Low-temperature adiabatic gas cylinder vacuum system

Abstract

This utility model discloses a cryogenic insulated gas cylinder vacuum system, including a cryogenic insulated gas cylinder and a vacuum docking valve. The vacuum docking valve includes an inlet pipe, an outlet pipe, and a water absorption component. The inlet pipe is connected to and communicates with the vacuum interface of the cryogenic insulated gas cylinder, and the outlet pipe communicates with the inlet pipe and is used to communicate with a vacuuming device. The water absorption component is disposed inside the inlet pipe and located between the vacuum interface and the outlet pipe. The water absorption component includes an air extraction channel and a water absorption channel, and the water absorption channel is provided with water-absorbing material. In this application, the water absorption component is provided with independent air extraction channels and water absorption channels. During air extraction, the airflow does not pass through the water-absorbing material in the water absorption channel, thus extending the service life of the water-absorbing material without affecting the air extraction. After the air extraction is completed, the airflow can only flow through the water absorption channel, ensuring the adsorption effect of the water absorption component on the moisture in the interlayer.

Description

Technical Field

[0001] This application relates to containers for holding or storing compressed, liquefied, or solidified gases; fixed-capacity gas storage tanks; and the technical field of filling or discharging compressed, liquefied, or solidified gases into or from containers, specifically to a cryogenic insulated gas cylinder vacuum system. Background Technology

[0002] Cryogenic insulated gas cylinders are core equipment for storing cryogenic media (such as liquid nitrogen and liquid oxygen), and the insulation performance of their vacuum jacket directly determines the storage efficiency and safety of the media. In existing technologies, the vacuum jacket's vacuum treatment system is typically connected to an external vacuum pump unit via a vacuum docking valve, and a water-absorbing mechanism is installed in the vacuum pipeline to intercept water vapor and prevent it from seeping back into the vacuum jacket during the vacuuming process, thus reducing the vacuum level. For example, utility model patent CN217951946U describes a cryogenic insulated gas cylinder vacuum treatment system, including a cryogenic insulated gas cylinder, a vacuum docking valve, and a vacuum pipeline. The top of the cryogenic insulated gas cylinder has a vacuum interface communicating with the vacuum jacket inside the cylinder. The vacuum docking valve includes a valve body with an outlet pipe for connecting to the vacuum pipeline and an inlet pipe for connecting to the vacuum interface. The outlet pipe and the inlet pipe are connected, and the inlet pipe contains a water-absorbing mechanism.

[0003] The water absorption mechanism described in the aforementioned patent document uses a cylindrical absorbent tube made of absorbent material located inside the cavity of the air inlet pipe. The absorbent tube can absorb water vapor and prevent water vapor from flowing back into the vacuum interlayer. However, the absorbent tube is a cylindrical structure made of absorbent paper or absorbent cotton, which is set tightly against the inner wall of the air inlet pipe. Although it can absorb moisture near the pipe wall through capillary action, due to its structural limitations, the cylindrical absorbent material only covers the annular area of ​​the air inlet pipe, and the water vapor carried by the airflow in the center of the cavity cannot be effectively intercepted, thus failing to effectively prevent water vapor from flowing back. At the same time, during the vacuuming process, the residual moisture in the vacuum interlayer evaporates after being heated. It should be directly discharged to the external vacuum pump unit through the air outlet pipe. However, the open structure of the aforementioned water absorption mechanism forces all the airflow to pass through the absorbent material, causing the moisture that should have been discharged to be repeatedly absorbed, resulting in unnecessary wear and tear on the water absorption mechanism and affecting its service life. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a cryogenic insulated gas cylinder vacuum system, the technical solution of which includes:

[0005] A cryogenic insulated gas cylinder vacuum system includes a cryogenic insulated gas cylinder and a vacuum docking valve. The vacuum docking valve includes an inlet pipe, an outlet pipe, and a water absorption assembly. The inlet pipe is connected to and communicates with the vacuum interface of the cryogenic insulated gas cylinder. The outlet pipe communicates with the inlet pipe and is used to communicate with a vacuuming device. The water absorption assembly is disposed inside the inlet pipe and located between the vacuum interface and the outlet pipe. The water absorption assembly includes a vacuum channel and a water absorption channel, and the water absorption channel is provided with water-absorbing material.

[0006] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the water absorption assembly includes a mounting ring, a piston, and an elastic element. The mounting ring is installed inside the air inlet pipe and is in sealed contact with the inner wall of the air inlet pipe. The air extraction channel and the water absorption channel are arranged on the mounting ring, and one end of the air extraction channel and the water absorption channel are connected to the inside of the mounting ring, and the other end is connected to the side of the mounting ring away from the vacuum interface. The piston is installed inside the mounting ring through the elastic element and blocks one end of the air extraction channel. The piston is provided with a water absorption and air guiding channel. One side of the water absorption and air guiding channel penetrates the side wall of the piston, and the other end penetrates the side of the piston away from the vacuum interface. The piston can move along the axial direction of the mounting ring and communicate with the water absorption channel or the air extraction channel.

