JP2017096319A - Pressure vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure vessel that can restrain accumulation of static electricity, and can use an existing general-purpose valve.SOLUTION: A pressure vessel 1 comprises: a resin liner 2 that defines a housing chamber 11 that houses high-pressure fluid, and includes a cylindrical neck part 12 that protrudes outward; and a cylindrical mouthpiece member 3 provided on an inner periphery of the cylindrical neck part 12. The mouthpiece member 3 includes a protruding part 22 that protrudes in the housing chamber 11 of the resin liner 2. The protruding part 22 comprises: a cylindrical side wall part 26; a bottom wall part 27 that blocks a protruding end part of the side wall part 26; and at least one through hole 28 formed in the side wall part 26.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a resin pressure vessel for containing a high-pressure fluid.

  For example, as a pressure vessel for storing high pressure fluid such as LPG (liquefied petroleum gas) or LNG (liquefied natural gas), a resin liner that defines a storage chamber for storing high pressure fluid and includes a cylindrical neck portion protruding outward A resin pressure vessel is known that includes a base member provided on the outer periphery of a cylindrical neck portion and a reinforcing layer covering the outer periphery of the resin liner. A valve for injecting high-pressure fluid into or out of the resin liner is attached to the inside of the base member.

  In such a resin pressure vessel, since the storage chamber for storing the high-pressure fluid is defined by the resin liner that is an insulator, when the high-pressure fluid contacts or collides with the flow path of the valve or the storage chamber of the resin liner. The generated static electricity is accumulated on the surface of the resin liner. If the amount of accumulated static electricity increases, it may cause sparks due to electrostatic discharge. The greater the flow rate of the high-pressure fluid during injection into the storage chamber, the greater the impact when the high-pressure fluid collides with the bottom wall of the storage chamber, and the greater the amount of static electricity accumulated. Therefore, a valve having a flow direction changing structure for changing the flow direction of the high-pressure fluid at the time of injection into the storage chamber from the vertical direction to the horizontal direction is known in order to reduce the flow velocity of the high-pressure fluid at the time of injection into the storage chamber. (For example, Patent Document 1).

US Pat. No. 7,656,642

  However, in the above prior art, it is necessary to prepare a dedicated valve having the above flow direction changing structure. In addition, since the pressure vessel is usually configured so that an existing general-purpose valve can also be attached, the user of the pressure vessel mistakenly attaches the existing general-purpose valve to the pressure vessel instead of the valve having the above flow direction changing structure. There is also a possibility. Therefore, it is preferable that the flow direction changing structure is provided not in the valve but in the pressure vessel.

  In view of the above problems, the problem to be solved by the present invention is to provide a pressure vessel that can suppress the accumulation of static electricity and can use an existing general-purpose valve.

  The pressure vessel according to the present invention defines a storage chamber (11) for storing a high-pressure fluid, a resin liner (2) including a cylindrical neck portion (12) protruding outward, and the cylindrical neck portion (12). A pressure vessel (1) comprising a cylindrical cap member (3) provided on the inner periphery and a reinforcing layer (4) covering the outer periphery of the resin liner (2), wherein the cap member (3) Includes a projecting portion (22) projecting into the housing chamber (11), and the projecting portion (22) closes the tubular side wall portion (26) and the projecting end of the side wall portion (26). It has a wall part (27) and at least 1 through-hole (28) formed in the said side wall part (26), It is characterized by the above-mentioned.

  According to this structure, the flow direction of the high-pressure fluid at the time of pouring into the storage chamber (11) of the resin liner (2) is changed from the vertical direction to the horizontal direction by the protrusion (22) of the base member (3). Thus, the flow rate of the high-pressure fluid can be reduced. As a result, since the impact when the high-pressure fluid collides with the bottom wall portion or the side wall portion of the storage chamber (11) is mitigated, accumulation of static electricity on the resin liner (2) can be suppressed. Moreover, since the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction is provided in the base member (3) instead of the valve (5), an existing general-purpose valve can be used.

  Moreover, the pressure vessel according to the present invention is characterized in that the base member (3) is fixed to the resin liner (2) in a non-detachable manner.

  According to this structure, a nozzle | cap | die member (3) can be comprised integrally with a pressure vessel (1). Thereby, since the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction can be provided in the pressure vessel (1) instead of the valve (5), the existing general-purpose valve can be used. .

