JP6069413B2 - Base structure of composite container and composite container - Google Patents

Description

  In the present invention, the housing body and the mouth provided for filling the gas to the housing body or taking out from the housing body are integrally formed of a synthetic resin, and filament winding is formed around the housing body. The present invention relates to an applied composite container and a base structure provided at a mouth portion thereof.

  Conventionally, as shown in Patent Document 1, a composite container in which the outer surface of a synthetic resin container body is reinforced (reinforced by applying filament winding) has been proposed. In the composite container described in Patent Document 1, the container main body is formed with a mouth for filling the liquefied gas into the container main body or taking out from the container main body. A mouthpiece is provided with a mouthpiece. The base is insert-molded in the container body.

Japanese Patent Application Laid-Open No. 08-303693

  However, in the composite container of Patent Document 1, since the base is simply insert-molded in the container body, the contact portion between the container body and the base is in a state where the liquefied gas is filled in the container body. Therefore, it is pointed out that gas tends to leak as a gas.

  In view of the above problems, an object of the present invention is to provide a base structure for a composite container that can reliably suppress gas leakage, and a composite container.

In the present invention, the housing body and the cylindrical mouth provided so as to protrude from the housing body so as to fill or take out the liquefied gas from the housing body are integrally formed of synthetic resin. And a base structure provided in the mouth portion of the composite container reinforced around the housing body, the metal inner annular member being insert-molded on the inner side of the mouth portion, and an outer side of the mouth portion. An outer annular member that is fitted, and the inner annular member includes a first opposing flange that projects radially outward on the protruding end face side of the mouth, and the outer annular member is first in the axial direction of the mouth. With a second opposing collar that opposes the opposing collar, a male screw member that is fitted to the outer peripheral surface of the proximal end of the mouth, and in a state where the first opposing collar is in contact with the protruding end face of the mouth, by screwing the outer annular member to the male screw member, the elastic varying between the first opposing flange portions and the second opposing flange portion First annular sealing member that can be clamped, comprising a first seal portion, the contact surface between the inner circumferential surface of the outer peripheral surface and the outer annular member of the mouth is characterized by having a tapered seal portion.

In the above configuration, when the liquefied gas filled in the housing barrel leaks through the contact portion between the mouth portion of the composite container and the inner annular member, the gas is discharged from the inner annular member at the first seal portion. Sealed by a first annular seal member sandwiched in the axial direction of the mouth between the first opposing collar and the second opposing collar of the outer annular member. Moreover, in the said structure, gas is sealed by the taper seal part.

  In the mouthpiece structure of the composite container of the present invention, the outer annular member includes a contact portion that contacts the shoulder surface of the housing body portion that is continuous with the base end of the mouth portion in the axial direction of the mouth portion. The structure provided with the 2nd seal part by which the 2nd cyclic | annular seal member which can be elastically deformed between shoulder surfaces is clamped is employable.

  In the above configuration, when the liquefied gas filled in the housing barrel leaks through the contact portion between the mouth portion of the composite container and the inner annular member, the gas is stored in the housing barrel in the second seal portion. Sealing is performed by a second annular seal member sandwiched between the shoulder surface and the contact portion of the outer annular member in the axial direction of the mouth.

  In the mouthpiece structure of the composite container of the present invention, the outer annular member has an annular hem that spreads outward from the abutting portion and abuts against the shoulder surface of the housing barrel in the axial direction of the mouth, Can adopt a configuration provided with a shoulder seal portion pressed against the shoulder surface by filament winding.

  As in the above-described configuration, the sealing performance is improved by the filament winding so that the skirt portion of the outer annular member is pressed against the shoulder surface of the housing body.

  In the composite container of the present invention, the container body and the cylindrical mouth provided so as to protrude from the container body so as to fill or take out the liquefied gas from the container body are integrally made of synthetic resin. It is formed, filament winding is performed around the housing body, and the base structure described above is provided.

  According to the composite container having the above configuration, when the liquefied gas filled in the housing barrel leaks through the contact portion between the mouth portion of the composite container and the inner annular member, the gas is at least one of them. Sealed at one seal.

  According to the base structure of the composite container of the present invention, the gas transmitted through the contact portion between the mouth part of the composite container and the inner annular member is transferred to the first opposing flange of the inner annular member and the second opposing flange of the outer annular member. Gas leakage can be reliably suppressed by sealing with a first annular seal member sandwiched between the portions in the axial direction of the mouth portion. Moreover, according to the composite container of this invention, gas leak can be suppressed reliably.

It is sectional drawing of the container main body and winding in the composite container which concerns on one Embodiment of this invention. It is sectional drawing before fastening an outer side annular member to an inner side annular member in the same nozzle | cap | die structure. It is sectional drawing after tightening an outer side annular member to an inner side annular member in the metal structure. It is a single-part sectional view of the outside annular member of the metal structure. It is a single-piece | unit top view of the outer side annular member of the metal structure.

