Rapid pre-cooling and drying device for liquid nitrogen tank

Abstract

The utility model discloses a liquid nitrogen tank fast precooling and drying device, including base, air compressor, vortex refrigerator and air outlet pipe, the air compressor is provided on one side of base through first support, vortex refrigerator is provided inside base through second support, and the cold end outlet of vortex refrigerator is provided upward, and the air outlet pipe is provided with the air outlet pipe. The hot end outlet faces downwards, the compressed air inlet faces the side face of the base, the air outlet pipe is vertically arranged, the bottom end of the air outlet pipe is connected with the cold end outlet through a pipe joint, the air compressor is connected with the compressed air inlet through a pipeline penetrating through the side wall of the base, and a butt joint opening is formed in the top of the base. High-pressure gas is provided for the vortex refrigerator through the air compressor, the vortex refrigerator converts the high-pressure gas into low-temperature gas, and the low-temperature gas is discharged into the liquid nitrogen tank through the air outlet pipe, so that the interior of the tank body is pre-cooled and dried, excessive manual intervention is not needed, and the pre-cooling and drying efficiency of the liquid nitrogen tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen filling, in particular to a rapid pre-cooling and drying device for a liquid nitrogen tank. Background Art

[0002] Liquid nitrogen is a colorless, odorless, non-toxic gas that condenses into a liquid at normal pressure. Its very low boiling point allows it to provide an extremely low temperature environment, making it a common cooling medium in industry. In metal processing and welding, liquid nitrogen can be used as a coolant to control metal temperature and reduce thermal deformation. It can also be used for quenching and tempering to increase the hardness and strength of metals.

[0003] During the storage and transportation of liquid nitrogen, it is generally stored in dedicated liquid nitrogen tanks. After the liquid nitrogen is produced, it is poured into the liquid nitrogen tank by manual pouring or liquid nitrogen pump. The tank body needs to be pre-cooled and dried before filling the liquid nitrogen. Otherwise, high temperature, water droplets or water vapor will cause ice blockage in the pipeline, affecting the pressure increase and infusion.

[0004] At present, the drying method for liquid nitrogen tanks in the industry is to use a blower to dry them, and pre-cooling is to slowly input a small amount of liquid nitrogen to lower the temperature of the tank. However, the above drying and pre-cooling methods are all done manually, and the operating efficiency is extremely low, so there is room for improvement. Utility Model Content

[0005] To solve the above problems, the utility model provides a liquid nitrogen tank rapid pre-cooling and drying device, comprising a base, an air compressor, a vortex refrigerator and an air outlet pipe, wherein the air compressor is arranged on one side of the base through a first bracket, the vortex refrigerator is arranged inside the base through a second bracket, and the cold end outlet of the vortex refrigerator is arranged upward, the hot end outlet is arranged downward, and the compressed gas inlet is arranged toward the side of the base, the air outlet pipe is arranged vertically and is partially located inside the base and partially located outside the base, the bottom end of the air outlet pipe is connected to the cold end outlet through a pipe joint, the air compressor is connected to the compressed gas inlet through a pipe running through the side wall of the base, and a docking port is provided on the top of the base.

[0006] Furthermore, a plurality of air outlet holes are provided at intervals on the outer wall of the air outlet pipe.

[0007] Furthermore, the docking port has an inverted cone-shaped structure, and a rubber pad is provided on its inner wall.

[0008] Furthermore, an air outlet cover is provided at the bottom inner side of the base, the hot end outlet is connected to the air outlet cover, and the outer wall of the air outlet cover is provided with a plurality of air outlets connected to the outside world.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model provides high-pressure gas to the vortex refrigerator through an air compressor, and the vortex refrigerator converts the high-pressure gas into low-temperature gas and discharges it into the interior of the liquid nitrogen tank through an air outlet pipe, thereby pre-cooling and drying the interior of the tank without excessive human intervention, thereby improving the pre-cooling and drying efficiency of the liquid nitrogen tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional view of the overall structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the use state of the utility model.