  The pressure vessel according to the present invention defines a storage chamber (11) for storing a high-pressure fluid, a resin liner (2) including a cylindrical neck portion (12) protruding outward, and the cylindrical neck portion (12). Reinforcing the outer periphery of the cylindrical base member (3) provided on the inner periphery, the cylindrical attachment member (8) provided on the inner periphery of the base member (3), and the resin liner (2) A pressure vessel (1) comprising a layer (4), wherein the attachment member (8) includes a protrusion (42) protruding into the storage chamber (11), wherein the protrusion (42) A cylindrical side wall (44), a bottom wall (45) that closes the protruding end of the side wall (44), and at least one through hole (46) formed in the side wall (44). It is characterized by that.

  According to this configuration, the flow direction of the high-pressure fluid during the injection of the resin liner (2) into the storage chamber (11) is changed from the vertical direction to the horizontal direction by the protrusion (42) of the attachment member (8). Thus, the flow rate of the high-pressure fluid can be reduced. Thereby, since the impact when a high pressure fluid collides with the bottom wall part or side wall part of a storage chamber (11) is relieve | moderated, accumulation | storage of the static electricity to a resin liner (2) can be suppressed. Moreover, since the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction is provided in the attachment member (8) instead of the valve (5), an existing general-purpose valve can be used.

  The pressure vessel according to the present invention is characterized in that the attachment member (8) is fixed to the base member (3) so as not to be attached or detached.

  According to this structure, an attachment member (8) can be comprised integrally with a pressure vessel (1). Thereby, since the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction can be provided in the pressure vessel (1) instead of the valve (5), the existing general-purpose valve can be used. .

  According to the present invention, it is possible to provide a pressure vessel that can suppress accumulation of static electricity and that can use an existing general-purpose valve.

The partially broken longitudinal cross-sectional view which shows the pressure vessel by 1st Embodiment of this invention 1 is an enlarged view of the main part of FIG. Enlarged view inside broken line circle III in FIG. The partially broken longitudinal cross-sectional view which shows the pressure vessel by 2nd Embodiment of this invention 4 is an enlarged view of the main part of FIG. Enlarged view of broken line VI in FIG. Perspective view of attachment member The figure which shows the modification of 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
First, the pressure vessel by 1st Embodiment of this invention is demonstrated with reference to FIGS. 1-3. The pressure vessel according to the present invention is a resin pressure vessel, and can accommodate a high-pressure fluid such as LPG (liquefied petroleum gas) or LNG (liquefied natural gas).

  As shown in FIGS. 1 and 2, the pressure vessel 1 according to the first embodiment of the present invention defines a storage chamber 11 for storing a high-pressure fluid, and includes a resin liner 2 including a cylindrical neck portion 12 protruding outward. A cylindrical base member 3 provided on the inner periphery of the cylindrical neck portion 12 and a reinforcing layer 4 covering the outer periphery of the resin liner 2 are provided. A valve 5 for pouring and discharging a high-pressure fluid is attached inside the base member 3. A seal member 6 is interposed between the cylindrical neck portion 12 and the base member 3.

  The material of the resin liner 2 is selected according to the high-pressure fluid to be accommodated and the filling conditions (for example, filling pressure). For example, polyethylene (PE), high-density polyethylene (HDPE), polyamide, polyketone, polyphenylene sulfide (PPS), etc. Can be used.

  The base member 3 is made of metal, and is continuously formed on the main body 21 and the main body 21 that is fixed to the cylindrical neck portion 12 of the resin liner 2, and is formed in the housing chamber 11 of the resin liner 2. And a projecting portion 22 having a substantially cylindrical shape. The base member 3 is integrally provided on the cylindrical neck portion 12 of the resin liner 2 by insert blow molding. That is, the base member 3 is configured integrally with the pressure vessel 1.

  Referring to FIG. 3, the body portion 21 of the base member 3 is formed in a cylindrical tube portion 21 a and an annular upper side formed continuously with one end of the tube portion 21 a and extending outward in the circumferential direction of the tube portion 21 a. It has a flange 21b and an annular lower flange 21c that is formed continuously with the other end of the tube portion 21a and extends outward in the circumferential direction of the tube portion 21a. The upper flange 21 b extends to the upper side of the cylindrical neck portion 12, and the upper flange 21 b extends to the lower side of the cylindrical neck portion 12. The outer peripheral surface of the cylindrical portion 21 a abuts on the inner peripheral surface of the cylindrical neck portion 12, the lower surface of the upper flange 21 b abuts on the upper surface of the cylindrical neck portion 12, and the upper surface of the lower flange 21 c is the upper surface of the cylindrical neck portion 12. It is in contact with the lower surface. A mounting groove 23 (in the illustrated example, a female screw) for mounting the valve 5 is formed on the inner peripheral surface of the cylindrical portion 21a of the main body portion 21. A seal receiving groove 24 in which the seal member 6 is disposed is formed on the outer peripheral surface of the cylinder portion 21 a of the main body portion 21.

