WO2004061353A1 - 接続装置 - Google Patents
接続装置 Download PDFInfo
- Publication number
- WO2004061353A1 WO2004061353A1 PCT/JP2003/017038 JP0317038W WO2004061353A1 WO 2004061353 A1 WO2004061353 A1 WO 2004061353A1 JP 0317038 W JP0317038 W JP 0317038W WO 2004061353 A1 WO2004061353 A1 WO 2004061353A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- groove
- hollow
- ring
- connection
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 28
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 202
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 101
- 239000001569 carbon dioxide Substances 0.000 claims description 101
- 229920001971 elastomer Polymers 0.000 claims description 27
- 239000005060 rubber Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 24
- 239000011347 resin Substances 0.000 claims description 24
- 239000012466 permeate Substances 0.000 claims description 9
- 239000002861 polymer material Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 229920001059 synthetic polymer Polymers 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 251
- 230000000694 effects Effects 0.000 description 19
- 238000001816 cooling Methods 0.000 description 15
- 239000003507 refrigerant Substances 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000012856 packing Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 230000035699 permeability Effects 0.000 description 6
- 229920005549 butyl rubber Polymers 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920006122 polyamide resin Polymers 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006350 polyacrylonitrile resin Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920006235 chlorinated polyethylene elastomer Polymers 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- -1 perfluoro Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/035—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed around the spigot end before connection
Definitions
- the present invention relates to a sealing device or a connecting device for preventing or reducing the leakage of a pressurized gas from a connection portion of a connection hollow member connecting a pipe through which a pressurized gas passes. More specifically, the present invention relates to a sealing device or a connection device in which the permeation of gas from a sealing member is reduced to improve a sealing effect.
- a refrigerant flows through a pipe.
- a higher pressure for example, a carbon dioxide gas pressurized to a pressure of about ⁇ 5 MPa
- a carbon dioxide gas pressurized to a pressure of about ⁇ 5 MPa flows through the inside of the pipe than when fluorocarbon gas is used.
- a rubber seal member such as a ring and a knock-up ring are usually used.
- the seal member is disposed so as to seal between the surface to be sealed of one hollow member for connection provided at the connection part of the pipe and the surface to be sealed of the other hollow member for connection.
- the back-up ring prevents the seal member such as a ring from deforming due to the pressure of the pressurized gas and protruding between the pipes due to the pressure difference between the gas pressure inside the pipe and the pressure outside the pipe.
- the backup ring is sealed by the pressure difference between the inside of the pipe through which pressurized carbon dioxide gas flows and the outside of the pipe. It is arranged to support the seal member in the moving direction in which the sealing member moves.
- the back coupling has a rectangular (rectangular) cross-sectional shape.
- Japanese Patent Application Laid-Open Publication No. 2000-210201 it is made of polyamide resin and has a U-shaped or Y-shaped gasket. There is also known a method of sealing a pipe through which carbon dioxide gas flows.
- carbon dioxide gas has the property of permeating rubber used as a sealing member.
- the pressure of the carbon dioxide gas is increased as described above, the carbon dioxide gas permeates the rubber more easily.
- An object of the present invention is to provide a connection device (or dense device) that can easily and effectively seal between connected members even when a general-purpose seal member through which a pressurized gas easily passes is used. (Sealing device).
- a gas sealing means that is deformed in response to pressure and a connecting portion formed of a material that does not allow the pressurized gas to pass therethrough and that has a hollow portion that allows the pressurized gas to pass therethrough are configured.
- the groove in which the gas sealing means is provided is formed at a connecting portion between the first and second connection hollow members, and is formed in a path through which the pressurized gas leaks and is discharged.
- the connecting device which is small and is deformed by a pressure difference between the high pressure and the low pressure, to prevent the gas from leaking from a gap in the second portion of the groove. Provided.
- the gas sealing means is deformed by the pressure of the pressurized gas introduced into the first portion of the groove, expands radially in the second portion, and closes the gap between the second portion. It is so narrow that the gas does not leak from the gap.
- the pressurized gas is heated
- the gas sealing means is formed of a material that is heated by the temperature of the heated pressurized gas and further expands in the second portion in the radial direction. I have.
- the gas sealing means is provided in the first portion of the groove, and the rubber second gas sealing member deformed in the groove by pressing the pressurized gas;
- the first gas seal member is formed of a material that is less deformable than the first gas seal member, and the groove portion is formed adjacent to the first gas seal member so as to suppress the movement of the first gas seal member due to the pressing of the pressurized gas.
- the first gas sealing member is disposed in two portions, and is expanded in the vertical direction in the second portion of the groove by the pressure due to the deformation and movement of the first gas seal member, so that the gap of the second portion is removed from the gas through the gap.
- a second gas seal member which is narrowed to a level that does not leak.
- the first gas seal member is a rubber O-ring
- the second gas seal member is formed of a resin or a synthetic polymer material that does not allow the pressurized gas to pass therethrough.
- the second portion of the groove is inclined in the direction in which the gas is discharged so as to be shallower than the depth of the first portion, and the second portion of the groove of the second gas seal member is formed.
- the portion in contact with the inclined surface of the portion is inclined, and can be moved on the inclined surface of the second portion of the groove when the pressure is applied by the pressurized gas.
- the angle of the inclined surface of the second gas seal member that is in contact with the second portion of the groove is greater than the angle of the inclined surface of the second portion of the groove, and the first gas seal member is pressed by the pressurized gas to be the first angle.
- the tip of the inclined surface of the gas seal member is crushed to further narrow the gap between the second portions.
- the pressurized gas is pressurized carbon dioxide.
- the first and second connection hollow members each have a hollow portion to which the first pipe and the first pipe are fitted and connected.
- first gas seal member and the second gas seal member are used as gas seal means, more effective gas leakage can be achieved.
- FIG. 1 is a sectional view of the connection device according to the first embodiment of the present invention.
- FIG. 2 is a partially enlarged view of the connection device illustrated in FIG.
- 3A to 3C are a cross-sectional view and a front view of the back-up ring illustrated in FIGS.
- FIG. 4 is a partially enlarged view of a connection device according to a modification of the first embodiment of the present invention.
- 5A and 5B are partially enlarged views of a connection device according to another modification of the first embodiment of the present invention.
- 6A to 6C are diagrams illustrating the effect of the backup ring applied to the connection device of the present invention.
- FIGS. 7A and 7B are diagrams illustrating the shape and effects of the first embodiment of the backup ring in the connection device according to the first embodiment of the present invention.
- FIGS. 8A and 8B are diagrams illustrating the shape of a backup ring according to the second embodiment in the connection device according to the first embodiment of the present invention, and its effects.
- 9A and 9B are a cross-sectional view and a partially enlarged view of a connection device according to a second embodiment of the present invention.
- FIGS. 10 and 10 are a cross-sectional view and a partially enlarged view of a connection device according to a third embodiment of the present invention.
- FIG. 12 is a sectional view of a connection device according to a fourth embodiment of the present invention and a partially enlarged view thereof.
- FIG. 13 is a cross-sectional view of a connection device according to a fifth embodiment of the present invention, which is a combination of the connection device of the first embodiment and the connection device of the third embodiment.
- FIG. 14 is a cross-sectional view of a connection device according to a sixth embodiment of the present invention, which is a combination of the connection device of the first embodiment and the connection device of the fourth embodiment.
- FIG. 15 is a cross-sectional view of a connection device according to a seventh embodiment of the present invention, which is a combination of the connection device of the second embodiment and the connection device of the second embodiment.
- pressurized carbon dioxide gas used as a refrigerant of a cooling device
- pressurized carbon dioxide gas used as a refrigerant of a cooling device
- Two connections that connect two pipes as an example of a leaking part Of the pressurized carbon dioxide gas from the connecting portion of the hollow member for use is exemplified.