  Hereinafter, a base structure of a composite container according to an embodiment of the present invention will be described with reference to the drawings. First, the composite container 1 will be described with reference to FIG. The composite container 1 is filled with liquefied gas (LPG). The composite container 1 includes a container body 2 made of synthetic resin and filament winding (hereinafter simply referred to as “winding”) which is a reinforcing member provided on the outer peripheral surface of the housing body 3 of the container body 2.

  The container body 2 includes a housing body 3 and a mouth 4. The accommodating cylinder 3 accommodates the liquefied gas, and the opening 4 is a part for filling the accommodating cylinder 3 with gas or taking out the gas from the accommodating cylinder 3. The housing body 3 and the mouth 4 are integrally formed of high-density polyethylene. The container body 2 is housed in an exterior body (casing) 9.

  The housing body 3 includes a cylindrical portion 5 having an axial direction as a longitudinal direction, an end-side closing portion 6 that closes one end side (bottom side) of the cylindrical portion 5, and the other end side (top) of the cylindrical portion 5. And the other end side closing portion 7 that closes the other side. A portion where the cylindrical portion 5 and the one end side blocking portion 6 are continuous is formed in a conical shape, and a portion where the other end side blocking portion 7 of the cylindrical portion 5 is continuous is formed in a conical shape.

  A positioning protrusion 8 is formed at the center of the one end side blocking portion 6. The positioning protrusion 8 is a portion that supports the container body 2 at the center when the container body 2 is wound. The mouth portion 4 is formed at the center of the other end side blocking portion 7. The mouth portion 4 protrudes from the other end side closing portion 7 along the axial direction L of the housing body portion 3 and is formed in a cylindrical shape. At least a part of the outer peripheral surface of the mouth part 4 (in this case, only the middle part in the axial direction L) is formed with a mouth taper surface 28 that gradually expands toward the base end side (accommodating body part 3 side).

  Of the other end side blocking portion 7, the shoulder portion 10, which is a neighboring region continuous to the proximal end of the mouth portion 4, is formed in a flat plate shape, and the shoulder surface 11 that is the outer surface of the shoulder portion 10 is formed in a flat surface. ing. A metal inner annular member 12 is insert-molded inside the mouth portion 4 in the radial direction. The inner annular member 12 is also referred to as a base or a port member. In addition, since the said exterior body 9 is formed by injection molding, the synthetic resin suitable for injection molding, such as polyethylene and a polypropylene, is used. For the inner annular member 12, copper, brass, stainless steel, high-tensile steel, structural carbon steel, aluminum, or the like is used.

  The composite container 1 in the present embodiment has a size corresponding to, for example, 48 liters (20 kg) and 118 liters (50 kg) as an accommodation capacity of liquefied gas, and the strength of the container body 2 and the container body 2 by winding. It can withstand the standard drop impact force, bursting pressure, repeated pressure, environmental degradation, damage, impact, high temperature exposure and the like.

  The composite container 1 includes a base structure 13 having excellent gas sealing properties. The base structure 13 is provided in the mouth part 4. That is, the base structure 13 includes the inner annular member 12, an outer annular member 14 fitted on the outside of the mouth portion 4, a male screw member 15 for fixing the outer annular member 14 to the mouth portion 4, and a seal portion. And.

  The inner annular member 12 includes a first opposing flange portion 17 that protrudes radially outward on the protruding end surface 16 side of the mouth portion 4. The first opposed flange portion 17 is formed in an annular shape and is in contact with the protruding end surface 16 of the mouth portion 4 from the outside. The first facing flange 17 is formed to have a slightly smaller diameter than the protruding end surface 16 of the mouth 4.

  The inner annular member 12 is on the inner peripheral surface side of the mouth portion 4 with respect to the first opposing flange portion 17, and a contact portion 18 fixed in contact with the inner peripheral surface of the mouth portion 4, and the first opposing flange portion 17 is further provided with a projecting portion 19 projecting from the mouth portion 4. A valve mounting recess 20 for mounting a valve (not shown) is formed at the center of the inner annular member 12. The contact portion 18 has a resin entry portion R1 into which resin has entered in order to form a labyrinth portion R with the proximal end side inner peripheral surface of the mouth portion 4 on the back side (the accommodation space side inside the accommodation barrel portion 3). Is formed.

  The outer annular member 14 includes a second opposing collar portion 21 that faces the first opposing collar portion 17 in the axial direction L of the mouth portion 4, a cylindrical portion 22 that fits the mouth portion 4 outside the mouth portion 4, An abutting portion 23 that abuts in the axial direction L of the mouth portion 4 on the shoulder surface 11 at the end portion of the cylindrical portion 22 and that is continuous with the mouth portion 4 side in the housing barrel portion 3, and is outside the abutting portion 23. And an annular skirt 24 that is in contact with the shoulder surface 11 of the housing body 3 in the axial direction L of the mouth 4 is integrally provided.