  The protruding portion 22 of the base member 3 has a cylindrical side wall portion 26 and a bottom wall portion 27 that is formed continuously with the side wall portion 26 and closes the protruding end portion of the side wall portion 26. The other end portion of the side wall portion 26 is open, and the inner peripheral surface of the other end portion of the side wall portion 26 is continuous with the inner peripheral surface of the cylindrical portion 21 a of the main body portion 21. A through hole 28 having a circular cross section is formed in the side wall portion 26. In the present embodiment, four through holes 28 are formed at equal intervals in the circumferential direction of the side wall portion 26. The shape, number, and arrangement interval of the through holes 28 are not particularly limited, and can be variously changed.

  The reinforcing layer 4 is made of, for example, FRP (fiber reinforced plastic) and plays a role of reinforcing the pressure strength of the resin liner 2. The reinforcing layer 4 is installed on the outer surfaces of the resin liner 2 and the base member 3 by using, for example, a filament winding method in which a fiber bundle impregnated with a resin is wound and the resin is cured. In addition, the installation method of the reinforcement layer 4 is not specifically limited, You may use other methods, such as the sheet winding method which winds the resin sheet in which the fiber was embedded.

  The valve 5 is a general-purpose valve that is generally used for pouring and discharging high-pressure fluid. The valve 5 includes a valve main body portion 31 and a cylindrical insertion portion 32 that is formed continuously with the valve main body portion 31 and is inserted inside the base member 3. The valve main body 31 has a pouring port 33, an opening / closing valve (not shown), and a handle 34 for opening and closing the opening / closing valve (see FIG. 2). The insertion portion 32 has a communication hole 35 penetrating in the axial direction. On the outer peripheral surface of the insertion portion 32, an engagement protrusion 36 (in the illustrated example, a taper screw made of a male screw) that can be engaged with the mounting groove 23 formed on the inner peripheral surface of the main body portion 21 of the base member 3 is formed. Has been. The valve 5 is attached to the base member 3 by engaging the engagement protrusion 36 of the valve 5 with the mounting groove 23 of the base member 3.

  The seal member 6 is, for example, an O-ring, and is disposed in a seal receiving groove 24 formed on the outer peripheral surface of the cylindrical portion 21 a of the main body portion 21 of the base member 3. The seal member 6 is in contact with the bottom surface of the seal receiving groove 24 and the inner peripheral surface of the cylindrical neck portion 12 so that the high-pressure fluid stored in the storage chamber 11 of the resin liner 2 does not leak to the outside. The gap between the base member 3 and the cylindrical neck portion 12 of the resin liner 2 is sealed. A backup ring for preventing the seal member 6 from protruding may be further disposed in the seal receiving groove 24.

  An arrow B in FIG. 3 indicates the flow direction of the high-pressure fluid when the resin liner 2 is injected into the storage chamber 11. As shown in FIG. 3, the high-pressure fluid flows through the communication hole 35 of the valve 5 along the hole axis A direction (that is, the vertical direction) of the communication hole 35, and the side wall portion of the protrusion 22 of the base member 3. 26 is introduced into a space 29 in the interior. The high-pressure fluid introduced into the space 29 in the side wall portion 26 collides with the inner surface of the bottom wall portion 27, so that the flow direction is perpendicular to the direction of the hole axis A of the communication hole 35 (that is, the horizontal direction). In other words, the resin is discharged from the through holes 28 formed in the side wall portion 26 of the protruding portion 22 into the storage chamber 11 of the resin liner 2.

  As described above, according to the pressure vessel 1 according to the first embodiment, the flow direction of the high-pressure fluid when the resin liner 2 is injected into the storage chamber 11 is changed from the vertical direction to the horizontal direction by the protruding portion 22 of the base member 3. Can be changed. In the present embodiment, since four through holes 28 are formed, the flow of the high-pressure fluid can be changed from one vertical flow to four horizontal flows. Thereby, the flow velocity of the high-pressure fluid at the time of injection into the storage chamber 11 can be reduced. As a result, since the impact when the high-pressure fluid collides with the bottom wall portion or the side wall portion of the storage chamber 11 is mitigated, accumulation of static electricity on the resin liner 2 can be suppressed. In the pressure vessel 1 according to the first embodiment, the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction is provided in the base member 3 instead of the valve 5. A valve can be used.

