[0025] Example 1
[0026] See figure 1 , This embodiment provides a cryogenic container 1, including an outer shell 11 and an inner tank 12 arranged inside the outer shell 11. The inner tank 12 is used to contain cryogenic medium, and an interlayer is also provided between the outer shell 11 and the inner tank 12 13. Further, the cryogenic container 1 of this embodiment further includes a pressurizing passage 14 which includes a hollow medium channel 141 for medium to circulate.
[0027] Specifically, the pressurizing passage 14 of this embodiment is connected to the outer casing 11, and the pressurizing passage 14 surrounds the outer casing 11 in the circumferential direction and is distributed along the axial direction of the outer casing 11. In this embodiment, the inlet of the medium channel 141 communicates with the liquid phase space 121 of the inner tank 12, and the outlet of the media channel 141 communicates with the gas phase space 122 of the inner tank 12.
[0028] For the cryogenic container 1 of this embodiment, the inlet and outlet of the medium channel 141 are respectively communicated with the liquid phase space 121 and the gas phase space 122 of the inner tank 12. In the working state, the pressure of the liquid phase space 121 in the inner tank 12 is greater than the pressure of the gas phase space 122, and the cryogenic liquid in the inner tank 12 will enter the medium channel 141 of the booster passage 14 under the action of the pressure difference. At the same time, because the pressurizing passage 14 is connected to the outer shell 11, the temperature of the internal medium channel 141 is consistent with the temperature of the external environment, which is higher than the temperature of the low-temperature liquid, so the low-temperature liquid medium is heated and vaporized, and the vaporized medium enters the inner tank 12 In the gas phase space 122, the purpose of self-pressurization in the inner tank 12 is achieved.
[0029] Therefore, the low-temperature container 1 of this embodiment can realize the pressurization of the inner tank 12 to obtain the low-temperature medium in the inner tank 12 without requiring an external pressurizing device. The low-temperature container 1 has low self-pressurization cost, does not require additional energy consumption, and can also avoid leakage of internal media, ensuring the overall safety of the equipment; meanwhile, in this embodiment, the low-temperature container 1 eliminates the external pressurization device. This not only increases the piping space of the container, but also reduces the weight of the equipment itself; in addition, the pressurizing passage 14 that surrounds the outer casing 11 and extends axially along the outer casing 11 can also act as a reinforcing ring, thereby increasing the low temperature The overall structural strength of the container 1.
[0030] Further, in this embodiment, the cryogenic container 1 has a liquid phase pipeline 15 and a gas phase pipeline 16. The liquid phase pipeline 15 extends from the outside of the cryogenic container 1 into the liquid phase space 121 of the inner tank 12. The pipeline 16 extends from the outside of the cryogenic container 1 into the gas phase space 122 of the inner tank 12. The inlet of the medium channel 141 communicates with the liquid phase space 121 of the inner tank 12 through the liquid phase pipeline 15, and the outlet of the media channel 141 communicates with the gas phase space 122 of the inner tank 12 through the gas phase pipeline 16. Using the pipeline of the cryogenic container 1 to perform the pressurization operation can avoid excessive pipeline arrangements and simplify the structure of the cryogenic container 1.
[0031] Specifically, the liquid phase pipeline 15 of this embodiment includes an inner liquid pipe 151 located in the liquid phase space 121 of the inner tank 12, an outer liquid pipe 152 located outside the outer shell 11, and an outer liquid pipe 152 arranged in the interlayer 13 and connected to the inner and outer layers. The interlayer liquid pipe 153 between the liquid pipes (151, 152), and the outer liquid pipe 152 communicate with the inlet of the medium channel 141.
[0032] The gas-phase pipeline 16 of this embodiment includes an inner gas pipe 161 located in the gas phase space 122 of the inner tank 12, an outer gas pipe 162 located outside the outer shell 11, and one of the inner and outer gas pipes (161, 162) arranged in the interlayer 13 and connected The interlayer air pipe 163 and the outer air pipe 162 communicate with the outlet of the medium channel 141.
