjacent bent portions 421 (see Fig. 10). Further, as shown in Fig. 11, the rubber sheets 434 and 435 may be adhered so as to sandwich the seat plates 431 and 432 from both sides. In this way, the flange portion 21 is formed. Then, a through hole for flange mounting is formed in the flange portion 21. In the eleventh diagram, the cross-sectional structure of the flange portion 21 in the case where the bent portion 421, the seat plates 431 and 432, and the rubber sheets 434 and 435 are laminated via the adhesive 436 is schematically shown. Further, as for the seat plates 431 and 432, an integral ring body may be used instead of the configuration of the plurality of divided pieces.

Next, at a lower end of the cylindrical base member 42, a secant of a predetermined length is cut at intervals in the circumferential direction. Then, as shown in Fig. 9, the bent portion 422 (second bent portion) is formed by bending the portion including the secant to the inner side. At this time, the overlapping portions of the adjacent bent portions 422 are cut off as needed. The circular bottom plate 44 is overlapped and joined to the lower side of the bent portion 422. As the bottom plate 44, for example, the above-described rubber cloth is used, and the diameter is substantially equal to the outer diameter of the cylindrical base member 42. The joining of the bent portion 422 and the bottom plate 44 is performed by, for example, sewing the bent portions 422 and the vicinity of the outer periphery of the bottom plate 44. Then, the bent portion 422 and the bottom plate 44 are sandwiched by the seat plates 451 and 452 from both sides in the thickness direction thereof, and joined by an adhesive. Here, as the seat plates 451 and 452, for example, the same rubber cloth as the cylindrical base body 42 is used. Each of the seat plates 451 and 452 is composed of a plurality of divided pieces, and has a circular shape as a whole. The width of the seat plates 451, 452 is set to be wider than the width of the bent portion 422. Borrowing board 451, 452 clip The overlapping portion of the bent portion 422 and the bottom plate 44 is housed, and the bottom plate 44 is sandwiched radially inward of the bent portion 422. At this time, the boundary portions between the adjacent seat plates 451 and the adjacent seat plates 452 do not overlap each other in plan view. Further, an adhesive is filled between the seat plate 451 and the bent portion 422 and the bottom plate 44, and between the seat plate 452 and the bottom plate 44, and adhered. As the adhesive, for example, a chloroprene adhesive is used. In this way, the bottom 23 is formed. Further, a portion of the cylindrical base body 42 that remains cylindrical is a cylindrical portion 22, and a diaphragm 2 having a flange portion 21, a cylindrical portion 22, and a bottom portion 23 is obtained. Further, as for the seat plates 451 and 452, a single ring body may be used instead of the configuration of the plurality of divided pieces.

Next, an example of a mounting structure of the projections 24 of the bottom portion 23 of the diaphragm 2 will be described.

As shown in FIGS. 12 to 14 , the projections 24 are made of, for example, metal, and are fixed in an upright manner to the metal plate 25 serving as a susceptor. The projections 24 are, for example, needle-shaped having an outer diameter of about 12 mm, and the tips of the projections 24 are tapered to be tapered. The metal plate 25 is surrounded by two sheets 26 and 27 made of a rubber cloth similar to the cylindrical base 42 in a state where the projections 24 are exposed, and the overlapping portions of the sheets 26 and 27 are adhered and fixed. The attachment of the projection 24 of the bottom portion 23 of the diaphragm 2 is performed by bonding the lower surface of the input receiving display portion 27 to the upper surface of the bottom portion 23.

In the present embodiment, the projections 24 are attached using the template 5. The template 5 is used to align the mounting position of the projection 24 with the formation position of the hole portion 32a of the piston bottom portion 32. The template 5 is, for example, a circular ring having an outer diameter of about 700 mm and a width of about 50 mm, and four holes 5a corresponding to the mounting positions of the projections 24 are provided. These holes 5a The inner diameter is slightly larger than the outer diameter of the protrusion 24.

Then, as shown in Fig. 12 and Fig. 13, in a state in which the projections 24 are fitted into the respective holes 5a, the template 5 is fixed so that its center coincides with the center of the bottom portion 23 of the diaphragm 2, and the lower surface of the sheet 27 is bonded. Above the bottom 23 . In this way, the protrusions 24 are placed on the bottom 23 via the sheets 26, 27.

Further, when the hole portion 32a of the piston bottom portion 32 is formed, the template 5 is also used. The position of the template 5 is aligned so that its center coincides with the center of the piston bottom 32, and at the same position as the hole 5a of the template 5, a through hole (hole portion 32a) of the same size is formed at the piston bottom portion 32.