  Further, according to the pressure vessel 1 according to the first embodiment, the base member 3 is fixed to the cylindrical neck portion 12 of the resin liner 2 so as not to be detachable, and is configured integrally with the pressure vessel 1. Thereby, since the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction can be provided in the pressure vessel 1 instead of the valve 5, the existing general-purpose valve can be used.

(Second Embodiment)
Next, a pressure vessel according to a second embodiment of the present invention will be described with reference to FIGS. The same elements as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIGS. 4 to 6, the pressure vessel 1 according to the second embodiment of the present invention defines a storage chamber 11 for storing a high-pressure fluid and includes a cylindrical neck portion 12 protruding outward. Reinforcing the outer periphery of the liner 2, the cylindrical cap member 3 provided on the inner periphery of the cylindrical neck portion 12, the cylindrical attachment member 8 provided on the inner periphery of the cap member 3, and the resin liner 2 Layer 4. A valve 5 for pouring out high-pressure fluid is attached to the inside of the attachment member 8. A seal member 7 is interposed between the cylindrical neck portion 12 and the base member 3 and the attachment member 8.

  The seal member 7 is, for example, an O-ring, and is disposed in a seal receiving groove 25 formed on the upper end surface of the cylindrical neck portion 12 of the resin liner 2. The seal member 7 seals between the cylindrical neck portion 12 and the attachment member 8 by contacting the bottom surface of the seal receiving groove 25 and the attachment member 8. A backup ring for preventing the seal member 6 from protruding may be further disposed in the seal receiving groove 25.

  In the pressure vessel 1 according to the second embodiment, the base member 3 includes only the annular main body portion 21 and does not include the protruding portion 22 (see FIG. 3). The base member 3 (main body portion 21) does not have the upper flange 21b (see FIG. 3). The upper end portion 12 a of the cylindrical neck portion 12 of the resin liner 2 is formed so as to protrude inside the cylindrical neck portion 12, and the upper end portion 3 a of the base member 3 is the upper end portion 12 a of the cylindrical neck portion 12. It is formed in a shape that can accept.

  The attachment member 8 can be attached to the base member 3 by interposing between the base member 3 and the valve 5 when the size of the insertion portion 32 of the valve 5 does not match the size of the base member 3. It is a member for making. The attachment member 8 is made of metal, is formed substantially continuously with the main body 41 and the main body 41 fixed to the inner periphery of the base member 3 and protrudes into the housing chamber 11 of the resin liner 2. And a cylindrical protrusion 42.

  6 and 7, the main body 41 of the attachment member 8 is formed continuously with a cylindrical tube portion 41a and one end of the tube portion 41a, and extends outward in the circumferential direction of the tube portion 41a. And an annular flange 41b.

  An engagement protrusion 43 (in the illustrated example, a male screw) that can be engaged with the mounting groove 23 formed on the inner peripheral surface of the base member 3 (main body portion 21) is formed on the outer peripheral surface of the cylindrical portion 41a. . The attachment member 8 is attached to the base member 3 by engaging the engagement protrusion 43 of the attachment member 8 with the mounting groove 23 of the base member 3. A mounting groove 44 for mounting the valve 5 (in the illustrated example, a taper screw made of a female screw) is formed on the inner peripheral surface of the cylindrical portion 41a.

  The flange 41b extends above the upper end portion 3a of the base member 3 and the upper end portion 12a of the cylindrical neck portion 12, and the lower surface of the flange 41b is the upper end portion of the upper end portion 3a of the base member 3 and the upper end portion of the cylindrical neck portion 12. It is in contact with the upper surface of the portion 12a. The lower surface of the flange 41b is formed in a shape that can receive the upper end portion 3a of the base member 3 and the upper end portion 12a of the cylindrical neck portion 12, and the peripheral lower end portion 41c of the flange 41b is covered with the reinforcing layer 4. It has been broken. Thereby, the main-body part 41 is being fixed to the nozzle | cap | die member 3 so that attachment or detachment is impossible. That is, the attachment member 8 is configured integrally with the pressure vessel 1.

  The protruding portion 42 of the attachment member 8 has a cylindrical side wall portion 45 and a bottom wall portion 46 that is formed continuously with the side wall portion 45 and closes the protruding end portion of the side wall portion 45. The other end portion of the side wall portion 45 is open, and the inner peripheral surface of the other end portion of the side wall portion 45 is continuous with the inner peripheral surface of the cylindrical portion 41 a of the main body portion 41. A through hole 47 having a circular cross section is formed in the side wall 45. In the present embodiment, four through holes 47 are formed at equal intervals in the circumferential direction of the side wall portion 45. The shape, number, and arrangement interval of the through holes 47 are not particularly limited, and can be variously changed.