- the pressurized carbon dioxide gas used as the refrigerant of the cooling device may be heated to about 40 to 80, for example, and this is referred to as pressurized heated carbon dioxide gas.
- the present invention is not limited to such an example.
- FIG. 1 is a cross-sectional view illustrating a gas pipe connection device as a sealing device according to a first embodiment of the present invention
- FIG. 2 ′ is a partially enlarged view of a connection portion illustrated in FIG.
- FIG. 3A is a cross-sectional view of the pack-up ring
- FIG. 3B is a front view of the first form of the packing ring
- FIG. 3C is a front view of the second form of the backup ring.
- FIG. 4 is a view illustrating another form of the second connection member.
- the connection device 1 includes a second pipe 3., a second pipe 5, a second pipe connection member 7, a second pipe connection member 9, and a seal member 11 as a first gas seal member of the present invention. And a backup ring 13 as a second gas seal member of the present invention.
- the first gas seal member and the second gas seal member constitute the gas seal means of the present invention.
- a hollow second piping connection member (hereinafter abbreviated as the first connection member) through which pressurized and heated carbon dioxide gas (CO 2 ) passes along the axial center C—C of the first piping 3 and the second piping 5.
- a hollow second pipe connection member (hereinafter abbreviated as a second connection member) 9 is an embodiment of the second connection hollow member of the present invention. It is an aspect.
- the first connection member 7 includes a main body 70 and a housing 7 connected to the main body 70.
- a first hollow portion 71 and a second hollow portion 72 communicating with the first hollow portion 71 are formed in the main body portion 70, and a second hollow portion 72 in the housing portion 17 is formed.
- a third hollow portion 73 is formed, which communicates with the third hollow portion.
- the cross section of main body 70 and housing 17 is circular.
- the first to third hollow portions 71 to 73 serving as passages for the pressurized carbon dioxide gas are formed coaxially and communicate with each other.
- the second connection member 9 includes a shaft portion 19 having a circular cross section inserted into the third hollow portion 73 of the first connection member 7, and a third portion of the first connection member 7 connected to the shaft portion 19.
- a main body 90 having a surface in contact with the tip of the hollow portion 73, a fourth hollow portion 9 formed at the other end of the main body 90, and a fourth hollow portion extending from the tip of the shaft portion 19; It has a fifth hollow portion 9 3 that is continuous with (communicates with) 9 2. Fourth and fifth hollow portions 92 and 93 serving as passages for the pressurized carbon dioxide gas are formed coaxially and communicate with each other.
- the inner diameter of the first hollow portion 71 is formed to an outer diameter to which the pipe 3 can be fitted.
- the inner diameter of the fourth hollow portion 92 is formed to an outer diameter in which the pipe 5 can be fitted.
- the inner diameter of the third hollow portion 73 is in a recessed state where the ring 11 and the backup ring 13 are mounted (disposed) in the groove 19 G formed in the shaft portion 19.
- the size is such that a predetermined clearance is ensured so that the shaft portion 19 can be inserted into the third hollow portion 73 while the shaft contacts the third hollow portion 73.
- the predetermined clearance (gap) is provided between the shaft portion 19 and the third hollow portion 73. 20) is defined ⁇ ⁇
- the inner diameter of the second hollow portion 72 is formed to have a size that allows the passage of pressurized carbon dioxide gas while maintaining the strength of the main body portion 70.
- the inner diameter of the fifth hollow portion 93 is formed to a size that allows the pressurized carbon dioxide gas to pass while maintaining the strength of the main body portion 90 and the shaft portion 19.
- the inner diameter of the second hollow portion 72 is the same as the inner diameter of the fifth hollow portion 93, or the inner diameter of the third hollow portion 73 is somewhat larger than the inner diameter of the fifth hollow portion 93.
- the first connection member 7 is connected to the first pipe 3
- the second connection member 9 is connected to the second pipe 5
- the second connection member 9 and the second connection member 9 are connected to form the first pipe 3.
- 3 communicates with the second pipe 5.
- the pipe 3 is fitted into the first hollow portion 7 until the wall surface of the second hollow portion 72 of the connecting member 7 and the end of the pipe 3 abut against each other. And by welding the outer surface CL 1 of the abutment, and connecting Ensure that no gas leaks from the part.
- the connection method between the pipe 5 and the connection member 9 is the same as above. That is, the pipe 5 is fitted into the fourth hollow part 92 until the end of the wall of the fifth hollow part 93 of the second connecting member 9 and the end of the pipe 5 are in contact with each other, and the outer surface CL of the contact part is 2 is connected by welding, and gas is not leaked from the connection.
- a flow passage 7a through which the pressurized carbon dioxide gas passes is defined in the second hollow portion 72 communicating with the pipe 3, and similarly, inside the connecting member 9 is connected to the pipe 5.
- a flow passage 9a through which the # 1 pressure carbon dioxide gas passes is defined in the fifth hollow portion 93 through which the gas flows.
- connection member 7 When connecting the second connection member 7 connected to the pipe 3 and the second connection member 9 connected to the pipe 5, after inserting the shaft portion 19 into the third hollow portion 73, the connection member 7
- the connecting members 9 are firmly connected to each other by, for example, fastening with bolts (not shown) .o
- Carbon dioxide gas flows through the flow paths 7 a and 9 a, which are defined and communicated when the connection member 7 and the connection member 9 are connected, and the pipes 3 and 5.
- the carbon dioxide gas flows from the pipe 3 toward the pipe 5.
- carbon dioxide gas used as a refrigerant for the cooling device flows under pressure of, for example, about 15 MPa.
- the carbon dioxide gas may be heated to, for example, about 40 to 80 ° C.
- the pipes 3 and 5 and the connection members 7 and 9 are formed of a material that does not allow carbon dioxide gas to permeate to the outside even when a carbon dioxide gas pressurized to 15 MPa flows, for example, metals such as copper and stainless steel.
- the shaft portion 19 has a groove 19G.
- the groove 19G has a flat bottom surface 19B, an inclined surface (taper surface) 19, and a flat bottom surface 19B and a tapered surface 19T on both sides of the wall 19W1, 19W2.
- the groove 19G having such a cross section is formed annularly in a circumferential direction orthogonal to the axial direction of the shaft portion 19.
- the groove 19G having the tapered surface ⁇ 9T is This corresponds to an embodiment of the gap narrowing means in the invention.
- the tapered surface 19 T is continuous with the flat bottom surface 19 B, and the depth of the groove 19 G is shallow from the end of the bottom surface 19 B to the right wall ⁇ 9W2 in the direction in which the carbon dioxide gas flows. It is inclined at a predetermined angle so that As indicated by the arrows, the direction in which the carbon dioxide gas leaks is that the pressurized carbon dioxide gas passes through the connected connecting members 7 and 9 and communicates to the outside, leaks, and is more inward than the inside of the connecting members 7 and 9. The direction in which the pressure decreases. Therefore, the groove of the tapered surface 19T becomes shallower from the flat bottom surface 19B toward the right wall 19W2 toward the low pressure LS side where the pressure becomes lower than the pressure in the groove 19G. It has such a shape. In other words, the cross-sectional area (first cross-sectional area) of the flat bottom surface 19B is larger than the cross-sectional area (second cross-sectional area) of the tapered surface 19T.
- the flat bottom surface 19B corresponds to the first portion of the groove of the present invention, and the tapered surface ⁇ 9T corresponds to the second portion.
- the groove 19G is provided with a seal member 11 as an example of a first gas seal member of the present invention and a backup ring 13 as an example of a second gas seal member of the present invention.
- the seal member 11 of the present embodiment will be described by taking, as an example, a ⁇ ring made of a rubber material which is easily deformed by application of pressure and has elasticity and elasticity.
- the ring 11 is mounted in contact with the bottom surface 19 B of the groove 19 G of the shaft portion 19.