The gas container X of this configuration is assembled as follows. First, the diaphragm 2 is placed inside the lower cylinder 11, and the piston 3 is inserted into the inner side of the cylindrical portion 22 of the diaphragm 2. At this time, the projection 24 provided on the diaphragm 2 is inserted into the hole portion 5a of the piston bottom 32 while being inserted into the hole portion 5a of the piston bottom portion 32, and the template 5 is sandwiched between the piston bottom portion 32 and the bottom portion 23 of the diaphragm 2. Thereby, the core of the center position of the piston 3 and the center position of the diaphragm 2 can be easily performed, and the overlap of the piston bottom 32 and the bottom 23 of the diaphragm 2 can be smoothly performed. Further, when the template 5 is permanently left in a state in which the projection 24 of the diaphragm 2 is fitted into the template 5, as will be described later, when the piston 3 moves up and down, wrinkles can be prevented from occurring on the bottom portion 23 of the diaphragm 2.

Next, the upper cylinder 12 is covered from above the lower cylinder 11, and the flanges 113 and 123 of the lower cylinder 11 and the upper cylinder 12 are joined by bolts 13. Here, the diaphragm 2 is attached to the container body 1 by sandwiching the flange portion 21 on the flanges 113 and 123 in advance. With this operation, the gas container X can be simply assembled.

When the gas container X of the present embodiment is used, the gas is passed through The gas introduction port 11A introduces a gas and discharges the gas through the gas discharge port 11B. Here, when the gas introduction amount exceeds the gas discharge amount, the internal pressure in the lower side region of the container body 1 separated by the diaphragm 2 rises. Thus, under the weight of the piston 3, the diaphragm 2 and the piston 3 surrounded by the diaphragm 2 are pushed up and the gas is stored. As the piston 3 rises, the inner portion of the diaphragm 2 in the cylindrical portion 22 is sequentially folded back to the outer side from the upper end thereof to be gradually reversed. In Fig. 1, the state in which the piston 3 is raised is indicated by a virtual line. On the other hand, if the gas discharge amount exceeds the gas introduction amount, the piston 3 descends and returns to the original position. In this manner, when the gas container X is used, the piston 3 moves up and down within the container body 1 in accordance with the change in the amount of stored gas.

In the gas container X of the present embodiment, the diaphragm 2 has the flange portion 21, the cylindrical portion 22, and the bottom portion 23, and these members are formed in series. The attachment of the diaphragm 2 to the container body 1 is performed by locking the bolt 13 in a state in which the flange portion 21 is sandwiched between the flanges 113, 123. With this mounting structure, the airtight function between the container body 1 (the lower cylinder 11 and the upper cylinder 12) and the diaphragm 2 is maintained. Therefore, according to this configuration, the attachment structure of the diaphragm 2 can be simplified. Further, when the diaphragm 2 is attached, since the operator does not have to enter the inside of the container body 1, the attachment work of the diaphragm 2 can be easily performed. Therefore, the gas container X system can reduce wasted useless space while making the gas smaller and suitable for miniaturization.

As described above, the flange portion 21 has one end portion in which the bent portion 421 is formed on the cylindrical base member 42, and the bent portion 421 is separated from the two by the seat plates 431 and 432 which are wider than the bent portion 421. The composition of the side clamps. According to this configuration, the diaphragm 2 is formed into a series of sheets from the cylindrical portion 22 to the flange portion 21, and the airtight function is appropriately maintained. Regarding the bottom portion 23, having the bent portion 422 formed At the other end of the cylindrical base member 42, the bent portion 422 and the circular bottom plate 44 are sandwiched from both sides by the seat plates 451 and 452 which are wider than the bent portion 421. With this configuration, the diaphragm 2 is formed into a series of sheets from the cylindrical portion 22 to the bottom portion 23, and the airtight function is appropriately maintained. Further, in this manner, the flange portion 21 includes the bent portion 421, the seat plates 431 and 432, and the bottom portion 23 includes the bent portion 422, the bottom plate 44, and the seat plates 451 and 452, in response to the gas container X. The size of the separator 2 can be easily made by making the size of the separator 2 different.

Since the separator 2 is composed of a rubber cloth formed by laminating synthetic rubber on both sides of the fabric, it is advantageous in strength. When the piston 3 moves up and down, the cylindrical portion 22 repeats the operation of reversing while bending as the piston 3 moves up and down. In the present embodiment, referring to Figs. 8 and 9, it can be understood that the direction of the yarn gap (fiber direction) of the woven fabric of the cylindrical portion 22 is in the axial direction of the cylindrical portion 22 (the moving direction of the piston 3). )tilt. Therefore, when the cylindrical portion 22 is bent and inverted, even if it is bent at a right angle, the fibers of the woven fabric are bent to an obtuse angle larger than a right angle. Further, since the joint portion (end portion 41a) of Fig. 7 in which the rubber sheets 41 are connected to each other in the circumferential direction is also inclined at the same inclination angle β as the fiber direction, the same effect is obtained, and the cylindrical portion is formed. The load on the fabric of the portion 22 is alleviated. This helps to improve the durability of the diaphragm 2.