  The male screw member 15 is formed in a cylindrical shape and is fitted on the outer peripheral surface of the proximal end side of the mouth portion 4. A female screw portion 25 is formed on the inner peripheral surface of the cylindrical portion 22 on the housing body 3 side. The outer annular member 14 is fitted to the mouth 4 via the male screw member 15 by screwing the female screw portion 25 to the male screw member 15.

  The second opposing collar portion 21 is a portion facing the first opposing collar portion 17 in the axial direction L of the mouth portion 4, and is formed in an annular shape. An opening 21 a that allows the valve to be inserted into the valve mounting recess 20 is formed inwardly in the radial direction of the second counter flange 21. An O-ring, which is an elastically deformable first annular seal member 26, is disposed between the first opposed flange portion 17 and the second opposed flange portion 21, and the first annular seal member 26 has the outer annular member 14 as a mouth. By being fitted to the part 4 via the male screw member 15, the first opposed collar part 17 and the second opposed collar part 21 are sandwiched in an elastically deformed state. A part of the outer peripheral surface of the outer annular member 14 is notched to form a gripping surface 22a for gripping with the drawing tool.

  At least a part of the inner peripheral surface of the cylindrical portion 22 (in this case, only the middle portion in the axial direction L) is provided with a cylindrical tapered surface 27 that sequentially expands toward the housing barrel 3 side. The inclination of the cylindrical taper surface 27 and the inclination of the mouth taper surface 28 are different from each other, and the inclination angle of the cylinder taper surface 27 is slightly larger than the inclination angle of the mouth taper surface 28 ( Near the direction along the axial direction L). The cylindrical taper surface 27 and the mouth taper surface 28 are fitted together.

  The lower end surface of the contact portion 23 is a flat surface, and a groove 30 for mounting an O-ring that is a second annular seal member 29 that can be elastically deformed is formed radially inward. The outer annular member 14 is fitted into the mouth portion 4 via the male screw member 15, so that the flat surface which is the lower end surface of the contact portion 23 is pressed against the flat surface which is the shoulder surface 11 of the shoulder portion 10. The second annular seal member 29 is sandwiched between the bottom surface of the groove 30 and the shoulder surface 11 in an elastically deformed state. In addition, as for the 1st annular seal member 26 and the 2nd annular seal member 29, the thing made from the synthetic rubber excellent in durability with respect to gas is used.

  Winding is applied to the outer surface of the container main body 2 in a state where the outer annular member 14 is fitted to the mouth portion 4 via the male screw member 15. In this embodiment, the winding consists of three layers. However, the winding has at least three layers, and may have four or more layers, and in some cases, several tens of layers with respect to the design strength. The winding includes an inner side (the container body 2 side), outermost hoop winding layers 31 and 32, and a helical winding layer 33 between the hoop winding layers 31 and 32. Since the winding is also applied to the shoulder surface 11, the winding is also provided on the outer surface of the skirt portion 24, and presses the skirt portion 24 from the outside to the shoulder surface 11.

  That is, the base structure 13 of the composite container 1 in the present embodiment includes four seal portions, that is, a first seal portion S1, a second seal portion S2, a taper seal portion S3, and a shoulder surface seal portion S4.

  The first seal portion S1 is elastically deformable between the first opposed collar portion 17 and the second opposed collar portion 21 in a state where the first opposed collar portion 17 is in contact with the protruding end surface 16 of the mouth portion 4. The annular seal member 26 is sandwiched. The second seal portion S2 is configured so that the contact portion 23 and the shoulder surface of the outer annular member 14 are in contact with the shoulder surface 11 of the housing body 3 in the axial direction L of the mouth portion 4. 11, a second annular seal member 29 that can be elastically deformed is sandwiched. The shoulder surface seal portion S4 is configured such that the skirt portion 24 of the outer annular member 14 is pressed against the shoulder surface 11 by winding. The taper seal portion S3 is configured such that the tube portion taper surface 27 and the mouth taper surface 28 are fitted. And these seal parts are the structures which can improve the sealing performance in the axial direction L by fastening the outer side annular member 14 to the external thread member 15, respectively.

  According to the base structure 13 of the present embodiment, when the liquefied gas filled in the housing body 3 leaks through the contact portion (labyrinth portion R) between the mouth 4 and the inner annular member 12. The gas is sandwiched in the axial direction L of the mouth portion 4 between the first opposed flange portion 17 of the inner annular member 12 and the second opposed flange portion 21 of the outer annular member 14 in the first seal portion S1. Sealed by a single annular seal member 26.