- the rubber material used for the ring 11 include fluoro rubber, perfluoro rubber, hydrogenated nitrile rubber, nitrile rubber, butyl rubber, ethylene propylene rubber, ethylene propylene gen rubber, chlorinated polyethylene rubber, chlorosulfonated polyethylene rubber, Epiclorhydrin rubber and the like can be mentioned.
- the knock-up ring 13 is formed in a ring shape as illustrated in FIGS. 3A to 3C, and the taper surface which is on the lower pressure side from the position of the bottom surface 19 B where the ring 11 is mounted 9 Mounted at T position.
- FIG. 3A is a cross-sectional view of the backup ring 13 at line A—A in FIG. 3A, and FIGS. 3B and 3C are respectively from the first wall 19 W 2 to the second wall 19 W 1.
- FIG. 3A which is a front view of the first and second forms of the backup ring 13 when viewed once, the inclined surface of the backup ring 13 faces the tapered surface 19 T, and It is a portion that comes into contact with the third hollow portion 73 of the housing portion 17.
- the inclined surface of the knock-up ring 13 is formed so as to have the same inclination as the tapered surface 19T or to have a different inclination from the tapered surface 19T as described later.
- the inclined surfaces are indicated by narrow hatching.
- the pack-up ring 13 is desirably formed in a complete ring shape that makes one round in the groove 19 G from the viewpoint of preventing pressurized carbon dioxide gas from leaking. .
- the backup ring 13 is not made of a material that can expand and contract like the 0 ring 1 1, and it is not as easy to install it in the groove ⁇ 9 G as the ⁇ ring 11 that is elastic.
- a notch-type backup ring 13 in which a part of the ring is cut may be used, and the notch may be slightly widened and arranged in the groove 9G.
- the structure illustrated in FIG. 4 is also referred to as a groove 19G.
- the O-ring 11 is extendable and contractable.
- the groove 19G may have the shape illustrated in FIG. 2 or the shape without the wall 19W1 illustrated in FIG.
- the groove 19 G has a small diameter portion into which the 0 ring 11 can be fitted, for example, a bottom surface 19 B, and a tapered surface on which the backup ring 13 is mounted, for example, a tapered surface 19 T, and a press. If there is a wall 1 9 W 2 where the moved back-up ring 1 3 abuts and stops moving ⁇
- a supporting surface ⁇ 3 S that supports the ring 11 is deformed by pressing and moves to the backup ring 13 side. Is provided.
- ⁇ Ring 11 as the first gas seal member has the property of not transmitting non-pressurized air, that is, air that is normally under pressure such as atmospheric pressure air, and also transmits pressurized carbon dioxide gas as much as possible. It is desirable not to let them.
- the O-ring 11 is first required to be fitted to the flat bottom surface 19 B and made to be stretchable, and secondly, it is desired that the O-ring 11 be general-purpose in terms of price.
- the general-purpose rubber O-ring 11 may transmit compressed carbon dioxide gas.
- the pressurized carbon dioxide gas is designed so as to be able to permeate the ring 1 slightly.
- the backup ring 13 as the second gas seal member is formed of a material that does not allow pressurized carbon dioxide gas to pass therethrough.
- the back-up ring 13 is not elastic and easily deformable like the O-ring 11, and it is desirable that the back-up ring 13 has elasticity such that it slightly deforms when pressure is applied and returns when the pressure is released. .
- Such a backup ring 13 is made of, for example, polyacrylonitrile resin, polyvinyl alcohol resin, polyamide resin, polyvinyl fluoride resin, high-density polyethylene resin, polystyrene resin, PEEK resin, PPS resin, LCP resin, polyimid. It is formed of a resin material such as resin. These resin materials have a property that carbon dioxide gas hardly permeates.
- knock-up ring 13 is made of a synthetic polymer material, and is not easily permeable to gases such as 46-inch gas.
- the 0-ring 11 normally comes into contact with the inner wall of the hollow portion 73 of the housing portion 17 and receives pressure. Shrinkage is caused by the compressive force, and the space between the inner wall of the hollow portion 73 of the housing portion 17 and the groove 19 G of the shaft portion 19 is kept confidential to the outside air (sealed).
- the “confidential state with respect to the outside air” means a state in which the outside air at atmospheric pressure does not enter the third hollow portion 73.
- the back-up ring 13 attached to the bottom of the groove 19 G and a part of the tapered surface 19 T or a part of the tapered surface 19 T Depending on the mounting position at 9 T, it does not project or protrudes from the outer diameter of the shaft portion 19. Even if the backup ring 13 projects beyond the outer diameter of the shaft portion 19, the amount of projection of the backup ring 13 differs depending on where on the tapered surface 19 ⁇ the backup ring 13 is mounted. When the pack-up ring 13 is mounted on the tapered surface 19 mm toward the wall 19 W2, the amount of protrusion from the shaft portion 19 increases. Normally, as shown in FIG.
- the pack-up ring 13 is slightly separated from the wall 19 W 2 in the groove 19 G, and the O-ring 11 is fitted to the bottom surface 19 ⁇ .
- the contact ring 13 comes into contact with the inner wall of the third hollow portion 73 and the taper surface 19 ⁇ is formed by the pressure. It may be shifted and move to the bottom ⁇ 9 ⁇ side. In this case, the backup ring 13 may or may not contact the inner wall of the third hollow portion 73.
- the ring 11 is in contact with the inner wall of the hollow portion 73, so that the space between the groove 19G of the shaft portion 19 and the third hollow portion 73 is kept ⁇ confidential to outside air ''. .
- the ring 11 is connected to the hollow portion of the housing portion 17. 7
- the first sealed surface S 1 on the inner peripheral surface of 3 and the second sealed surface S 2 of the groove 19 G of the shaft 19 The space between 1 and the second sealed surface S2 is kept confidential (sealed) to the outside of the connection device 1.
- this ring 1 is not sufficient for the leakage of pressurized carbon dioxide gas, and a backup ring 13 is required for sufficient measures against the leakage of pressurized carbon dioxide gas.
- the ring 11 is formed inside the connecting members 7 and 9 That is, the pressure difference between the third hollow portion 73 (the passage 7 a) and the outside of the connection member 7 and the outside of the connection member 9 is received. .
- the O-ring 11 receiving the pressure is pressed to the low pressure LS side shown in FIG. Low pressure L
- the S side corresponds to the non-pressurized side of the carbon dioxide gas fed to the connection device 1 and sent.
- the 0 ring 11 receiving the pressure of pressurized carbon dioxide is supported by the support surface 13 S of the backup ring 13. For this reason, the backup ring 13 is further pressed toward the low pressure LS side, that is, toward the inner wall 1 by the 0 ring 11 1 which is pressed and deformed due to the difference in pressure, and the tapered surface 19 T And move up to abut the inner wall ⁇ 9 W2.
- the elastic backup ring 13 made of resin or polymer material expands its diameter in the ⁇ direction orthogonal to the pressing direction by the compressive force in the axial direction, and comes into contact with the tapered surface 19 T
- the inner peripheral surface is elastically deformed until it comes into close contact with the inclined surface (one tapered surface), that is, the second sealed surface S2, and the outer peripheral surface that is in contact with the inner wall of the hollow portion 73, that is, the second sealed surface S1.
- the tip of the inclined surface of the backup ring 13 is thin, so it is elastically deformed.
- the pressurized carbon dioxide gas as a refrigerant is heated to, for example, 40 to 80 ° C. Therefore, not only the 0 ring 11 but also the backup ring 13 is heated and easily deformed. In particular, the tip of the inclined surface of the backup ring 13 is thin and thus easily elastically deformed.
- the gap 20 S existing between the surfaces S 1 and S 2 to be sealed and the support surface 13 S of the backup ring 13 becomes very narrow or the gap substantially disappears, and the gap 20 The amount of carbon dioxide gas that passes through part S is extremely reduced or cannot pass.