In the present embodiment, the inclination angle γ of the woven fabric gap direction (fiber direction) of the woven fabric of the cylindrical portion 22 of the diaphragm 2 is inclined to 20 to 40° or 50° in the axial direction of the cylindrical portion 22. 70° range. When the direction of the yarn gap (fiber direction) of the cylindrical portion 22 is inclined by 45° with respect to the axial direction of the cylindrical portion 22, the tension in the vertical direction is easy to extend. Therefore, in the present embodiment, By setting the inclination angle γ to the range not including 45°, the deformation of the diaphragm 2 can be suppressed. This helps to improve the durability of the diaphragm 2.

In the present embodiment, the cylindrical portion 22 of the diaphragm 2 is configured to include a cylindrical base member 42 which is formed by connecting the rubber sheets 41 composed of a rubber cloth at an inclination angle β in the circumferential direction. . According to this configuration, when the rubber sheet 41 is cut out, if the cutting direction is appropriately adjusted, the separator 2 having the inclination angle γ in the yarn gap direction of the fabric of the separator 2 at a desired angle can be easily produced.

As shown in the description of Fig. 4, the corners formed by the lower surface of the piston bottom portion 32 and the outer surface of the piston cylinder portion 31 are appropriately rounded. Thereby, at the lower end of the cylindrical portion 22, the bending angle of the fibers of the woven fabric constituting the cylindrical portion 22 is alleviated. Therefore, the load acting on the fabric of the cylindrical portion 22 is alleviated. This helps to improve the durability of the diaphragm 2.

In the present embodiment, the piston 3 (the piston tube portion 31) is provided with a guide roller 312 which is in contact with the inner peripheral surface of the side wall 122 of the upper cylinder 12 at a position different from each other in the circumferential direction around the horizontal axis. Rotate freely. As a result, when the piston 3 moves up and down, the guide roller 312 moves in the vertical direction while maintaining contact with the inner surface of the side wall 122. Therefore, the piston 3 is supported by the container body 1 (the upper tube 12) via the guide roller 312, and the piston 3 can be prevented from tilting with the vertical movement.

Further, in the configuration in which the guide roller 312 is provided in this manner, the gap between the outer circumferential surface of the piston cylinder portion 31 and the inner circumferential surface of the upper cylinder 12 is relatively narrow, and is 50 to 200 mm. If the gap is narrowed in this manner, it is preferable to suppress the inclination of the piston 3, and it is also suitable for downsizing of the gas container X.

The specific embodiments of the present invention have been described above, but the present invention is not limited thereto, and various modifications can be made without departing from the spirit and scope of the invention. The specific configuration of each part of the gas container and the separator of the present invention is not limited to the above embodiment.

In the above-described embodiment, the flange portion 21 of the diaphragm 2 is exemplified by the bent portion 421 that bends the cylindrical base member 42, but the flange portion can also be used with the cylindrical base member. 42 different components are composed. Fig. 15 is a view showing an example of a diaphragm which constitutes a flange portion by a member different from the cylindrical base. The diaphragm 2' shown in Fig. 15 has a ring member 28. The ring member 28 has a planar ring portion 281 corresponding to the flange portion and a cylindrical ring portion 282 extending from the inner edge of the planar ring portion 281. One end of the cylindrical base member 42' is joined to the tip end of the cylindrical ring portion 282 by, for example, stitching or bonding, and the cylindrical base portion 42' and the cylindrical ring portion 282 form a cylindrical portion. According to this configuration, the ring member 28 can be formed by molding. For example, when the size of the diaphragm 2' is relatively large, it is suitable to improve the productivity.

X‧‧‧ gas container

121‧‧‧ top wall

312‧‧‧guide roller

3‧‧‧Piston

12‧‧‧Upper tube

31‧‧‧Piston tube

32‧‧‧ piston bottom

122‧‧‧ side wall

1‧‧‧ container body

22‧‧‧Cylinder

311‧‧‧Installation

312‧‧‧guide roller

23‧‧‧ bottom

123a‧‧‧Bolt hole

13‧‧‧ bolt

123‧‧‧Flange

21‧‧‧Flange

11‧‧‧Under tube

2‧‧‧Separator

11A‧‧‧ gas inlet

11B‧‧‧ gas discharge

113‧‧‧Flange

113a‧‧‧Bolt hole

112‧‧‧ side wall

24‧‧‧ Protrusion

111‧‧‧ bottom wall

32a‧‧‧孔部

Claims (16)

