CN-117489970-B - Tank

CN117489970BCN 117489970 BCN117489970 BCN 117489970BCN-117489970-B

Abstract

The tank of the present invention comprises a liner, a joint having a communication hole, a metal cylinder inserted into the lower end of the communication hole, and a valve inserted into the communication hole and the lower end of which is inserted into the metal cylinder. The liner has a winding portion wound into the communication hole and contacting the outer peripheral surface of the metal cylinder. A first O-ring is circumferentially disposed between the inner peripheral surface of the wound portion and the outer peripheral surface of the metal cylinder. A second O-ring is disposed circumferentially between the inner peripheral surface of the metal cylinder and the outer peripheral surface of the lower end portion of the valve.

Inventors

TAKATA MASANORI
UCHIMURA CHIHIRO
Nai Cunzhang
NOMURA SHINICHI

Assignees

丰田自动车株式会社

Dates

Publication Date: 20260505
Application Date: 20230615
Priority Date: 20220802

Claims (3)

1. A tank having a cylindrical shape and a storage space for storing a gas, characterized in that, When the outside of the can is set as an upper side and the inside of the can is set as a lower side along the axial direction of the can, the can includes: A resin liner provided with the storage space; a metal joint having a communication hole configured to communicate with the storage space and integrally formed with the liner; a metal cylinder inserted into a lower end portion of the communication hole of the joint and coaxially arranged with the communication hole, and A valve inserted into the communication hole so as to close the joint, the lower end portion of the valve being further inserted into the metal cylinder, Wherein the liner has a winding portion configured to wind from the bottom of the joint into the communication hole and contact with the outer peripheral surface of the metal cylinder, A first O-ring is arranged between the inner peripheral surface of the wound portion and the outer peripheral surface of the metal cylinder along the circumferential direction, A second O-ring is arranged between the inner peripheral surface of the metal cylinder and the outer peripheral surface of the lower end part of the valve along the circumferential direction, A first peripheral groove is arranged on the peripheral surface of the metal cylinder, The first O-ring is disposed in the first peripheral groove, a first gasket disposed on the outside of the can than the first O-ring is fitted into the first peripheral groove, the first O-ring and the first gasket are disposed in the first peripheral groove in a state of close contact, The first gasket is an annular member having a cross-sectional trapezoidal shape, suppresses movement of the first O-ring to the outside of the can, A second peripheral groove is provided in the peripheral surface of the lower end portion of the valve, The second O-ring is disposed in the second peripheral groove, a second gasket disposed on the outside of the can than the second O-ring is fitted into the second peripheral groove, the second O-ring and the second gasket are disposed in the second peripheral groove in a state of close contact, The second gasket is an annular member having a cross-sectional trapezoidal shape, and suppresses movement of the second O-ring to the outside of the can.
2. The tank of claim 1 wherein the tank is configured to hold a liquid, The first O-ring and the second O-ring are located at the same height in the axial direction of the can.
3. A tank as claimed in claim 1 or 2, characterized in that, The metal cylinder is fixed to a lower end portion of the communication hole of the joint by screw-bonding.

Description

Tank Technical Field The present invention relates to cans. Background Conventionally, there is a technology field described in, for example, japanese patent application laid-open publication No. 2019-116926 as such a technology field. The tank described in japanese patent application laid-open publication 2019-116926 includes a resin liner having a space for storing gas therein and an opening communicating with the space, a reinforcing layer formed on an outer peripheral surface of the liner, a joint attached to the opening of the liner, and a valve inserted into the joint. In the tank having such a structure, a sealing structure in which an O-ring is disposed between the joint and the liner is employed in order to prevent leakage of the stored gas. However, in the above-described can, a circumferential groove for fitting the O-ring needs to be provided in the joint, and therefore the structure of the joint becomes complicated. In addition, recently, in order to improve workability and prevent invasion of an epoxy resin between a joint and a liner at the time of formation of a reinforcing layer, there has been attention to integrally molding a resin liner and a joint. However, in the case of integrally molding the liner and the joint, if a circumferential groove for fitting the O-ring is provided in the joint, the joint structure becomes more complicated. Disclosure of Invention The invention provides a can capable of ensuring tightness with a simple structure. One aspect of the present invention provides a canister. The tank is a cylindrical tank having a storage space for storing gas, and when the outside of the tank is set up in the axial direction of the tank and the inside of the tank is set down, the tank is provided with a resin liner, the storage space is provided, a metal joint is provided with a communication hole which is communicated with the storage space and is integrally formed with the liner, a metal cylinder is inserted into the lower end part of the communication hole of the joint and is coaxially arranged with the communication hole, and a valve is inserted into the communication hole in a manner of blocking the joint, the lower end part of the valve is also inserted into the metal cylinder, the liner is provided with a winding part which is wound into the inside of the communication hole from the bottom of the joint and is contacted with the outer circumferential surface of the metal cylinder, a first O-shaped ring is arranged between the inner circumferential surface of the winding part and the outer circumferential surface of the metal cylinder along the circumferential direction, and a second O-shaped ring is arranged between the inner circumferential surface of the metal cylinder and the outer circumferential surface of the lower end part of the valve along the circumferential direction. In the tank of the above-described aspect, the metal cylinder inserted into the lower end portion of the communication hole of the joint is used for the integrally molded liner and joint, the first O-ring is disposed circumferentially between the outer peripheral surface of the metal cylinder and the inner peripheral surface of the wound portion of the liner to ensure the sealing property between the metal cylinder and the liner, and the second O-ring is disposed circumferentially between the inner peripheral surface of the metal cylinder and the outer peripheral surface of the lower end portion of the valve inserted into the metal cylinder to ensure the sealing property between the metal cylinder and the valve. By using the metal cylinder in this way, the sealability between the metal cylinder and the liner and the sealability between the metal cylinder and the valve are achieved, respectively, and therefore, it is not necessary to provide a circumferential groove for fitting an O-ring in the joint as in the prior art, and therefore, the sealability of the can be ensured with a simple structure. In the tank according to the above aspect, the first O-ring and the second O-ring may be located at the same height in the axial direction of the tank. In this way, by adjusting the respective pressing forces of the first O-ring and the second O-ring to be identical in height, the pressing force can be enhanced, and therefore the sealability between the metal cylinder and the liner, and the sealability between the metal cylinder and the valve can be improved. In the tank according to the above aspect, the metal cylindrical body may be fixed to a lower end portion of the communication hole of the joint by screw-coupling. In this way, the metal cylinder can be easily and reliably inserted into and fixed to the lower end portion of the communication hole of the joint, as compared with a press-fitting method or the like. Further, since the metal cylinder is detachably fixed to the lower end portion of the communication hole, the metal cylinder can be removed and replaced even if the insertion into the communica