[0007] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the piston has an annular notch in the middle, the elastic element is disposed at the annular notch, and the two ends of the elastic element are respectively connected to the piston and the mounting ring.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is characterized in that the mounting ring includes an annular body and a mesh cover, the water absorption channel and the air extraction channel are both installed on the annular body, and the mesh cover is detachably installed on the annular body and covers the other end of the water absorption channel.

[0009] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the mesh cover is located on the side of the annular body close to the vacuum port.

[0010] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the vacuum docking valve further includes a ferrule interface, a ferrule installed at the ferrule interface, and a sealing gasket disposed in the ferrule. The vacuum docking valve can connect the ferrule interface with the vacuum interface and abut against the sealing gasket through the ferrule.

[0011] The beneficial effects of this utility model are as follows: In this application, an independent air extraction channel and a water absorption channel are provided on the water absorption component. When air is extracted, the airflow does not pass through the water absorption material in the water absorption channel, thus extending the service life of the water absorption material without affecting the air extraction. After the air extraction is completed, the airflow can only flow through the water absorption channel, ensuring the adsorption effect of the water absorption component on the water vapor in the interlayer. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0013] Figure 1 This is a schematic diagram of the structure of the cryogenic insulated gas cylinder vacuum system described in the embodiments of this application;

[0014] Figure 2 This is a cross-sectional view of the cryogenic insulated gas cylinder vacuum system described in the embodiments of this application. Figure 1 ;

[0015] Figure 3 This is a cross-sectional view of the cryogenic insulated gas cylinder vacuum system described in the embodiments of this application. Figure 2 . Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Reference Figure 1-3 This application proposes an embodiment of a cryogenic insulated gas cylinder vacuum system, characterized in that it includes a cryogenic insulated gas cylinder 10 and a vacuum docking valve 20. The vacuum docking valve 20 includes an inlet pipe 21, an outlet pipe 22, and a water absorption component 23. The inlet pipe 21 is connected to and communicates with the vacuum interface 11 of the cryogenic insulated gas cylinder 10. The outlet pipe 22 communicates with the inlet pipe 21 and is used to communicate with a vacuuming device. The water absorption component 23 is disposed inside the inlet pipe 21 and located between the vacuum interface 11 and the outlet pipe 22. The water absorption component 23 includes a vacuum channel 231 and a water absorption channel 232. The water absorption channel 232 is provided with a water-absorbing material 233, which is absorbent paper or absorbent resin.

[0021] In this embodiment, refer to the appendix. Figure 1 As shown, when the vacuuming device generates negative pressure in the air inlet pipe 21, the air extraction channel 231 is opened and the water absorption channel 232 is closed. At this time, the vacuuming device can perform normal vacuuming on the cryogenic insulation cylinder 10.

[0022] After the vacuuming of the cryogenic insulation cylinder 10 is completed, the vacuuming channel 231 is closed and the water absorption channel 232 is opened. When water vapor flows back, the water-absorbing material 233 can fully absorb the water vapor, ensuring the contact effect between the water-absorbing material 233 and the airflow, thereby effectively absorbing the water vapor in the airflow and preventing water vapor from flowing back into the vacuum interlayer, thus avoiding the water vapor from affecting the insulation effect of the cryogenic insulation cylinder 10.

[0023] In this application, independent air extraction channels 231 and water absorption channels 232 are provided on the water absorption component 23. During air extraction, the airflow does not pass through the water absorption material 233 in the water absorption channel 232, which helps to extend the service life of the water absorption material 233 without affecting the air extraction. After the air extraction is completed, the airflow can only flow through the water absorption channel 232, ensuring the adsorption effect of the water absorption component 23 on the water vapor in the interlayer.

[0024] Specifically, the water absorption assembly 23 includes a mounting ring 234, a piston 235, and an elastic element 236. The mounting ring 234 is installed inside the air inlet pipe 21 and is in sealed contact with the inner wall of the air inlet pipe 21. The air extraction channel 231 and the water absorption channel 232 are disposed on the mounting ring 234, with one end of the air extraction channel 231 and the water absorption channel 232 communicating with the inside of the mounting ring 234, and the other end communicating with the side of the mounting ring 234 opposite to the vacuum interface 11. The piston 235 is mounted inside the mounting ring 234 via an elastic element 236 and blocks one end of the suction channel 231. The piston 235 is provided with a water suction and air guide channel 2351. One side of the water suction and air guide channel 2351 penetrates the side wall of the piston 235, and the other end penetrates the side of the piston 235 away from the vacuum port 11. The piston 235 can move along the axial direction of the mounting ring 234 and communicate with the water suction channel 232 or the suction channel 231.

[0025] In this embodiment, when the vacuuming equipment evacuates the cryogenic insulated gas cylinder 10, the vacuuming equipment generates negative pressure, causing the piston 235 to overcome the elastic tension of the elastic element 236 and move away from the vacuuming interface 11 until the water absorption and air guiding channel 2351 is connected to the air extraction channel 231. At this time, the water absorption channel 232 is closed.