A gas container comprising: a cylindrical container-shaped container body, wherein: a lower cylinder having a first flange provided at an upper end; and an upper cylinder having a second flange joined to the first flange at a lower end The diaphragm has a flange portion that is sandwiched by the first flange and the second flange, a cylindrical portion that is connected to the flange portion and extends, and a bottom portion that plugs the portion a lower end of the cylindrical portion; a piston disposed on the inner side of the cylindrical portion and supported by the diaphragm. The gas container of claim 1, wherein the piston has a cylindrical piston tube portion surrounded by a cylindrical portion of the diaphragm and extending in an up-and-down direction; and a piston bottom portion from the piston The lower end of the barrel extends inwardly of the piston barrel and overlaps the bottom of the diaphragm. A gas container according to claim 2, wherein a protrusion facing upward is provided at a bottom portion of the diaphragm; and a hole portion into which the protrusion is fitted is provided at a bottom portion of the piston. The gas container according to claim 2, wherein a gap between an outer circumferential surface of the piston cylinder portion and an inner circumferential surface of the upper cylinder is in a range of 50 to 200 mm. A gas container according to claim 2, wherein a corner portion formed by a lower surface of the bottom portion of the piston and a peripheral surface of the piston tube portion is provided with a rounded corner having a radius of curvature of 2 to 10 mm. The gas container according to any one of claims 1 to 5, wherein the separator is made of a rubber cloth; the rubber cloth comprises a fabric, and a synthetic rubber layer laminated on both sides of the fabric. gum. The gas container according to claim 6, wherein the woven line gap direction of the woven fabric of the cylindrical portion is inclined toward the axial direction of the cylindrical portion. The gas container according to claim 7, wherein the yarn gap direction is inclined by an angle of 20 to 40 or 50 to 70 in the axial direction of the cylindrical portion. The gas container of claim 6, wherein the cylindrical portion is configured to include a cylindrical substrate in which the rubber sheets composed of the rubber cloth are arranged in a circumferential direction; the rubber sheet is connected The edge portions of each other extend in a direction inclined to the axial direction of the cylindrical base body; the direction in which the edge portion extends is inclined at an inclination angle of 20 to 40° or 50 to the axial direction of the cylindrical base body ~70° range. The gas container of claim 2, wherein at least three guide rollers are disposed at different positions in the circumferential direction of the piston tube portion; the guide rollers are in contact with the inner circumferential surface of the upper cylinder, and are wound around The horizontal axis rotates freely. The gas container according to any one of claims 1 to 5, wherein the cylindrical portion of the diaphragm is connected to the flange portion via an inverted U-shaped folded portion. A gas container separator comprising a woven fabric and a rubber sheet of synthetic rubber laminated on both sides of the woven fabric, and has a flange portion, a cylindrical portion connected to the flange portion and extending, and a plug The bottom of the lower end of the cylindrical portion; The cylindrical portion is composed of a cylindrical base body, and the cylindrical base system is formed by arranging rubber sheets composed of the rubber cloth in a circumferential direction. The gas container separator according to claim 12, wherein the direction of the yarn gap of the fabric in the cylindrical portion is 20 to 40° or 50 to 70° to the axial direction of the cylindrical portion. The range is inclined; the edge portions of the rubber sheets connected to the cylindrical substrate are inclined in a direction of 20 to 40° or 50 to 70° in the axial direction of the cylindrical substrate. extend. The gas container separator according to claim 12, wherein the cylindrical portion is connected to the flange portion via an inverted U-shaped folded portion. The separator for a gas container according to any one of claims 12 to 14, wherein the flange portion includes: a first bent portion, and a plurality of ends of the cylindrical base body are formed at intervals in a circumferential direction a secant line, wherein the portion including the secant is bent to the outside; and the first and second seat plates sandwich the first bent portion from both sides in the thickness direction, and is larger than the first bend The portions are overlapped and joined to each other closer to the radially outer side; the bottom portion includes: a second bent portion at which the plurality of secant lines are formed at intervals in the circumferential direction at the other end of the cylindrical base body, and the portion including the secant line is included a bottom plate formed by folding to the inside; a circular bottom plate overlapping and joining the second bent portion; and third and fourth seat plates sandwiching the second bent portion from both sides in the thickness direction The overlapping portion of the bottom plate is joined to the bottom plate from both sides in the thickness direction on the radially inner side of the second bent portion. A diaphragm for a gas container according to any one of claims 12 to 14, Wherein the ring member has: a planar ring portion corresponding to the flange portion; and a cylindrical ring portion extending from an inner edge of the planar ring portion; one end of the cylindrical base body and the cylinder The tip end of the ring portion is joined; and the cylindrical portion and the cylindrical ring portion constitute the cylindrical portion.