Nitrogen liquefaction storage system for double-end Stirling cryocooler process
By using a dual-head Stirling refrigeration system, nitrogen from the air is liquefied and stored in a seamlessly welded liquid nitrogen tank, solving the problems of inconvenient liquid nitrogen transportation and leakage, and achieving efficient and safe liquid nitrogen storage.
Patent Information
- Application Number
- CN202520554374.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The transportation and storage of liquid nitrogen in the laboratory is inconvenient, and existing liquid nitrogen bottles and tanks are prone to leakage, resulting in environmental pollution and high transportation costs.
The system employs a dual-head Stirling refrigeration process, which cools nitrogen separated from the air to form liquid nitrogen, which is then stored in a seamlessly welded liquid nitrogen tank, reducing transportation requirements and improving sealing.
It enables convenient preparation and efficient storage of liquid nitrogen, reduces transportation costs, avoids liquid nitrogen leakage, and improves storage safety.
Smart Images
Figure CN223882645U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nitrogen liquefied storage field especially relates to a nitrogen liquefied storage system of double -end stirling refrigeration machine technology. BACKGROUND
[0002] Liquid nitrogen refers to inert, colorless, odorless, non-corrosive, non-flammable nitrogen in the environment of extremely low temperature and obtained liquid. Liquid nitrogen is inert, colorless, odorless, low viscosity, non-corrosive, non-flammable, transparent liquid of extremely low temperature, and a large amount of heat absorption is caused when vaporizing, resulting in frostbite. Nitrogen constitutes most of the atmosphere. At normal pressure, the boiling point of nitrogen is -196.56 DEG C, and 1 cubic meter of liquid nitrogen can expand to 696 cubic meters of pure gaseous nitrogen. If pressurized, liquid nitrogen can be obtained at a higher temperature. If the human body contacts liquid nitrogen without protective measures, the skin may be severely frostbitten. If the nitrogen gas generated by vaporization at normal pressure is excessive, it may cause the oxygen partial pressure in the air to drop, causing oxygen deficiency asphyxia.
[0003] At present, when liquid nitrogen is used in the laboratory, the liquid nitrogen bottle and tank containing liquid nitrogen are usually purchased by purchasing, and each order needs to be transported back and forth, which is inconvenient and increases the transportation cost. The liquid nitrogen bottle and tank in storage are also prone to leakage, causing environmental pollution.
[0004] Therefore, it is necessary to invent a nitrogen liquefied storage system of double-end stirling refrigeration machine technology to solve the above problems. SUMMARY
[0005] The utility model discloses a nitrogen liquefied storage system of double-end stirling refrigeration machine technology to solve the problems raised in the background art.
[0006] To achieve the above object, the utility model provides the following technical scheme: a nitrogen liquefied storage system of double-end stirling refrigeration machine technology, including the base, the top of base is connected with liquid nitrogen tank, the top of liquid nitrogen tank is provided with end cover, the seamless welding of end cover and liquid nitrogen tank is set up, the top of end cover is connected with two groups of mounting bracket, each group mounting bracket is installed and is provided with refrigeration machine, the top of end cover is connected with refrigeration pipeline, the refrigeration machine is connected with refrigeration pipeline through flange plate, the lateral wall of refrigeration pipeline is connected with inlet pipe, the top of end cover is connected with liquid nitrogen outlet pipe.
[0007] Preferably, the top of the end cover is connected with a vent, and the vent is connected with a vent valve.
[0008] Preferably, the top of the end cover is provided with a monitoring port, and the monitoring port is connected with a liquid level gauge.
[0009] Preferably, the top of the end cap is provided with a vacuum port, and a threaded sealing cap is connected inside the vacuum port.
[0010] Preferably, the side wall of the refrigeration unit is connected to an inlet pipe and an outlet pipe.
[0011] The technical effects and advantages of this utility model are as follows:
[0012] By introducing nitrogen gas separated from the air into the inlet pipe, and then into the refrigeration pipeline through the inlet pipe, the nitrogen gas is refrigerated by a refrigeration unit connected to the refrigeration pipeline, thus liquefying the nitrogen gas into liquid nitrogen. The liquid nitrogen is then introduced into the liquid nitrogen tank, which can be used directly after nitrogen production, reducing transportation costs. Furthermore, the liquid nitrogen tank and end cap are seamlessly welded, and the liquid nitrogen is directly compressed inside the liquid nitrogen tank, increasing the tank's sealing performance and preventing leakage. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This utility model Figure 1 A schematic diagram of the rear structure;
[0015] Figure 3 This utility model Figure 1 A schematic diagram of the side view structure;
[0016] Figure 4 This utility model Figure 1 A top-view structural diagram.
