Device for reducing vaporization emptying of liquid nitrogen storage tank

Abstract

The utility model is applicable to the technical field of liquid nitrogen storage, and provides a device for reducing vaporization emptying of a liquid nitrogen storage tank, which comprises a liquid nitrogen storage tank body fixedly provided with a liquid inlet pipe and a liquid outlet pipe, the two sealing covers are respectively arranged on the liquid inlet pipe and the liquid outlet pipe; the storage box is fixedly mounted on the liquid nitrogen storage tank body; the blow-down pipe is fixedly mounted on the liquid nitrogen storage tank body and extends into the storage box; the pressure valve is arranged on the blow-down pipe; and the nitrogen utilization mechanism is arranged on the liquid nitrogen storage tank body and used for recycling and reusing nitrogen, and the nitrogen utilization mechanism and the storage box are correspondingly arranged. According to the device for reducing vaporization emptying of the liquid nitrogen storage tank, vaporization emptying nitrogen can be collected and reused, and meanwhile more vaporized liquid nitrogen generated by repeated feeding and discharging is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid nitrogen storage, and in particular relates to a device for reducing vaporization and emptying of a liquid nitrogen storage tank. Background Art

[0002] Liquid nitrogen storage tanks are widely used in scientific research, physics, medicine, bioengineering, chemical industry, food, metallurgy, petroleum, batteries, artificial boards and other fields. They can provide users with a high-precision, controlled, and temperature-uniform ultra-low temperature environment. They are ideal research and development equipment for research departments such as testing and chemical analysis, colleges and universities, factory laboratories, and metrology and quality inspection departments. During the storage process, liquid nitrogen is affected by factors such as the external environment. Liquid nitrogen will vaporize in the storage tank and cause the pressure in the storage tank to increase. In order to maintain a certain pressure in the storage tank and avoid safety accidents, the liquid nitrogen storage tank needs to discharge a certain amount of nitrogen through the vent valve at regular intervals. However, regular and quantitative nitrogen venting will lead to certain waste. Therefore, staff usually purchase nitrogen recovery equipment to recover nitrogen and reduce expenses.

[0003] However, in the actual use of the liquid nitrogen storage tank, since the storage tank needs to feed and discharge liquid nitrogen, the temperature and pressure changes generated during the feeding and discharging process can easily cause the liquid nitrogen to vaporize, and the recovery and reuse of nitrogen will consume certain electricity expenses, etc. It is difficult for the device to reduce the vaporization amount of liquid nitrogen when the external environment changes, and the recovery cost increases. Utility Model Content

[0004] The utility model provides a device for reducing vaporization and emptying of a liquid nitrogen storage tank, aiming to solve the problem proposed in the above background technology that during the vaporization and emptying process of the currently used liquid nitrogen storage tank, due to the need for re-conversion, the recovery cost increases, and it is difficult to reduce the vaporization amount of nitrogen during the recovery process.

[0005] To solve the above problems, the utility model is implemented as follows: a device for reducing vaporization and emptying of a liquid nitrogen storage tank, comprising: a liquid nitrogen storage tank body fixedly mounted with a liquid inlet pipe and a liquid discharge pipe; two sealing covers, which are respectively arranged on the liquid inlet pipe and the liquid discharge pipe; a storage box, which is fixedly mounted on the liquid nitrogen storage tank body; a venting pipe, which is fixedly mounted on the liquid nitrogen storage tank body and extends to the inside of the storage box; a pressure valve, which is arranged on the venting pipe; a nitrogen utilization mechanism, which is arranged on the liquid nitrogen storage tank body for recovering and reusing nitrogen, and the nitrogen utilization mechanism is arranged corresponding to the storage box.