- a groove 19G is formed of only a flat bottom surface 1998 and a wall 19 ⁇ ⁇ 1, 19W2 or a wall 19W2, and a taper surface 19T exists in the groove 19G. If not, a backup ring 13 is used to set the 0 ring 11 to the gap 20 S between the third hollow portion 73 of the housing portion 17 and the shaft portion 19. Although it is possible to prevent the deformed portion from protruding, the gap 20S cannot be reduced by using the above-described pressure difference.
- the gap 2 OS is reduced by the ring 11 pressed by the pressurized carbon dioxide gas and the pack-up ring 13 expanded in the ⁇ direction by the pressing of the ring 11 and the heating, or
- the seal surfaces S1, S2 and the support surface 13S, which have virtually disappeared, are almost completely adhered to each other.
- the permeation area of the carbon dioxide gas G that has passed through the O-ring 11 on the low pressure LS side is reduced as much as possible.
- the amount of leakage of carbon dioxide G to the low-pressure L S side can be minimized.
- connection device 1 As described above, in the connection device 1 according to the first embodiment, even when a rubber O-ring 1 ⁇ made of a material through which carbon dioxide gas is The first sealing effect is exerted by the deformed O-ring 11, and further, the press-up of the O-ring 11 moves the pack-up ring 13 on the tapered surface 19 T, and furthermore, the knock-up ring 13 Due to the second sealing effect due to the elastic deformation expanding in the ⁇ direction, the surfaces S 1 and S 2 to be sealed are closed so that the carbon dioxide gas does not pass therethrough.
- the back-up ring 13 is formed of a material that does not allow the transmission of carbon dioxide gas
- the back-up ring 13 and the inner wall of the third hollow portion 73 of the housing portion 17 are located on the low-pressure LS side after the groove 19 G.
- the amount of carbon dioxide gas leaking to the outside of the connecting members 7 and 9 through the clearance (clearance) 20 between the shaft portion 19 and the connecting members 7 and 9 can be extremely reduced or prevented.
- the pressurized carbon dioxide gas as the refrigerant is not only pressurized but also usually heated to, for example, 40 to 80. Therefore, the pack-up ring 13 is also heated and easily deformed, and the above-mentioned elastic deformation proceeds, and the adhesion to the first sealed surface S1 and the second sealed surface S2 is further enhanced. As a result, it is estimated that the sealing effect of the backup ring 13 is further promoted.
- connection device of the present embodiment is simple, and a versatile O-ring can be used, so that an increase in cost can be suppressed.
- the first embodiment has exemplified the case where the groove 9G is formed on the shaft portion 19 side.
- Grooves can also be configured.
- the first half groove 19 G1 formed in the shaft portion 19a has a flat bottom surface 19B and a tapered surface; I 9 T, and walls 19W1 1 and 1921.
- the bottom surface 19B and the tapered surface 19T are the same as those in the groove 19G illustrated in FIG. 2, but the height of the walls 19W1 1 and 19W2 1 is the same as that of the wall 19W1 illustrated in FIG. ] Lower than 9W2, for example, about half lower. That is, the depth of the first half groove 19G ⁇ is, for example, about half as shallow as the depth of the groove 19G.
- the second half groove 17G1 is formed on the inner wall of the housing portion ⁇ 7a, and the second half groove 17G1 is formed with the wall 1 having the same height as the walls 19W1 1 and 19W2 1. , Bottom 17B.
- the first half groove 19G1 and the As shown in FIG. 5A the two half grooves 17 G 1 have the same axial position as the groove shown in FIG. 5A, and substantially the same groove as the groove 19 G shown in FIG. 2 is defined.
- the backup ring 13 and the 0 ring 11 are mounted in advance.
- the second half groove 17G2 is formed on the inner wall of the housing part 17b, and the second half groove ;! 7G 2 has a wall 17W of the same depth (height) as the wall 19 "W11, 1921 in Fig. 5B, a tapered surface 17T which is the same as the tapered surface 19T, and a bottom surface.
- the groove formed in the shaft portion 19b] 9G1 is the same as that in Fig. 5 A.
- the shaft portion 1 is formed in the third hollow portion 73 of the housing portion 17B.
- the same groove as the illustrated groove ⁇ 9G is specified
- the backup ring 13 and the 0 ring 11 are mounted on the first half groove 9G 1 of the shaft portion 19 ⁇ in advance.
- the second half groove 17G 2 illustrated in B has a tapered surface 17 T formed in the second half groove 17 G 2
- the peripheral green portion in contact with the tapered surface 17 T of the backup ring 13 is illustrated in FIGS. 2 and 3 A. Not a flat surface as described above, but a surface that is in contact with the tapered surface 19 T , Use those inclined.
- the groove corresponding to the groove ⁇ 9G is either the shaft portion 19 or the housing portion 17, or the shaft portions 19 a and 19 b and the housing portion 17 1 7a and 17b.
- the gas permeation area is an area of the surface area of the seal member in which gas permeating the inside of the seal member can go out of the seal member.
- Type of gas, pressure P, temperature T, and gas permeability coefficient of the sealing member ⁇ If the shape of the gas-permeable part is determined, the gas leakage amount GL can be estimated by the following equation (II).
- GL (Graol / k) xP 0 x (txS xP (Pa) / D) where GL is the amount of gas leakage (g),
- Graol is the molecular weight of the gas (g / fflol),
- Po is the gas permeation coefficient when pressure P (Pa) and humidity T are constant, t is the permeation time (sec),
- P (Pa) is the pressure at that time
- D is the transmission distance (era).
- STP in Eq. (1) represents the standard condition (temperature 0 ° C, latin).
- gas permeability coefficient P. I is a coefficient indicating the gas permeation characteristics of the sealing member, which is unitized by the following equation (2).
- 6A to 6C are schematic configuration diagrams of main parts of a gas permeability measuring device used for measuring a carbon dioxide gas permeation amount.
- the gas permeability measurement device As shown in Figure 6A, has an upper cell 3 1 And a lower cell 32.
- the inner peripheral surface of the connection portion has a circular shape with an inner diameter R1.
- the size of the inner diameter R1 was set to 7 O mm.
- the upper cell 31 is connected to a test gas supply (not shown) and has an inlet 31a into which carbon dioxide G as a test gas is introduced.
- the lower cell 32 is connected to a pressure detector (not shown) and has an outlet 32 a through which the carbon dioxide G that has passed through the test piece 35 is led out.
- the test piece 35 is mounted between the upper cell 31 and the lower cell 32 so as to seal between the upper cell 31 and the lower cell 32.
- test piece 35 a butyl rubber sheet was used as the test piece 35 .
- the thickness of the small rubber sheet 35 was, for example, 0.3 mm.
- Fig. 6B shows the configuration shown in Fig. 6A, with an opening of diameter R2 formed at the center.
- the aluminum plate 37 is placed on the upper cell 31 side of the rubber sheet 35, and both the aluminum plate 37 and the rubber sheet 35 are sandwiched between the upper cell 31 and the lower cell 32. Is shown.
- the aluminum plate 37 is arranged on the surface of the lower cell 32 side of the butyl rubber sheet 35, and both the aluminum plate 37 and the butyl rubber sheet 35 are sandwiched between the upper cell 31 and the lower cell 32. Shows the case.
- the diameter R2 of the aperture of the aluminum plate 37 is 1 Omm in both cases of Figs.
- the permeation cell 30 was evacuated to a vacuum, and then carbon dioxide G at 70 ° C was introduced into the upper cell 31 at about 10 13 25 Pa (1 atm), and the lower cell 32 was introduced. The amount of carbon dioxide G permeated was measured.
- the permeation amount was 2.3 cm 3 ⁇ band / 24h ⁇ 101325 Pa per lmm of the thickness of the rubber sheet 35.
- the transmission amount was the same as that of Fig. 6A, 2.3 era 5 -mm / 24h10 13 25 Pa.