[0013] In the figure: 1-base, 11-docking port, 12-rubber pad, 2-air compressor, 3-vortex cooler, 31-cold end outlet, 32-hot end outlet, 33-compressed gas inlet, 4-air outlet pipe, 41-air outlet hole, 42-pipe joint, 5-first bracket, 6-second bracket, 7-air outlet cover, 71-air outlet. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] like Figure 1 As shown, the liquid nitrogen tank rapid precooling and drying device in this embodiment includes a base 1, an air compressor 2, a vortex refrigerator 3 and an air outlet pipe 4. The air compressor 2 is arranged on one side of the base 1 through a first bracket 5, and the vortex refrigerator 3 is arranged inside the base 1 through a second bracket 6. The cold end outlet 31 of the vortex refrigerator 3 is arranged upward, the hot end outlet 32 is arranged downward, and the compressed gas inlet 33 is arranged toward the side of the base 1; wherein, the air compressor 2 and the vortex refrigerator 3 both adopt the existing technology in the field, such as the air compressor 2 can adopt the GAST-1HA series small air compressor, and the vortex refrigerator 3 can adopt the Nex Flow-AM40 series vortex refrigerator.

[0016] The air outlet pipe 4 is vertically arranged and is partially located inside the base 1 and partially located outside the base 1. A plurality of air outlet holes 41 are spaced apart on the outer wall of the air outlet pipe 4. The bottom end of the air outlet pipe 4 is connected to the cold end outlet 31 through a pipe joint 42.

[0017] The air compressor 2 is connected to the compressed air inlet 33 through a pipe 21 that passes through the side wall of the base 1. An air outlet hood 7 is provided at the bottom inner side of the base 1. The hot end outlet 32 is connected to the air outlet hood 7. The outer wall of the air outlet hood 7 is provided with several air outlets 71 that are connected to the outside world.

[0018] A docking port 11 is provided on the top of the base 1 . The docking port 11 is in an inverted cone-shaped structure, and a rubber pad 12 is provided on the inner wall of the docking port 11 .

[0019] like Figure 2 As shown, when the present invention is used, the liquid nitrogen tank is placed upside down on the docking port 11. The inverted cone-shaped docking port 11 can adapt to liquid nitrogen tanks of different sizes, and the rubber pad 12 plays an anti-slip role.

[0020] The air compressor 2 supplies high-pressure gas from the compressed gas inlet 33 to the vortex cooler 3. The vortex cooler 3 expands and accelerates the high-pressure gas, which then enters the cylindrical vortex generator inside. The rotating airflow, at a speed of 1,000,000 rpm, flows along the heat pipe wall and into the interior. The vortex exchange within the heat pipe separates energy, splitting the airflow into two streams: one hot and one cold. At the heat pipe's terminal, a portion of the compressed air is discharged through the hot-end outlet 32, while the remaining compressed air returns at a lower speed through the center of the heat pipe's rotating airflow. This cold airflow passes through the center of the generator, forming ultra-low-temperature cold air that converges and is discharged at the cold-end outlet 31. The discharged cold air can reach a temperature of -60°C to -70°C.

[0021] The low-temperature cold air is blown to the surroundings at high speed through the air outlet 41 of the air outlet pipe 4, precooling the interior of the liquid nitrogen tank while drying it. After the precooling and drying are completed, the liquid nitrogen tank can be removed.

[0022] The utility model realizes automatic pre-cooling and drying of the liquid nitrogen tank without excessive human intervention, thereby improving the pre-cooling and drying efficiency of the liquid nitrogen tank.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid nitrogen tank rapid precooling and drying device, characterized by: It includes a base, an air compressor, a vortex cooler and an air outlet pipe. The air compressor is arranged on one side of the base through a first bracket, and the vortex cooler is arranged inside the base through a second bracket. The cold end outlet of the vortex cooler is arranged upward, the hot end outlet is arranged downward, and the compressed air inlet is arranged toward the side of the base. The air outlet pipe is arranged vertically and is partially located inside the base and partially located outside the base. The bottom end of the air outlet pipe is connected to the cold end outlet through a pipe joint, and the air compressor is connected to the compressed air inlet through a pipe running through the side wall of the base. A docking port is provided on the top of the base.

2. The liquid nitrogen tank rapid precooling and drying device according to claim 1, characterized in that: A plurality of air outlet holes are arranged at intervals on the outer wall of the air outlet pipe.

3. The liquid nitrogen tank rapid precooling and drying device according to claim 1, characterized in that: The docking port is in an inverted cone-shaped structure, and a rubber pad is provided on the inner wall of the docking port.

4. The liquid nitrogen tank rapid precooling and drying device according to claim 1, characterized in that: An air outlet cover is provided at the bottom inner side of the base, the hot end outlet is connected to the air outlet cover, and the outer wall of the air outlet cover is provided with a plurality of air outlets communicating with the outside world.

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