[0006] Preferably, the nitrogen utilization mechanism includes a processing box, a connecting pipe, a regulating valve and a sealing mechanism, the processing box is fixedly mounted on the liquid nitrogen storage tank body, the connecting pipe is fixedly mounted on the storage box and extends into the processing box, the regulating valve is arranged on the connecting pipe, and the sealing mechanism is arranged on the processing box for sealing nitrogen.

[0007] Preferably, the sealing mechanism includes a sealing door, a lock and a sealing gasket, the sealing door is hinged on the processing box, the lock is arranged on the processing box and corresponds to the sealing door, the sealing gasket is fixedly installed on the sealing door, and the sealing gasket is in conflict with the processing box.

[0008] Preferably, a storage mechanism is provided in the processing box for placing items that need to be frozen with liquid nitrogen, and the storage mechanism includes a limit seat, a containing box, four mounting seats and two handles. The limit seat is fixedly installed in the processing box, the containing box is arranged on the limit seat, the four mounting seats are all fixedly installed in the containing box, and the two handles are respectively hinged on the four mounting seats.

[0009] Preferably, support legs are fixedly mounted on the liquid nitrogen storage tank body and the processing box, and there are a plurality of support legs.

[0010] Preferably, a liquid level gauge is provided on the liquid nitrogen storage tank body, and valves are fixedly installed on the liquid inlet pipe and the liquid discharge pipe.

[0011] Preferably, the liquid nitrogen storage tank body, storage box and processing box all adopt a double-layer vacuum insulation structure with high-efficiency thermal insulation performance.

[0012] Compared with the related art, the device for reducing the vaporization and emptying of the liquid nitrogen storage tank provided by the utility model has the following beneficial effects:

[0013] Compared with the prior art, the device for reducing the vaporization and venting of the liquid nitrogen storage tank provided by this solution adopts a double-layer vacuum insulation structure, which significantly improves the thermal insulation performance of the liquid nitrogen storage tank body, storage box and processing box, thereby effectively slowing down the evaporation rate of liquid nitrogen and extending its storage time. At the same time, by adding a nitrogen utilization mechanism, the effective recovery and reuse of nitrogen is achieved, which not only improves the efficiency of resource utilization, but also reduces production costs and energy consumption. In addition, the setting of the liquid level meter and the valve makes the storage, liquid filling, liquid discharge and nitrogen recovery processes of liquid nitrogen more controllable and safe. On the whole, this device realizes the efficient storage of liquid nitrogen and the effective recovery and reuse of nitrogen, providing users with a more reliable, efficient and environmentally friendly liquid nitrogen storage and nitrogen utilization solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the main cross-sectional structure of a device for reducing vaporization and emptying of a liquid nitrogen storage tank provided by the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of a device for reducing vaporization and emptying of a liquid nitrogen storage tank provided by the utility model;

[0016] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part A shown in FIG.

[0017] Figure numerals: 1. Liquid nitrogen storage tank body; 2. Liquid inlet pipe; 3. Liquid discharge pipe; 4. Sealing cover; 5. Storage box; 6. Vent pipe; 7. Pressure valve; 8. Processing box; 9. Connecting pipe; 10. Regulating valve; 11. Sealing door; 12. Lock; 13. Sealing gasket; 14. Limit seat; 15. Container; 16. Mounting seat; 17. Handle; 18. Support leg; 19. Liquid level meter. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned figures are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The utility model embodiment provides a device for reducing the vaporization and emptying of a liquid nitrogen storage tank, such as Figure 1-3As shown, the device for reducing vaporization and emptying of a liquid nitrogen storage tank comprises: a liquid nitrogen storage tank body 1 fixedly mounted with a liquid inlet pipe 2 and a liquid discharge pipe 3; two sealing covers 4, which are respectively arranged on the liquid inlet pipe 2 and the liquid discharge pipe 3; a storage box 5, which is fixedly mounted on the liquid nitrogen storage tank body 1; a venting pipe 6, which is fixedly mounted on the liquid nitrogen storage tank body 1 and extends to the inside of the storage box 5; a pressure valve 7, which is arranged on the venting pipe 6; a nitrogen utilization mechanism, which is arranged on the liquid nitrogen storage tank body 1 for recovering and reusing nitrogen, and the nitrogen utilization mechanism is arranged corresponding to the storage box 5.