- connection device 1 not the flat bottom surface 19 B, but the tapered surface that acts the same as the aluminum plate 37
- the surface 20 of the 0 ring 11 is made as small as possible by reducing the gap 20 S at the 19 T portion be able to. That is, it can be seen that reducing the gap 2 OS is effective for preventing leakage of carbon dioxide gas to the outside of the connection members 7 and 9 through the ring 11 and the back-up ring 13.
- O-ring 1 As a single unit, pressurized gas flows through the first piping 3 and the second piping 5 while keeping the inside and outside of the connecting device 1 confidential when the inside of the connecting device ⁇ is at atmospheric pressure. To prevent the pressurized gas from leaking to some extent when the inside of the connection equipment 1 is in a high pressure state.
- the backup ring ⁇ 3 may be away from the inner wall of the housing part 17 at atmospheric pressure and the contact with the tapered surface 19T is weak, so there is no guarantee that the confidential state can be maintained. .
- the pressurized carbon dioxide gas sealing effect on the O-ring 11 itself is significantly increased.
- the combination of the ring 11 and the backup ring 13 produces a synergistic effect as a gas sealing means.
- FIGS. 7A and 7B are partially enlarged views showing the main part of the connection device 1 as in the illustration of FIG.
- the same components as those shown in FIG. 2 are denoted by the same reference numerals, and detailed description is omitted.
- illustration of the ring 11 is omitted in FIGS. 7A and 7B.
- Fig. 7A shows a state in which the backup ring 13 is attached to the groove 19G of the shaft part 19 in a state where the backup ring 13 is not pressed by the ring 11 in a state where the carbon dioxide gas does not flow at room temperature and the backup ring 13 is not pressed by the ring 11. I have.
- the back-up ring 13 is formed so that the outer diameter of the back-up ring 3 mounted on the lower part of the tapered surface 19 T away from the wall 19W2 does not contact the inner diameter of the housing section 7. Further, as described above, the inner peripheral side of the backup ring 13 that contacts the tapered surface 19T has the same inclination as the inclination of the tapered surface 19T, and forms an annular tapered surface ⁇ 3T. deep.
- a pack-up ring 13 having a tapered surface 13T having the same inclination as the tapered surface 19T is mounted on the tapered surface ⁇ 9T of the groove 19G.
- ⁇ Ring 1 does not pressurize the backup ring 13 to the right along the tapered surface 19 T.
- the surfaces S 1 and S 2 to be sealed and the backup ring 13 are supported.
- the backup ring 13 When the carbon dioxide gas flows, the backup ring 13 is pressed to the right through a 0 ring (not shown) from the high pressure HS side inside the connection device 1 to the low pressure LS side communicating with the outside of the connection device 1. As a result, as shown in FIG. 7B, the backup ring 13 moves to the third side (toward the wall 19W2) with low pressure on the tapered surface 19, and the peripheral portion of the pack-up ring 13 Contact the inner wall of part 17. In some cases, the pack-up ring ⁇ 3 abuts the wall 19W2.
- the movement of the inner wall of the housing part 17 and the tapered surface 19 T suppresses the movement of the housing, so that the packing ring 13 expands in the radial direction as the packing ring 13 moves toward the low-pressure LS side, and the packing increases.
- the outer diameter of the ring 13 increases, and the gap 2 OS decreases (narrows).
- the wall 19W2 also has an effect of suppressing the movement of the backup ring 13.
- the inclination of the taper surface 9 T of 9G and the taper surface 13 T of the backup ring 13 are the same, and there is a gap 20 S in a state where carbon dioxide gas is not flowed.
- the pressing force of the 0 ring 1 1 due to the deformation of the 0 ring 1 1 due to the pressing force from the carbon dioxide gas is mainly used to increase the diameter of the packing ring 13.
- the gap 2 OS narrows, but the pressurized carbon dioxide gas is sufficiently sealed between the surfaces S 1 and S 2 as the backup ring 13 moves to the low pressure LS side.
- the stress that compresses the back-up ring 13 is hardly generated.
- FIG. 7A The relationship between the tapered surface 19 T between the surfaces S 1 and S 2 to be sealed and the ring-shaped tapered surface 13 T of the backup ring 13 is shown in FIG. 7A.
- Form 3 Also, for example, at room temperature, 6.5 MPa of carbon dioxide gas is supplied to the high-pressure HS side.
- the gap 2 OS when the distance between the surfaces S 1 and S 2 to be sealed and the support surface 13 S of the back-up ring 13 is narrowed is 0.99.
- X 1 0- 3 it was mm. If a gap 2 OS having such a size exists, leakage of carbon dioxide gas occurs.
- the inclination of the tapered surface 19 T and the ring-shaped tapered surface 13 T is simply made equal.
- the gap 2 OS cannot be as close to zero as possible.
- a pack coupling having the configuration shown in FIGS. 8A and 8B and the sealed surfaces S 1 and S 2 are used.
- FIGS. 8A and 8B are partially enlarged views showing the main part of the connection device 1 as in the illustrations of FIGS. 7A and 7B.
- FIG. 8A shows a state in which no carbon dioxide gas flows, and FIG. The gas shows the pressed-up ring pressed down. However, in FIGS. 8A and 8B, the ring 1] is not shown.
- the backup ring 13e shown in FIGS. 8A and 8B has a tapered surface in contact with the tapered surface 19T.
- the inclination of the tapered surface is equal to the ring surface of the backup ring 13 shown in FIGS. 7A and 7B. different.
- FIGS. 8A and 8B The components other than the pack-up ring 13 e shown in FIGS. 8A and 8B are the same as the components shown in FIGS. 2 and 7A and 7B, and thus the same components are denoted by the same reference numerals and detailed description. Is omitted.
- the inner diameter of the backup ring 13e in contact with the tapered surface 19 "of the groove 19G has a smaller inner diameter Rd2 on the low-pressure LS side than the inner diameter Rd1 on the high-pressure HS side.
- the pressurized carbon dioxide gas does not flow, the end on the high pressure HS side is in contact with the tapered surface 19T, and the end on the low pressure LS side is not in contact with the tapered surface 19T. That is, the inclination of the tapered surface 13Te is set to be larger than the inclination of the tapered surface 19T of the surface S2 to be sealed.
- the inner circumferential side of the pack-up ring 13e that contacts the tapered surface 19T has a low pressure LS from the high pressure HS side.
- a gap that spreads out toward the side occurs.
- the tapered surface 13D at the high-pressure HS side of the back-up ring 13e at the high pressure HS side of 13e is pressed by the pressurized carbon dioxide gas to the back-up ring 13e to the low-pressure LS side. It becomes a “crushing allowance” that collapses as you move.
- the pack-up ring 13 e When the pressurized carbon dioxide gas flows, the pack-up ring 13 e is pressed from the high-pressure HS side toward the low-pressure LS side and moves to the low-pressure LS side as shown in FIG. 8B.
- This pa By moving the pickup ring 13 e to the low pressure LS side, the inner wall of the nozzle part 7 illustrated in FIG. 8B and the tapered surface 19 T come into contact with each other, and the regions 13 A 1 and 13 A 2 A compressive stress is partially applied to the high pressure side of the backup ring 13 e.
- the backup ring 1 3e adheres more strongly to the surfaces S ⁇ and S2 to be sealed than the backup ring 13 shown in Fig. 7B. As a result, the gap 20S can be made as small as possible.
- a press-up margin 13D is provided on the high-pressure HS side with 46 nylon to form a pack-up ring 13e, and the backup ring in Fig. 7A]
- 6.5 MPa of carbon dioxide gas was flowed to the high pressure HS side.
- the gap 20 S on the high pressure HS side was so small that it could not be measured, and the leakage of carbon dioxide gas to the S side was reduced as much as possible under low pressure.