[0033] The outer liquid pipe 152 and the outer air pipe 162 are both arranged outside the outer casing 11. In this embodiment, the communication portion between the pressurizing passage 14 and the outer liquid pipe 152 and the outer air pipe 162 is located outside the outer casing 11. On the one hand, this arrangement can facilitate the installation, arrangement, inspection and modification of the pipeline, and on the other hand, it can also avoid damage to the tightness of the cryogenic container 1 itself.
[0034] Preferably, both the outer liquid pipe 152 and the outer gas pipe 162 of this embodiment are provided with a shut-off valve 18 to control the liquid medium in the liquid phase space 121 in the inner tank 12 to enter the pressurizing passage 14 and control the pressurization The gasified gas medium in the passage 14 enters the gas phase space 122 of the inner tank 12.
[0035] In addition, the pressurizing passage 14 of this embodiment is in communication with the outer liquid pipe 152 and the outer air pipe 162 through the connecting member 17. The connecting member 17 is provided with a first connecting hole, a second connecting hole, and a sealing channel located inside the connecting member 17 to communicate with the first connecting hole and the second connecting hole.
[0036] In this embodiment, the two connecting members 17 are both fixed on the outer casing 11, so as to ensure the structural strength of the connection between the pressurizing passage 14 and the outer liquid pipe 152 and the outer air pipe 162.
[0037] Further, for the connecting piece 17 between the pressurizing passage 14 and the outer liquid pipe 152, the first connecting hole is connected with the inlet of the medium channel 141, and the second connecting hole is connected with the outer liquid pipe 152, so that the medium The inlet of the channel 141 communicates with the outer liquid pipe 152. For the connecting piece 17 between the pressurizing passage 14 and the outer air pipe 162, the first connecting hole is connected with the outlet of the medium channel 141, and the second connecting hole is connected with the outer air pipe 162, so that the outlet of the medium channel 141 is connected with The outer trachea 162 is in communication.
[0038] Such as figure 1 As shown, the pressurizing passage 14 of this embodiment is attached to the outer surface of the outer shell 11, and the pressurizing passage 14 is in a continuous spiral shape along the axial direction of the outer shell 11. Therefore, the pressure-increasing passage 14 can play a role of structural reinforcement in the axial and circumferential directions of the outer shell 11, so that the arrangement of the reinforcement ring can be eliminated on the cryogenic container 1 and the purpose of simplifying the structure of the cryogenic container 1 is achieved. In some other preferred embodiments, the pressurizing passage 14 can also be attached to the inner surface of the outer shell 11.
[0039] Further, the cross-section of the pressurizing passage 14 of this embodiment can have various shapes, such as figure 2 As shown, the cross-section of the pressurizing passage 14 is circular, the outer wall of the pressurizing passage 14 is tangent to the outer surface of the outer casing 11, and the inside of the pressurizing passage 14 forms a medium channel 141 for medium circulation.
[0040] Such as image 3 As shown, the cross section of the pressurizing passage 14 is arc-shaped, and the open end of the pressurizing passage 14 faces the outer shell 11. Specifically, the open end surface of the pressurizing passage 14 is fixedly connected to the outer surface of the outer casing 11, so that the pressurizing passage 14 and the outer casing 11 are jointly enclosed to form a medium channel 141 for medium to circulate.
[0041] In addition, see Figure 5 , The cross section of the pressurizing passage 14 may also be groove-shaped. The opening end surface of the groove-shaped pressurizing passage 14 is fixedly connected with the outer surface of the outer shell 11 to enclose a medium channel 141.
[0042] In this embodiment, the inner tank 12, the outer shell 11, and the pressurizing passage 14 are all made of low temperature resistant materials, and the low temperature resistant materials are usually stainless steel.