[0021] In this embodiment, by reasonably designing the sealing structure of the liquid inlet pipe 2 and the liquid discharge pipe 3, and installing the vent pipe 6 and the pressure valve 7, when the pressure in the liquid nitrogen storage tank rises to a certain level, the pressure valve will automatically open, so that the nitrogen enters the storage box 5 through the vent pipe 6, rather than being directly discharged into the atmosphere. At the same time, the setting of the nitrogen utilization mechanism enables the nitrogen in the storage box 5 to be recycled and reused, further improving the efficiency of resource utilization. Not only does it reduce the direct discharge of nitrogen and the waste of liquid nitrogen, but it also avoids additional costs such as electricity expenses caused by recycling nitrogen. By installing the sealing cover 4, the sealing of the liquid inlet pipe 2 and the liquid discharge pipe 3 can be ensured to prevent nitrogen leakage. At the same time, the setting of the vent pipe 6 and the pressure valve 7 also enables the device to automatically respond to the pressure changes in the storage tank without manual intervention, reducing the difficulty of operation and safety risks.

[0022] In a further preferred embodiment of the utility model, the nitrogen utilization mechanism includes a processing box 8, a connecting pipe 9, a regulating valve 10 and a sealing mechanism. The processing box 8 is fixedly mounted on the liquid nitrogen storage tank body 1, the connecting pipe 9 is fixedly mounted on the storage box 5 and extends into the processing box 1, the regulating valve 10 is arranged on the connecting pipe 9, and the sealing mechanism is arranged on the processing box 8 for sealing nitrogen.

[0023] In this embodiment, the processing box 8 is fixedly mounted on the liquid nitrogen storage tank body 1. As the main place for nitrogen recovery and processing, it can provide a stable working environment. The connecting pipe 9 is responsible for introducing the nitrogen in the storage box 5 into the processing box 8, converting it into a reusable resource, further improving the resource utilization efficiency and reducing production costs. The regulating valve 10 is arranged on the connecting pipe 9. By adjusting the opening of the regulating valve 10, the flow rate of nitrogen can be controlled to meet different needs. Since nitrogen needs to maintain a certain pressure and purity during the recovery process, sealing is crucial. The sealing mechanism is arranged on the processing box 8 to seal the nitrogen, ensuring that no nitrogen leakage occurs during the recovery process, ensuring the recovery effect and operational safety, and the setting of the sealing mechanism also ensures the stability and safety of the recovery process, further reducing the operational difficulty and safety risks.

[0024] In a further preferred embodiment of the utility model, the sealing mechanism includes a sealing door 11, a lock 12 and a sealing gasket 13, the sealing door 11 is hinged on the processing box 8, the lock 12 is arranged on the processing box 8 and corresponds to the sealing door 11, and the sealing gasket 13 is fixedly installed on the sealing door 11, and the sealing gasket 13 is in conflict with the processing box 8.

[0025] In this embodiment, the sealing door 11 is hingedly mounted on the processing box 8. This design is not only convenient for opening and closing, but also can ensure a close fit between the sealing door 11 and the processing box 8. The lock buckle 12 is arranged on the processing box 8 and corresponds to the sealing door 11. The locking action of the lock buckle 12 can ensure that the sealing door 11 remains stable in the closed state to prevent accidental opening due to external force. When the sealing door 11 is closed, the sealing gasket 13 will be in close contact with the wall of the processing box 8 to form an effective sealing barrier. The material of the sealing gasket 13 is selected from materials with good elasticity and low-temperature resistance to ensure that a good sealing effect can still be maintained in a low-temperature environment.