[0026] After the air extraction stops, the air pressure returns to normal. Under the restoring force of the elastic element 236, the piston 235 returns to its original position and blocks the air extraction channel 231. Then, the water absorption and air guiding channel 2351 is connected to the water absorption channel 232.

[0027] Preferably, the piston 235 has an annular notch 2352 in the middle, and the elastic element 236 is disposed at the annular notch 2352, with both ends of the elastic element 236 connected to the piston 235 and the mounting ring 234 respectively. This structural design ensures a tight seal between the piston 235 and the mounting ring 234, preventing water vapor from flowing back between the piston 235 and the inner wall of the mounting ring 234, thus guaranteeing effective water absorption.

[0028] Specifically, the mounting ring 234 includes an annular body 2341 and a mesh cover 2342. Both the water absorption channel 232 and the air extraction channel 231 are mounted on the annular body 2341. The mesh cover 2342 is detachably mounted on the annular body 2341 and covers the other end of the water absorption channel 232. The mesh cover 2342 has mesh holes, which allow the water absorption channel 232 to communicate with the air inlet pipe 21 while preventing the absorbent material 233 from spilling out of the water absorption channel 232.

[0029] Preferably, the mesh cover 2342 is located on the side of the annular body 2341 closest to the vacuum port 11. Referring to the accompanying drawings, after the vacuum connection valve 20 is removed from the vacuum port 11, the mesh cover 2342 can be removed to replace the absorbent material 233, facilitating maintenance of the vacuum connection valve 20. The mesh cover 2342 can be detachably installed on the annular body 2341 using fasteners, snap-fit ​​connections, or other methods.

[0030] Preferably, the vacuum docking valve further includes a ferrule interface 237, a ferrule 238 installed at the ferrule interface 237, and a sealing gasket 239 disposed within the ferrule 238. The vacuum docking valve can connect the ferrule interface 237 to the vacuum interface 11 and abut against the sealing gasket 239 through the ferrule 238.

[0031] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A cryogenic insulated gas cylinder vacuum system, characterized in that, The system includes a cryogenic insulated gas cylinder (10) and a vacuum docking valve (20). The vacuum docking valve (20) includes an inlet pipe (21), an outlet pipe (22), and a water absorption assembly (23). The inlet pipe (21) is connected to and communicates with the vacuum interface (11) of the cryogenic insulated gas cylinder (10). The outlet pipe (22) communicates with the inlet pipe (21) and is used to communicate with a vacuuming device. The water absorption assembly (23) is disposed in the inlet pipe (21) and located between the vacuum interface (11) and the outlet pipe (22). The water absorption assembly (23) includes a vacuuming channel (231) and a water absorption channel (232). The water absorption channel (232) is provided with water-absorbing material (233).

2. The cryogenic insulated gas cylinder vacuum system according to claim 1, characterized in that, The water absorption assembly (23) includes a mounting ring (234), a piston (235), and an elastic element (236). The mounting ring (234) is installed inside the air inlet pipe (21) and is in sealed contact with the inner wall of the air inlet pipe (21). The air extraction channel (231) and the water absorption channel (232) are arranged on the mounting ring (234), and one end of the air extraction channel (231) and the water absorption channel (232) communicates with the inside of the mounting ring (234), and the other end communicates with the side of the mounting ring (234) away from the vacuum interface (11). The piston (235) is mounted inside the mounting ring (234) via an elastic element (236) and blocks one end of the suction channel (231). The piston (235) is provided with a water absorption and air guiding channel (2351). One side of the water absorption and air guiding channel (2351) penetrates the side wall of the piston (235), and the other end penetrates the side of the piston (235) away from the vacuum port (11). The piston (235) can move along the axial direction of the mounting ring (234) and communicate with the water absorption channel (232) or the suction channel (231).

3. The cryogenic insulated gas cylinder vacuum system according to claim 2, characterized in that, The piston (235) has an annular notch (2352) in the middle, and the elastic element (236) is disposed at the annular notch (2352), and the two ends of the elastic element (236) are respectively connected to the piston (235) and the mounting ring (234).

4. The cryogenic insulated gas cylinder vacuum system according to claim 2 or 3, characterized in that, The mounting ring (234) includes an annular body (2341) and a mesh cover (2342). The water absorption channel (232) and the air extraction channel (231) are both installed on the annular body (2341). The mesh cover (2342) is detachably installed on the annular body (2341) and covers the other end of the water absorption channel (232).

5. The cryogenic insulated gas cylinder vacuum system according to claim 4, characterized in that, The mesh cover (2342) is located on the side of the annular body (2341) close to the vacuum port (11).

6. The cryogenic insulated gas cylinder vacuum system according to claim 1, characterized in that, The vacuum docking valve further includes a ferrule interface (237), a ferrule (238) installed at the ferrule interface (237), and a sealing gasket (239) disposed in the ferrule (238). The vacuum docking valve can connect the ferrule interface (237) with the vacuum interface (11) and abut against the sealing gasket (239) through the ferrule (238).

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