Pressure vessel
View Patent ↗An embodiment pressure vessel includes a nozzle part, a liner part, and a composite material part. The nozzle part extends upward and includes a first nozzle portion and a second nozzle portion connected to a lower side of the first nozzle portion and having a greater diameter than a diameter of the first nozzle portion, and an area of the second nozzle portion adjacent to the first nozzle portion in a top-down view defines a first boundary area. The liner part defines an inner space and surrounds a lower side of the nozzle part, and an upper end of the liner part covers the first boundary area, and the composite material part is coupled to an outer side of the liner part and is configured to surround the liner part.
1 . A pressure vessel comprising:
a nozzle part comprising:
a first nozzle portion; and
a second nozzle portion connected to a lower side of the first nozzle portion and having a second diameter equal or greater than a first diameter of the first nozzle portion, wherein an area of the second nozzle portion adjacent to the first nozzle portion defines a first boundary area;
a liner part defining an inner space and surrounding a lower side of the nozzle part, wherein an upper end of the liner part covers the first boundary area; and
a composite material part coupled to an outer side of the liner part and configured to surround the liner part,
wherein the first boundary area is the area of the second nozzle portion in which the second diameter starts to change from a small size to a big size,
wherein at least a portion of the upper end of the liner part is disposed between the composite material part and the first boundary area, and
wherein an upper end of the composite material part is in contact with the first nozzle portion.
2 . The pressure vessel of claim 1 , wherein the first boundary area is rounded toward an outer side of the nozzle part in a radial direction of the nozzle part.
3 . The pressure vessel of claim 2 , wherein
the first nozzle portion has a constant diameter.
4 . The pressure vessel of claim 3 , wherein:
the liner part comprises a first contact portion;
a lower side of the first contact portion is in contact with an upper end of the second nozzle portion;
an upper end of the first contact portion is in contact with the first boundary area; and
an upper side of the first contact portion is disposed along an isotensoid curve.
5 . The pressure vessel of claim 4 , wherein:
the liner part further comprises a second contact portion; and
an upper side of the second contact portion is in contact with a lower end of the second nozzle portion and is connected to the first contact portion.
6 . The pressure vessel of claim 5 , wherein:
the liner part further comprises a body portion;
an upper end of the body portion is connected to the first contact portion and the second contact portion;
a boundary area between the second contact portion and the body portion defines a second boundary area; and
the second boundary area is rounded along an outer side in the radial direction.
7 . The pressure vessel of claim 5 , wherein:
the nozzle part further comprises:
a first groove recessed downward from an upper surface of the second nozzle portion; and
a second groove recessed upward from a lower surface of the second nozzle portion; and
the liner part further comprises:
a first protrusion protruding downward from the first contact portion and inserted into the first groove; and
a second protrusion protruding upward from the second contact portion and inserted into the second groove.
8 . The pressure vessel of claim 7 , wherein:
the first groove comprises:
a first elongated groove extending downward from the upper surface of the second nozzle portion; and
a second elongated groove extending inward from a lower end of the first elongated groove in the radial direction; and
the second groove comprises:
a first elongated groove extending upward from the lower surface of the second nozzle portion; and
a second elongated groove extending outward from an upper end of the first elongated groove of the second groove in the radial direction.
9 . The pressure vessel of claim 7 , wherein:
a shape of the first protrusion corresponds to a shape of the first groove; and
a shape of the second protrusion corresponds to a shape of the second groove.
10 . The pressure vessel of claim 7 , wherein:
the nozzle part further comprises a third groove recessed upward from the lower surface of the second nozzle portion and disposed inside the second groove in the radial direction; and
the liner part further comprises a third protrusion protruding upward from an inner end of the second contact portion in the radial direction and inserted into the third groove.
11 . The pressure vessel of claim 10 , wherein a length of the third groove in the radial direction is greater than a length of the third protrusion in the radial direction.
12 . The pressure vessel of claim 1 , wherein a length of the first nozzle portion in a radial direction of the nozzle part is 35% or less of a longest length among lengths of the liner part in the radial direction.