[0017] In the diagram: 1. Base; 2. Liquid nitrogen tank; 3. End cap; 4. Mounting bracket; 5. Refrigeration unit; 6. Refrigeration pipe; 7. Inlet pipe; 8. Liquid nitrogen outlet pipe; 9. Vent valve; 10. Liquid level gauge; 11. Threaded sealing cap; 12. Water inlet pipe; 13. Water outlet pipe. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] This utility model provides, for example Figures 1-4The nitrogen liquefaction and storage system using a dual-head Stirling refrigerator process, as shown, includes a base 1. A liquid nitrogen tank 2 is connected to the top of the base 1. An end cap 3 is provided on the top of the liquid nitrogen tank 2, and the end cap 3 is seamlessly welded to the liquid nitrogen tank 2. Two sets of mounting brackets 4 are connected to the top of the end cap 3, and a refrigerator 5 is mounted on each set of mounting brackets 4. A refrigeration pipe 6 is connected to the top of the end cap 3. The refrigerator 5 and the refrigeration pipe 6 are connected via flanges. An inlet pipe 7 is connected to the side wall of the refrigeration pipe 6. The top of the end cap 3 is connected to a liquid nitrogen outlet pipe 8. Nitrogen gas separated from the air is introduced into the air inlet pipe 7, and then into the refrigeration pipe 6 through the air inlet pipe 7. The refrigeration unit 5 connected to the refrigeration pipe 6 is used to refrigerate the nitrogen gas, thereby liquefying the nitrogen gas into liquid nitrogen. The liquid nitrogen is introduced into the liquid nitrogen tank 2, which can be used directly after nitrogen production, reducing transportation costs. Furthermore, the liquid nitrogen tank 2 and the end cap 3 are seamlessly welded together, and the liquid nitrogen is directly compressed in the liquid nitrogen tank 2, which increases the sealing performance of the liquid nitrogen tank 2 and prevents leakage.
[0020] The top of the end cap 3 is connected to a vent port, and a vent valve 9 is connected inside the vent port, which can vent the liquid nitrogen in the liquid nitrogen tank 2.
[0021] The top of the end cap 3 is provided with a monitoring port, and a level gauge 10 is connected to the monitoring port, which can conveniently monitor the liquid nitrogen storage amount in the liquid nitrogen tank 2.
[0022] The top of the end cap 3 is provided with a vacuum port, and a threaded sealing cap 11 is connected inside the vacuum port. By removing the threaded sealing cap 11, the liquid nitrogen tank 2 can be evacuated to a vacuum.
[0023] The side wall of the refrigeration unit 5 is connected to an inlet pipe 12 and an outlet pipe 13, which facilitates the cooling of the refrigeration unit 5.
[0024] Working principle of this utility model:
[0025] Nitrogen gas separated from the air is introduced into the air inlet pipe 7, and then into the refrigeration pipe 6 through the air inlet pipe 7. The refrigeration unit 5, which is connected to the refrigeration pipe 6, refrigerates the nitrogen gas, thereby liquefying the nitrogen gas into liquid nitrogen. The liquid nitrogen is then introduced into the liquid nitrogen tank 2, which can be used directly after nitrogen production, reducing transportation costs. Furthermore, the liquid nitrogen tank 2 and the end cap 3 are seamlessly welded together, and the liquid nitrogen is directly compressed inside the liquid nitrogen tank 2, increasing the sealing performance of the liquid nitrogen tank 2 and preventing leakage.
[0026] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. A nitrogen liquefaction storage system for a twin-cylinder Stirling cryogenic process comprising a base, characterized by: The top of the base is connected with a liquid nitrogen tank, the top of the liquid nitrogen tank is provided with an end cover, the end cover and the liquid nitrogen tank are seamlessly welded, the top of the end cover is connected with two groups of mounting racks, each of the mounting racks is provided with a refrigerator, the top of the end cover is connected with a refrigeration pipeline, the refrigerator and the refrigeration pipeline are connected through flanges, the side wall of the refrigeration pipeline is connected with an air inlet pipe, and the top of the end cover is connected with a liquid nitrogen outlet pipe.
2. A two-headed Stirling cryogenic engine process nitrogen liquefaction storage system as claimed in claim 1, wherein: The top of the end cover is connected with a vent, and the vent is connected with a vent valve.
3. A dual-headed Stirling cryogenic engine process nitrogen liquefaction storage system as claimed in claim 1, wherein: The top of the end cover is provided with a monitoring port, and the monitoring port is connected with a liquid level meter.
4. A two-headed Stirling cryogenic engine process nitrogen liquefaction storage system as claimed in claim 1, wherein: The top of the end cover is provided with a vacuum port, and the vacuum port is connected with a threaded sealing cover.
5. A two-headed Stirling cryogenic engine process nitrogen liquefaction storage system as claimed in claim 1, wherein: The side wall of the refrigerator is connected with a water inlet pipe and a water outlet pipe.