- the taper surface 13 T e of the groove 13 G By making the inclination larger than the inclination angle of the tapered surface 19T, the end on the high pressure side of the knock-up ring ⁇ 3e is partially compressed in the axial direction with the movement to the low pressure LS side.
- the backup ring 13 e between the surfaces S 1 to be sealed and the surface S to be sealed By compressing the backup ring 13 e between the surfaces S 1 to be sealed and the surface S to be sealed, the compressed portion of the backup ring 13 e expands in the radial direction, and the surface to be sealed S ⁇ ] , Strongly adheres to S2.
- FIGS. 8A and 8B show an example in which a crush allowance 13 D is provided on the inner diameter side of the pack-up ring 13 e that is in contact with the tapered surface 19 T. It is also possible to provide a “crush allowance” on the outer peripheral side of the backup ring 13 e in contact with the third hollow portion 73. As described above, it is possible to suppress gas leakage by providing the crushing L portion J at least on either the inner circumferential side or the outer circumferential side of the back-up ring, but it is possible to suppress gas leakage. If a “brush allowance” is provided for both of them, the amount of gas leakage can be further reduced.
- the inclinations of the tapered surface 13 Te and the tapered surface 19 T are determined so that a partial compression occurs in the pack-up ring 13 e on the high pressure HS side.
- the backup ring 13e can be uniformly compressed along the axial direction DAL of the shaft part 19. .
- the backup ring 13 can maintain a confidential state in the low pressure state, but in the high pressure state, the diameter increases between the tapered surface 19 T and the inner wall of the housing portion 17, Seal the first sealed surface S 1 and the second sealed surface S 2, and prevent leakage of pressurized carbon dioxide gas in addition to the gas seal of the ring 11.
- the ⁇ ring 11 as the first gas seal member, the back-up ring 13 as the second gas seal member, the tapered surface 19 T and the area defined on the inner surface of the housing portion 17 Work together to significantly increase the confidentiality of the connecting device 1.
- the O-ring 11 as the first gas seal member and the backup ring 13 as the second gas seal member have different roles independently and their materials are different, but the tapered surface 19 T Under the existence of, the combination of the O-ring 11 and the backup ring 13 provides a synergistic effect as a gas sealing means.
- FIGS. 9A and 9B A second embodiment of the present invention will be described with reference to FIGS. 9A and 9B.
- FIG. 9A is a cross-sectional view showing a connection device 50 according to the second embodiment of the present invention.
- FIG. 9B is a partially enlarged view of FIG. 9A.
- connection device 1 has a cylindrical surface seal structure for sealing a clearance (gap) between the cylindrical surface of the housing portion 17 and the cylindrical surface of the shaft portion 19.
- connection device 50 of the second embodiment uses a first connection member 47 instead of the first connection member 7 in the first embodiment, and a second connection member 49 instead of the second connection member 9.
- a pack-up ring 53 is used in place of the pack-up ring 13.
- the same ring as that of the connection device 1 shall be used for the ring. It should be noted that, depending on the type of gas flowing into the connection device 50 and the shape of the sealing portion of the connection member, a ⁇ ring different from the 0 ring 11 may be used.
- connection member 47 connected to the pipe 3 and a connection member 49 connected to the pipe 5 are connected to each other, and pressurized carbon dioxide gas flows through a flow path inside the connection device 50.
- the functions of the members 47 and 49 are the same as those of the first embodiment.
- the first pipe 3 is fitted into the first hollow portion 47 1 of the connection member 47, and the end outer surface C L1 is connected by, for example, welding.
- the second pipe 5 is fitted in the third hollow portion 492 of the connection member 49, and the end outer surface CL2 is connected, for example, by welding.
- the connecting member 47 is provided with a first flange portion 57
- the connecting member 49 is provided with a second flange portion 59.
- the flange portion 57 and the flange portion 59 are provided so as to face each other when the connecting member 47 and the connecting member 49 are connected.
- the connecting member 47 is provided with a second hollow portion 472 which communicates with the surface of the flange portion 47 and the first hollow portion 471, and the connecting member 49 has the surface of the flange portion 49 and the third hollow portion 472.
- a fourth hollow portion 492 communicating with the hollow portion 491 is provided.
- a groove 57 G and a tapered surface 57 T are formed in the flange portion 57 of the connection member 47.
- the tapered surface 57 T is continuous from the flat bottom surface 57 B of the groove 57 G like the tapered surface 19 T in the case of the first embodiment, and is connected to the outside of the connection member 47 and the connection member 49.
- the groove is formed so as to be shallower toward the low pressure LS side.
- a ring 11 is attached to the bottom 57B of the groove 57G.
- the connecting device 50 when the connecting member 47 and the connecting member 49 are connected by connecting the surface of the flange portion 47 and the surface of the flange portion 49,
- the bottom face 57 B of the groove 57 G is the first sealed face S l
- the face 59 S of the flange portion 59 facing the bottom face is the second sealed face S 2, and these sealed faces are provided. Seal between faces.
- the backup ring 53 is preferably formed in a complete ring shape because the flange portion 57 can be easily mounted in the groove 57G.
- the pack-up ring 53 is arranged so that the outer periphery of the O-ring 11 is supported by the support surface that is the inner peripheral surface in the groove 57 G. Therefore, the backup ring 5 3 Is arranged on the lower pressure side than the ring 11 as illustrated in FIG. 9B.
- the backup ring 53 is formed of the same resin or polymer material that does not easily transmit carbon dioxide gas as the material described as the material of the backup ring 3 used in the first embodiment.
- Matching taper surface or taper surface has a taper surface with an inclination greater than the inclination of 57 T.
- the tapered surface of the pack-up ring 13 is more inclined than the inclination of the taper surface 57 T
- the advantage of having a large slope is as described above with reference to FIGS. 8A and 8B.
- the high-pressure HS inside the connecting members 47 and 49 is used as in the case of the first embodiment.
- the O-ring 11 is pressed against the low pressure LS side due to the pressure difference between the pressure side and the external low pressure LS side.
- the backup ring 53 pressed by the ring 11 via the support surface of the backup ring 53 moves to the low pressure LS side, and the tapered surface 57 T causes the groove 57 G and the flange portion to move.
- the elastic deformation occurs so that the gap between the surface to be sealed and the support surface is narrowed.
- a groove 57G can be formed in one flange 57 but also a groove similar to the groove 57G can be formed in the other flange 59. Further, also in the second embodiment, as illustrated with reference to FIGS. 5A and 5B, a half groove is formed in both flange portions 57 and 59, and both flange portions 57 and 59 are formed. When combined, it is also possible to form a groove equivalent to the above groove 57G o
- the shape of the connection member can be made simpler than in the case of the first embodiment, which leads to cost reduction. An effect can also be obtained.
- FIG. 10 A third embodiment of the present invention will be described with reference to FIG. 10 and FIG.
- FIG. 10 is a cross-sectional view showing a connecting device and a sealing device according to a third embodiment of the present invention, and FIG. 10 is a schematic partial enlarged view of a main part thereof.
- connection device 100 is a connection device for preventing the leakage of carbon dioxide gas with only the ring 11 without using the backup ring as in the first and second embodiments. .
- connection device 100 does not have a knock-up ring, and the shapes of the connection member 107 and the connection member 109 as the first and second connection members of the present invention are different from those of the first embodiment. Is different. The rest of the configuration is the same as in the first embodiment, and a detailed description thereof will be omitted.
- connection member 107 and the connection member 09 are provided with a first contact surface AS # and a second contact surface AS2 that come into contact with each other when they are connected to each other.
- the first contact surface AS ⁇ of the connection member 107 is provided as a surface facing the connection member 109 at the tip of the housing portion 17.
- the second contact surface AS2 of the connecting member 109 is a surface serving as a base on which the shaft portion 19 is provided.
- the inner wall corner at the tip of the housing part 117 is chamfered so that, for example, the cross-sectional shape of the groove 20 becomes a triangle shape that becomes narrower toward the contact surfaces AS 1 and AS 2 (notched. ing).