13 . A pressure vessel comprising:
a nozzle part comprising:
a first nozzle portion; and
a second nozzle portion connected to a lower side of the first nozzle portion and having a second diameter equal or greater than a first diameter of the first nozzle portion, wherein an area of the second nozzle portion adjacent to the first nozzle portion defines a first boundary area, and wherein the second nozzle portion comprises:
a first nozzle area having a diameter that increases toward a lower side; and
a second nozzle area connected to a lower side of the first nozzle area and having a diameter that decreases toward the lower side;
a liner part defining an inner space and surrounding a lower side of the nozzle part, wherein an upper end of the liner part covers the first boundary area; and
a composite material part coupled to an outer side of the liner part and configured to surround the liner part,
wherein the first boundary area is the area of the second nozzle portion in which the second diameter starts to change from a small size to a big size,
wherein at least a portion of the upper end of the liner part is disposed between the composite material part and the first boundary area, and
wherein an upper end of the composite material part is in contact with the first nozzle portion.
14 . The pressure vessel of claim 13 , wherein a first length that is a length by which a boundary portion between the first nozzle area and the second nozzle area protrudes from the first nozzle portion in a radial direction of the nozzle part is smaller than a second length that is a length of the second nozzle portion in an up-down direction.
15 . The pressure vessel of claim 14 , wherein:
the composite material part comprises a winding band having a predetermined width surrounding the liner part; and
the first length is greater than a width of the winding band.
16 . The pressure vessel of claim 13 , wherein:
the first boundary area is rounded toward an outer side of the nozzle part in a radial direction of the nozzle part;
the first nozzle portion has a constant diameter;
the liner part comprises a first contact portion;
a lower side of the first contact portion is in contact with an upper end of the second nozzle portion;
an upper end of the first contact portion is in contact with the first boundary area;
an upper side of the first contact portion is disposed along an isotensoid curve;
the liner part further comprises a second contact portion; and
an upper side of the second contact portion is in contact with a lower end of the second nozzle portion and is connected to the first contact portion.
17 . The pressure vessel of claim 16 , wherein:
the liner part further comprises a body portion;
an upper end of the body portion is connected to the first contact portion and the second contact portion;
a boundary area between the second contact portion and the body portion defines a second boundary area; and
the second boundary area is rounded along an outer side in the radial direction.
18 . The pressure vessel of claim 16 , wherein:
the nozzle part further comprises:
a first groove recessed downward from an upper surface of the second nozzle portion;
a second groove recessed upward from a lower surface of the second nozzle portion;
a third groove recessed upward from the lower surface of the second nozzle portion and disposed inside the second groove in the radial direction; and
the liner part further comprises:
a first protrusion protruding downward from the first contact portion and inserted into the first groove;
a second protrusion protruding upward from the second contact portion and inserted into the second groove; and
a third protrusion protruding upward from an inner end of the second contact portion in the radial direction and inserted into the third groove.
19 . The pressure vessel of claim 18 , wherein:
the first groove comprises:
a first elongated groove extending downward from the upper surface of the second nozzle portion; and
a second elongated groove extending inward from a lower end of the first elongated groove in the radial direction; and
the second groove comprises:
a first elongated groove extending upward from the lower surface of the second nozzle portion; and
a second elongated groove extending outward from an upper end of the first elongated groove of the second groove in the radial direction.
20 . A pressure vessel comprising:
a nozzle part comprising:
a first nozzle portion; and
a second nozzle portion connected to a lower side of the first nozzle portion and having a second diameter equal or greater than a first diameter of the first nozzle portion, wherein an area of the second nozzle portion adjacent to the first nozzle portion defines a first boundary area, and wherein the second nozzle portion comprises:
a first nozzle area having a diameter that increases toward a lower side; and
a second nozzle area connected to a lower side of the first nozzle area and having a diameter that decreases toward the lower side;
a liner part defining an inner space and surrounding a lower side of the nozzle part, wherein an upper end of the liner part covers the first boundary area; and
a composite material part coupled to an outer side of the liner part and configured to surround the liner part,
wherein a first length, which is a length by which a boundary portion between the first nozzle area and the second nozzle area protrudes from the first nozzle portion in a radial direction of the nozzle part, is smaller than a second length, which is a length of the second nozzle portion in an up-down direction,
wherein the composite material part comprises a winding band having a predetermined width surrounding the liner part, and
wherein the first length is greater than a width of the winding band.