  Moreover, when the liquefied gas with which the accommodating cylinder part 3 is filled leaks along the contact part of the opening | mouth part 4 and the inner side annular member 12, gas is accommodated in the accommodating cylinder part 3 in 2nd seal part S2. The second annular seal member 29 is sandwiched between the shoulder surface 11 and the contact portion 23 of the outer annular member 14 in the axial direction L of the mouth portion 4.

  Further, the gas is sealed also by the taper seal portion S3 in which the tube portion taper surface 27 and the mouth taper surface 28 are fitted, and the skirt portion 24 of the outer annular member 14 is pressed against the shoulder surface 11 by winding. Gas sealing can also be expected at the face seal portion S4.

  For example, without forming the mouth taper surface 28 in the mouth portion 4, the mouth portion 4 can have the same diameter and can be fitted to the tube portion taper surface 27. However, the sealing performance can be improved by providing a length in the predetermined axial direction L to the cylindrical tapered surface 27 and the mouth tapered surface 28 to ensure a region where both surfaces are pressed.

  In the present embodiment, the hoop winding layer 31 is 0.3 to 0.5 mm on the outside of the blown container body 2 (plastic liner) in order to set the pressure resistance of the container body 2 subjected to winding to 10 Mpa or more. Filament winding is performed by setting the helical winding layer 33 to 1.0 to 1.8 mm and the hoop winding layer 32 to 0.8 to 1.2 mm.

  In the above embodiment, the outer annular member 14 is made of metal, but can also be formed of a synthetic resin such as high-density polyethylene. Moreover, in the said embodiment, in order to reinforce the container main body 2, the example which performed the winding on the outer surface was shown. However, the container body 2 can be reinforced by reinforcement with a braided net tube, winding with a prepreg tape, or the like.

  DESCRIPTION OF SYMBOLS 1 ... Composite container, 2 ... Container main body, 3 ... Housing trunk | drum, 4 ... Mouth part, 6 ... One end side obstruction | occlusion part, 7 ... Other end side obstruction | occlusion part, 9 ... Exterior body, 10 ... Shoulder part, 11 ... Shoulder surface , 12 ... Inner annular member, 13 ... Base structure, 14 ... Outer annular member, 15 ... Male screw member, 16 ... Projection end surface, 17 ... First opposed flange, 19 ... Projected portion, 21 ... Second opposed collar, 21a ... Opening, 22 ... Cylinder part, 23 ... Contact part, 24 ... Bottom part, 25 ... Female thread part, 26 ... First annular seal member, 27 ... Cylinder taper surface, 28 ... Taper taper surface, 29 ... Second Annular seal member, 30 ... groove, 31, 32 ... hoop winding layer, 33 ... helical winding layer, S1 ... first seal portion, S2 ... second seal portion, S3 ... taper seal portion, S4 ... shoulder surface seal portion

Claims (4)

The housing barrel and the cylindrical mouth provided so as to protrude from the housing barrel so as to fill or take out the liquefied gas from the housing barrel are integrally formed of synthetic resin, and the housing barrel A base structure provided in the mouth part of the composite container in which the periphery of the part is reinforced,
A metal inner annular member insert-molded inside the mouth portion, and an outer annular member fitted outside the mouth portion;
The inner annular member includes a first opposing collar that projects radially outward on the projecting end face side of the mouth, and the outer annular member is a second opposing collar that faces the first opposing collar in the axial direction of the mouth. Part
A male screw member fitted to the outer peripheral surface of the base end side of the mouth,
The outer annular member is screwed into the male screw member in a state where the first opposing collar is in contact with the protruding end surface of the mouth , so that the first opposing collar can be elastically deformed between the first opposing collar and the second opposing collar. first annular sealing member is sandwiched, comprises a first seal portion,
A base structure for a composite container , wherein a taper seal portion is provided on a contact surface between the outer peripheral surface of the mouth portion and the inner peripheral surface of the outer annular member .   The outer annular member includes a contact portion that contacts an axial direction of the mouth portion on a shoulder surface that is continuous with the base end of the mouth portion in the housing body, and is elastically deformable between the corresponding contact portion and the shoulder surface. The base structure of the composite container according to claim 1, further comprising a second seal portion between which the two annular seal members are sandwiched.   The outer annular member has an annular hem that spreads outward from the abutting portion and abuts against the shoulder surface of the housing body in the axial direction of the mouth, and the hem is pressed against the shoulder surface by filament winding. The base structure of the composite container according to claim 2, further comprising a shoulder surface seal portion. The container body and a cylindrical mouth provided so as to protrude from the container body so as to fill or take out the liquefied gas from the container body are integrally formed of synthetic resin. A composite container comprising the base structure according to any one of claims 1 to 3 , wherein filament winding is performed around the portion.

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