- the contact surface AS 1 The inner wall corner of the tip of the housing part 117 of the connecting member 107 is chamfered (notched) so that the groove 120 of the second part continuous with AS 2 is formed.
- the front end of the housing portion 117 is notched, and a triangular section for accommodating the O-ring 11 is defined as a groove of the first portion.
- the chamfered surface (notched surface) of the housing part # 7 becomes the sealed surface S10 of the connecting member 107. Also, two surfaces other than the sealed surface S10 of the groove 120 having a triangular cross section become the sealed surfaces S20 of the connecting members 1-9.
- the ring 11 seals between the sealed surface S10 of the connecting member 107 and the sealed surface S20 of the connecting member 109.
- the groove 120 presses the ring 11 by the surface S 10 to be sealed and the surface S 20 to be sealed, and the pressure of the gas acts on the ring 11 so that the contact surface AS 1 , AS 2 and the surface to be sealed S]
- the O-ring 11 elastically deforms so as to fill the gap between 0 and S 20.
- the gas permeation area of the O-ring 11 on the low pressure LS side becomes extremely small, and, in addition to the gas permeation prevention function of the ring 11 itself, the amount of carbon dioxide gas leakage can be significantly reduced.
- the amount of pressurized carbon dioxide gas leaking to the low-pressure LS side can be minimized.
- the third embodiment does not require a backup ring, the leakage of carbon dioxide can be prevented more easily and easily than in the above-described embodiment. Further, the cost of the connection device is further reduced as compared with the embodiment described above. Fourth embodiment
- FIG. 12 is a sectional view showing a connecting device and a sealing device according to a fourth embodiment of the present invention.
- connection device 150 is a connection device that seals using a flat plate-shaped sealing member ⁇ 5 ⁇ instead of an O-ring as a sealing member.
- connection device 150 has a first connection member 157, a second connection member 490 that is the same as the connection member used in the second embodiment, and a flat sealing member 155. I have. Since the other components are the same as those of the second embodiment, detailed description will be omitted.
- the first pipe 3 is fitted in the first hollow portion 157 1 and connected to the connecting member 157.
- the second pipe 5 is fitted into the third hollow portion 491, and is connected to the connection member 49.
- the connecting member ⁇ 57 and the connecting member 49 have a first sealed surface S 30 and a second sealed surface S 40 that face each other when connected to each other.
- the surfaces S 30 and S 40 to be sealed are flat.
- connection members ⁇ 57 and the connection members 49 are made of a material that does not allow the permeation of carbon gas or a material that is difficult to permeate, similarly to the connection members 7 and 9 in the first embodiment.
- the sealing member 15 1 has the same diameter as the second hollow portion 1 57 2 and the fourth hollow portion 49 2, and communicates the second hollow portion 1 57 2 with the fourth hollow portion 49 2. It is formed in a thin flat plate having an opening portion 151a for flowing carbon dioxide gas, and is composed of a resin sheet or a metal gasket with rubber coated on both sides. Flat plate-shaped sealing member] 51 The flat surface on both sides of 1 is the sealing surface.
- the same polyacrylonitrile resin, Alcohol resins, polyamide resins, polyvinyl fluoride resins, high-density polyethylene resins, polystyrene resins, PEEK resins, PPS resins, LCP resins, and polyimide resins can be used.
- the sealing member 15 1 may be formed of a synthetic polymer material such as Nylon or the like which is difficult to pass gas.
- the flat seal member 15 1 is defined in the second hollow portion 1 57 2 and the fourth hollow portion 49 2 when the pipes 3 and 5 are connected to the connecting member ⁇ 57 and the connecting member 49.
- the openings 15a are communicated with the flow paths 7a and 9a, and are sandwiched between the connecting members ⁇ 57 and 49.
- the seal on the low-pressure LS side outside the connecting members 157, 49 (connecting device 150) is formed.
- the gas permeation area of the metal member 15 1 is reduced. Also, the gas transmission distance from the high-pressure HS side inside the connecting members ⁇ 57 and 49 to the low-pressure LS side outside the connecting device 150 through the inside of the sealing member 15 become longer.
- the diameter of the fitting can be reduced by reducing the diameter of the phosphorus, thereby reducing the gas permeation area.
- the gas permeation area can be reduced by reducing the ring diameter, but it is difficult to reduce the fitting diameter to a certain value or less.
- the transmission area can also be reduced by reducing the wire diameter (cross-sectional diameter) of the 0 ring, but if the wire diameter is too small, the minimum It will be difficult to secure a limited “killing allowance”. But Therefore, the diameter of the ring cannot be reduced below a certain level. ⁇ Reducing the diameter of the ring leads to a shorter gas permeation distance, which has the disadvantage of increasing gas leakage.
- the sealing member 15 1 in a flat plate shape, the above disadvantages can be solved, and the leakage of carbon dioxide gas to the low pressure LS side can be significantly reduced.
- connection device and the seal member are simple, and the seal member can be made of the same material as the 'ring'. And the effect of cost reduction can be obtained.
- the connection device 200 shown in FIG. 13 is a combination of the first embodiment and the third embodiment.
- the connecting device 200 uses the second ⁇ ring 11 of the first embodiment, the knock-up ring 13, and the second ⁇ ring 110 of the third embodiment. . That is, the past two O-rings and the knock-up ring 13 are used.
- the leakage of the pressurized carbon dioxide gas is extremely reduced due to the synergistic effect.
- a connection device 250 shown in FIG. 14 is a combination of the first embodiment and the fourth embodiment. However, instead of the sealing member 15 1 in FIG. 12, the end face of the root of the shaft portion 19 of the second connecting member 9 and the end face of the tip of the housing portion 17 of the first connecting member 7 are replaced. A flat seal member 25 1 is used. The portions of the O-ring 11 and the back-up ring 13 are the same as in the third embodiment.
- connection device 350 shown in FIG. 15 combines the second embodiment with the first embodiment. It is something. However, the second embodiment is applied to the end face of the housing part 17 and the end face of the main body part 70.
- a flat plate-like sealing member 25 1 is provided between the end face of the root of the shaft 19 of the second connecting member 9 illustrated in FIG. 14 and the end face of the tip of the housing 17 of the first connecting member 7.
- the second embodiment described with reference to FIGS. 9A and 9B can be applied. As described above, by variously combining the embodiments of the present invention, a higher sealing effect can be obtained without requiring any other special device or structure.
- the connecting device of the present invention is applied to a connecting portion of a pipe. It is also possible to apply the present invention to a seal between other contacting members.
- the cross-sectional shape of the O-ring 351 may be triangular in accordance with the triangular cross-sectional shape of the groove 120.
- the shape of the mold 20 is not limited to a triangular shape in cross section, but may be any shape as long as the gas permeation area on the low pressure side of the seal member is small.
- the fact that the shape of the groove can be changed also applies to the connection device 200 shown in FIG.
- connection device 200 and the connection device 250 can be obtained. It is possible to obtain better sealability than the form using the seal member Will be possible. This can save the trouble of forming the groove 120 and mounting the sealing member 251, and can prevent the structures of the sealing device and the connecting device from becoming complicated.
- the shape of the gap narrowing means of the present invention is not limited to the tapered surface such as the tapered face 19 of the groove 19 G of the shaft portion 19, and the position where the gap narrowing means is provided is not limited to the shaft portion. ⁇ Not limited to 9.
- the tapered surface may be provided on the housing part 17, and the shape and arrangement of the narrowing means are arbitrary as long as the gap between the surface to be sealed and the backup ring can be narrowed.
- connection device is used not only for connection of piping through which pressurized / heated carbon dioxide gas flows in a cooling device, but also for sealing other gases by appropriately selecting materials for a seal member and a backup ring. You can also.