[0026] In a further preferred embodiment of the utility model, a storage mechanism is provided in the processing box 8 for placing items that need to be frozen by liquid nitrogen, and the storage mechanism includes a limiting seat 14, a containing box 15, four mounting seats 16 and two handles 17. The limiting seat 14 is fixedly installed in the processing box 8, the containing box 15 is arranged on the limiting seat 14, the four mounting seats 16 are all fixedly installed in the containing box 15, and the two handles 17 are respectively hinged on the four mounting seats 16.

[0027] In this embodiment, the limit seat 14 is fixedly installed in the processing box 8, providing a stable support platform for the containing box 15. The containing box 15 is placed on the limit seat 14 and is used to contain items that need to be frozen with liquid nitrogen. Four mounting seats 16 are all fixedly installed in the containing box 15, providing fixed points for the installation of the handle 17. Two handles 17 are respectively hinged on the four mounting seats 16, which is convenient for users to lift and move the containing box 15, thereby facilitating the placement and freezing of items. Users can place the items that need to be frozen in the containing box 15, and then use the handle 17 to put the containing box 15 into the processing box 8 for liquid nitrogen freezing.

[0028] In a further preferred embodiment of the present invention, support legs 18 are fixedly mounted on the liquid nitrogen storage tank body 1 and the processing box 8 , and there are a plurality of support legs 18 .

[0029] In this embodiment, support legs 18 are fixedly mounted on the liquid nitrogen storage tank body 1 and the processing box 8. The number of these support legs 18 is multiple, which ensures the stability of the entire device when placed and used. The design of the support legs 18 can keep a certain distance between the device and the ground, effectively preventing moisture or dirt on the ground from corroding or polluting the device. At the same time, the support legs 18 also play a certain buffering role, which can reduce the impact of external vibration or impact on the device to a certain extent, and protect the precision parts inside the device.

[0030] In a further preferred embodiment of the present invention, a liquid level gauge 19 is provided on the liquid nitrogen storage tank body 1, and valves are fixedly installed on the liquid inlet pipe 2 and the liquid discharge pipe 3.

[0031] In this embodiment, a liquid level meter 19 is provided on the liquid nitrogen storage tank body 1. The liquid level meter is a device for monitoring the liquid nitrogen level in the liquid nitrogen storage tank. It can display the storage amount of liquid nitrogen in real time, help users accurately grasp the remaining amount of liquid nitrogen, and replenish it in time. Through the liquid level meter 19, users can more conveniently manage the storage and use of liquid nitrogen, avoiding various problems caused by insufficient or too high liquid level. Secondly, valves are fixedly installed on the liquid inlet pipe 2 and the liquid discharge pipe 4. The valve of the liquid inlet pipe 2 is used to control the entry of liquid nitrogen. When liquid nitrogen needs to be added to the liquid nitrogen storage tank, open the valve of the liquid inlet pipe 2. The valve of the liquid discharge pipe 3 is used to control the discharge of the liquid in the storage tank. The installation of the valve makes the liquid inlet and discharge process of liquid nitrogen more controllable, and improves the safety and convenience of operation.

[0032] In a further preferred embodiment of the present invention, the liquid nitrogen storage tank body 1, the storage box 5 and the processing box 8 all adopt a double-layer vacuum insulation structure with high-efficiency heat preservation performance.

[0033] In this embodiment, the liquid nitrogen storage tank body 1, the storage box 5 and the processing box 8 all adopt this double-layer vacuum insulation structure. This structure effectively isolates the transfer of heat by forming a vacuum layer between the inner and outer layers, thereby significantly improving the thermal insulation performance. Liquid nitrogen, as a highly volatile cryogenic liquid, requires good thermal insulation measures to prevent it from evaporating too quickly. The use of a double-layer vacuum insulation structure can greatly slow down the evaporation rate of liquid nitrogen and extend its storage time. In the liquid nitrogen storage tank body 1, the double-layer vacuum insulation structure helps to maintain the low temperature state of liquid nitrogen and reduce the loss of liquid nitrogen caused by external heat intrusion.