  An arrow C in FIG. 6 indicates the flow direction of the high-pressure fluid when the resin liner 2 is injected into the storage chamber 11. As shown in FIG. 6, the high-pressure fluid flows through the communication hole 35 of the valve 5 along the hole axis A direction (that is, the vertical direction) of the communication hole 35, and the side wall portion of the protrusion 42 of the attachment member 8. 45 is introduced into a space 48 within 45. The high-pressure fluid introduced into the space 48 in the side wall 45 collides with the inner surface of the bottom wall 46 so that the flow direction is perpendicular to the direction of the hole axis A of the communication hole 35 (that is, in the horizontal direction). In other words, the resin is discharged from the through holes 47 formed in the side wall 45 of the protrusion 42 into the storage chamber 11 of the resin liner 2.

  As described above, according to the pressure vessel 1 according to the second embodiment, the flow direction of the high-pressure fluid when the resin liner 2 is injected into the storage chamber 11 is changed from the vertical direction to the horizontal direction by the protrusion 42 of the attachment member 8. Can be changed. In the present embodiment, since four through holes 47 are formed, the flow of the high-pressure fluid can be changed from one flow in the vertical direction to four flows in the horizontal direction. Thereby, the flow velocity of the high-pressure fluid at the time of injection into the storage chamber 11 can be reduced. As a result, since the impact when the high-pressure fluid collides with the bottom wall portion or the side wall portion of the storage chamber 11 is mitigated, accumulation of static electricity on the resin liner 2 can be suppressed. In the pressure vessel 1 according to the second embodiment, the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction is provided in the base member 3 instead of the valve 5. Can be used.

  In addition, according to the pressure vessel 1 according to the second embodiment, the attachment member 8 is fixed to the base member 3 in a non-detachable manner by covering the peripheral lower end 41c of the flange 41b of the main body 41 with the reinforcing layer 4. Has been. That is, the attachment member 8 is configured integrally with the pressure vessel 1. Thereby, since the flow direction changing structure for changing the flow direction of the high-pressure fluid from the vertical direction to the horizontal direction can be provided in the pressure vessel 1 instead of the valve 5, the existing general-purpose valve can be used.

  Moreover, as shown in FIG. 8, you may comprise the main-body part 41 and the protrusion part 42 of the attachment member 8 as a different body. In this case, it is preferable that the main body portion 41 is fixed to the base member 3 so as not to be detachable, and the protruding portion 42 is configured so that it cannot be detached after being attached to the main body portion 41. In this case, the protruding portion 42 may be made of resin.

  Although the present invention has been described above with reference to preferred embodiments thereof, the present invention is not limited to such embodiments and can be deviated from the spirit of the present invention, as will be readily understood by those skilled in the art. It is possible to change appropriately within the range not to be. In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Pressure vessel 2 Resin liner 3 Cap member 4 Reinforcement layer 5 Valve 8 Attachment member 11 Accommodating chamber 12 Cylindrical neck part 22 Projection part 26 Side wall part 27 Bottom wall part 28 Through hole 42 Projection part 45 Side wall part 46 Bottom wall part 47 Through Hole

Claims (4)

A resin liner that defines a storage chamber for storing a high-pressure fluid and includes a cylindrical neck portion protruding outward;
A cylindrical cap member provided on the inner periphery of the cylindrical neck portion;
A pressure vessel provided with a reinforcing layer covering the outer periphery of the resin liner,
The base member includes a protrusion protruding into the accommodation chamber;
The pressure vessel, wherein the protruding portion has a cylindrical side wall portion, a bottom wall portion that closes the protruding end portion of the side wall portion, and at least one through hole formed in the side wall portion.   The high-pressure container according to claim 1, wherein the base member is fixed to the resin liner so as not to be detached. A resin liner that defines a storage chamber for storing a high-pressure fluid and includes a cylindrical neck portion protruding outward;
A cylindrical cap member provided on the inner periphery of the cylindrical neck portion;
A cylindrical attachment member provided on the inner periphery of the base member;
A pressure vessel provided with a reinforcing layer covering the outer periphery of the resin liner,
The attachment member includes a protruding portion protruding into the accommodation chamber;
The pressure vessel, wherein the protruding portion has a cylindrical side wall portion, a bottom wall portion that closes the protruding end portion of the side wall portion, and at least one through hole formed in the side wall portion.   The high-pressure container according to claim 3, wherein the attachment member is fixed to the base member in a non-detachable manner.

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