- the pipe is simply and effectively sealed and connected using a general-purpose seal member. It is also possible to provide a connection device capable of being operated. Industrial applicability
- the connecting device (sealing device fi) of the present invention can be used for sealing various gases such as sealing (confidential) of a refrigerant in a cooling device.
- the connection device of the present invention has a low molecular weight and is suitable for sealing high-pressure gas.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10393981T DE10393981T5 (de) | 2002-12-27 | 2003-12-26 | Verbindervorrichtung |
US10/540,870 US20060232066A1 (en) | 2002-12-27 | 2003-12-26 | Connection device |
AU2003296164A AU2003296164A1 (en) | 2002-12-27 | 2003-12-26 | Connection device |
JP2005508510A JP3856152B2 (ja) | 2003-02-06 | 2003-12-26 | 炭酸ガス密封装置 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-382243 | 2002-12-27 | ||
JP2002382243 | 2002-12-27 | ||
JP2003029196 | 2003-02-06 | ||
JP2003-029196 | 2003-02-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004061353A1 true WO2004061353A1 (ja) | 2004-07-22 |
Family
ID=32716343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/017038 WO2004061353A1 (ja) | 2002-12-27 | 2003-12-26 | 接続装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060232066A1 (ja) |
AU (1) | AU2003296164A1 (ja) |
DE (1) | DE10393981T5 (ja) |
WO (1) | WO2004061353A1 (ja) |
Cited By (8)
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JP2006125708A (ja) * | 2004-10-28 | 2006-05-18 | T Rad Co Ltd | 熱交換器の連結構造 |
JPWO2006070568A1 (ja) * | 2004-12-28 | 2008-06-12 | Nok株式会社 | 密封装置 |
JP2008530476A (ja) * | 2005-02-15 | 2008-08-07 | レキット ベンキサー (ユーケイ) リミテッド | 圧力容器用のシール組立体 |
JP2009500580A (ja) * | 2005-07-07 | 2009-01-08 | マットソン テクノロジー インコーポレイテッド | 腐食バリヤを備えたシール装置及び方法 |
JP2010025161A (ja) * | 2008-07-16 | 2010-02-04 | Toshiba Corp | 気密設備・気密容器間の気密構造 |
JP2016109218A (ja) * | 2014-12-08 | 2016-06-20 | Nok株式会社 | 高圧ガス用シール構造 |
JPWO2021246085A1 (ja) * | 2020-06-05 | 2021-12-09 | ||
US11519529B2 (en) | 2017-05-31 | 2022-12-06 | Hanon Systems | Metal sealing threaded (tube-o) fitting |
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JP4805598B2 (ja) * | 2005-04-15 | 2011-11-02 | 日東工器株式会社 | 雌雄部材組立体 |
JP4877473B2 (ja) * | 2005-11-14 | 2012-02-15 | Nok株式会社 | 密封装置 |
JP4877474B2 (ja) * | 2005-11-14 | 2012-02-15 | Nok株式会社 | 炭酸ガスシール用密封装置 |
US7810816B1 (en) * | 2005-12-13 | 2010-10-12 | Horace P. Halling | Seal |
US7455050B2 (en) * | 2006-12-13 | 2008-11-25 | Delphi Technologies, Inc. | O-ring retainer for a fuel injector in a fuel rail socket |
US20090090417A1 (en) * | 2007-10-09 | 2009-04-09 | Mott Corporation | Sanitary replaceable fluid disbursement device for use in bioreactors |
US20090179388A1 (en) * | 2008-01-15 | 2009-07-16 | Uhlenkamp Brian J | Hygienic Coupling and Fitting Seal System |
US9447882B2 (en) * | 2008-04-17 | 2016-09-20 | Parker-Hannifin Corporation | Compression-limited gasket construction |
US9188262B2 (en) * | 2010-08-06 | 2015-11-17 | Steel Mains Pty Ltd | High pressure pipe joint |
JP6081095B2 (ja) * | 2012-07-17 | 2017-02-15 | Nok株式会社 | シール構造 |
DE102012108566B4 (de) * | 2012-09-13 | 2016-01-28 | Dionex Softron Gmbh | Steckereinheit und Verbindungseinrichtung für Flüssigkeit führende Komponenten, insbesondere für die Hochleistungsflüssigkeitschromatographie |
ITBO20130045A1 (it) * | 2013-01-31 | 2014-08-01 | For S P A | Raccordo per tubi flessibili |
CN105074297B (zh) * | 2013-02-18 | 2018-06-12 | Nok株式会社 | 密封结构 |
JP2015090210A (ja) * | 2013-11-07 | 2015-05-11 | Nok株式会社 | ガスケット及び密封構造 |
US20170211703A1 (en) * | 2014-05-29 | 2017-07-27 | Nok Corporation | Sealing structure and sealing device |
US10837582B1 (en) * | 2020-02-14 | 2020-11-17 | Trinity Bay Equipment Holdings, LLC | Wedged protrusion profile fitting seal systems and methods |
CN112229950A (zh) * | 2020-09-29 | 2021-01-15 | 广西梦科智联信息技术有限公司 | 一种流动式汽车检测装置 |
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- 2003-12-26 DE DE10393981T patent/DE10393981T5/de not_active Withdrawn
- 2003-12-26 AU AU2003296164A patent/AU2003296164A1/en not_active Abandoned
- 2003-12-26 US US10/540,870 patent/US20060232066A1/en not_active Abandoned
- 2003-12-26 WO PCT/JP2003/017038 patent/WO2004061353A1/ja active Application Filing
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JPS54106911A (en) * | 1978-02-08 | 1979-08-22 | Hitachi Ltd | Leakage preventive mechanism for companion flange part |
JPS61587U (ja) * | 1985-05-02 | 1986-01-06 | コスモ工機株式会社 | 管継ぎ手におけるパツキングの抜出し防止構造 |
JPS63128385U (ja) * | 1986-09-17 | 1988-08-22 | ||
JPH0579183U (ja) * | 1992-03-31 | 1993-10-26 | 日本酸素株式会社 | 接続管 |
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JPH1172162A (ja) * | 1997-06-27 | 1999-03-16 | Nok Corp | 密封装置 |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006125708A (ja) * | 2004-10-28 | 2006-05-18 | T Rad Co Ltd | 熱交換器の連結構造 |
JPWO2006070568A1 (ja) * | 2004-12-28 | 2008-06-12 | Nok株式会社 | 密封装置 |
JP4636281B2 (ja) * | 2004-12-28 | 2011-02-23 | Nok株式会社 | 密封装置 |
JP2008530476A (ja) * | 2005-02-15 | 2008-08-07 | レキット ベンキサー (ユーケイ) リミテッド | 圧力容器用のシール組立体 |
JP2009500580A (ja) * | 2005-07-07 | 2009-01-08 | マットソン テクノロジー インコーポレイテッド | 腐食バリヤを備えたシール装置及び方法 |
JP2010025161A (ja) * | 2008-07-16 | 2010-02-04 | Toshiba Corp | 気密設備・気密容器間の気密構造 |
JP2016109218A (ja) * | 2014-12-08 | 2016-06-20 | Nok株式会社 | 高圧ガス用シール構造 |
US11519529B2 (en) | 2017-05-31 | 2022-12-06 | Hanon Systems | Metal sealing threaded (tube-o) fitting |
JPWO2021246085A1 (ja) * | 2020-06-05 | 2021-12-09 | ||
WO2021246085A1 (ja) * | 2020-06-05 | 2021-12-09 | Nok株式会社 | 密封構造 |
JP7338060B2 (ja) | 2020-06-05 | 2023-09-04 | Nok株式会社 | 密封構造 |
Also Published As
Publication number | Publication date |
---|---|
AU2003296164A8 (en) | 2004-07-29 |
DE10393981T5 (de) | 2005-11-10 |
AU2003296164A1 (en) | 2004-07-29 |
US20060232066A1 (en) | 2006-10-19 |
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