[0034] In summary, compared with the relevant technology, this device significantly improves the thermal insulation performance of the liquid nitrogen storage tank body, storage box and processing box by adopting a double-layer vacuum insulation structure, thereby effectively slowing down the evaporation rate of liquid nitrogen and extending its storage time. At the same time, by adding a nitrogen utilization mechanism, the effective recovery and reuse of nitrogen is realized, which not only improves the efficiency of resource utilization, but also reduces production costs and energy consumption. In addition, the setting of the liquid level meter and valve makes the storage, liquid filling, liquid discharge and nitrogen recovery process of liquid nitrogen more controllable and safe. On the whole, this device realizes the efficient storage of liquid nitrogen and the effective recovery and reuse of nitrogen, providing users with a more reliable, efficient and environmentally friendly liquid nitrogen storage and nitrogen utilization solution.

[0035] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0036] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A device for reducing vaporization and emptying of a liquid nitrogen storage tank, characterized in that: include: A liquid nitrogen storage tank body having a liquid inlet pipe and a liquid discharge pipe fixedly installed thereon; Two sealing covers, which are respectively arranged on the liquid inlet pipe and the liquid discharge pipe; A storage box, the storage box is fixedly mounted on the liquid nitrogen storage tank body; A vent pipe, the vent pipe is fixedly mounted on the liquid nitrogen storage tank body and extends to the interior of the storage box; A pressure valve, wherein the pressure valve is arranged on the vent pipe; A nitrogen utilization mechanism is provided on the liquid nitrogen storage tank body for recovering and reusing nitrogen, and the nitrogen utilization mechanism is provided corresponding to the storage box.

2. The device for reducing vaporization and emptying of a liquid nitrogen storage tank as claimed in claim 1, characterized in that: The nitrogen utilization mechanism includes a processing box, a connecting pipe, a regulating valve and a sealing mechanism. The processing box is fixedly installed on the liquid nitrogen storage tank body, the connecting pipe is fixedly installed on the storage box and extends into the processing box, the regulating valve is arranged on the connecting pipe, and the sealing mechanism is arranged on the processing box for sealing nitrogen.

3. The device for reducing vaporization and emptying of a liquid nitrogen storage tank as claimed in claim 2, characterized in that: The sealing mechanism includes a sealing door, a lock and a sealing gasket. The sealing door is hinged on the processing box. The lock is arranged on the processing box and corresponds to the sealing door. The sealing gasket is fixedly installed on the sealing door and contacts the processing box.

4. The device for reducing vaporization and emptying of a liquid nitrogen storage tank as claimed in claim 2, characterized in that: A storage mechanism is provided in the processing box for placing items that need to be frozen with liquid nitrogen. The storage mechanism includes a limit seat, a containing box, four mounting seats and two handles. The limit seat is fixedly installed in the processing box, the containing box is arranged on the limit seat, the four mounting seats are all fixedly installed in the containing box, and the two handles are respectively hinged on the four mounting seats.

5. The device for reducing vaporization and emptying of a liquid nitrogen storage tank as claimed in claim 2, characterized in that: Support legs are fixedly mounted on the liquid nitrogen storage tank body and the processing box, and there are a plurality of support legs.

6. The device for reducing vaporization and emptying of a liquid nitrogen storage tank as claimed in claim 1, characterized in that: A liquid level gauge is arranged on the liquid nitrogen storage tank body, and valves are fixedly installed on the liquid inlet pipe and the liquid discharge pipe.

7. The device for reducing vaporization and emptying of a liquid nitrogen storage tank as claimed in claim 1, characterized in that: The liquid nitrogen storage tank body, storage box and processing box all adopt a double-layer vacuum insulation structure with high-efficiency heat preservation performance.

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