Liquid nitrogen experiment demonstration device

Abstract

The utility model relates to a liquid nitrogen experiment demonstration device, and belongs to the technical field of teaching aids. The utility model provides a liquid nitrogen experiment demonstration device comprising a hydrothermal solution storage device which comprises a hydrothermal solution inlet capable of being filled with a hydrothermal solution and a hydrothermal solution outlet controlled by a valve; the liquid nitrogen storage device is internally provided with a storage space for storing liquid nitrogen, the storage space communicates with the hot liquid outlet, and the liquid nitrogen storage device is located below the hot liquid storage device; and the nitrogen sprayer is communicated with the storage space and comprises at least two vent holes. According to the device provided by the invention, students can clearly observe white gas generated after liquid nitrogen is heated and expanded so as to understand the low-temperature characteristics of the liquid nitrogen, the independent storage areas for the high-temperature liquid and the liquid nitrogen are arranged, the high-temperature liquid is controlled to flow to the liquid nitrogen storage area by the valve between the two areas, demonstration is realized by controlling the valve, and the demonstration efficiency is improved. By arranging a liquid nitrogen storage closed space, the safety of a demonstrator and an observer is guaranteed.

Description

Technical Field

[0001] The present application relates to a liquid nitrogen experiment demonstration device, belonging to the technical field of teaching aids. Background Art

[0002] Liquid nitrogen is a liquid obtained by inert, colorless, odorless, non-corrosive, and non-flammable nitrogen gas at extremely low temperatures. It is a liquid form of nitrogen gas at low temperatures. The boiling point of nitrogen is -195.79℃ (77K). If the temperature is below this under normal atmospheric pressure, liquid nitrogen will be formed; if pressurized, liquid nitrogen can be obtained at a higher temperature. If the human body comes into contact with it without protective measures, the skin will be in danger of severe frostbite.

[0003] In order to make students understand the low temperature characteristics of liquid nitrogen during the teaching process, protect the life safety of demonstrators and viewers, and also to allow as many people as possible to see the content of the experimental demonstration clearly from different angles, it is necessary to provide a liquid nitrogen experimental demonstration device. Utility Model Content

[0004] In order to solve the above problems, the present application proposes a liquid nitrogen experiment demonstration device, which belongs to the technical field of teaching aids. The device provided by the present application allows students to clearly observe the white gas produced by the expansion of liquid nitrogen when heated, so as to understand the low-temperature characteristics of liquid nitrogen. It is provided with independent storage areas for high-temperature liquid and liquid nitrogen. A valve controls the flow of high-temperature liquid to the liquid nitrogen storage area between the two areas. The demonstration is realized by controlling the valve, and the safety of the demonstrator and observer is guaranteed by setting a closed space for liquid nitrogen storage.

[0005] The present application provides a liquid nitrogen experimental demonstration device, comprising:

[0006] A hot liquid storage device, the hot liquid storage device comprising a hot liquid inlet capable of being filled with hot liquid, and a hot liquid outlet controlled by a valve;

[0007] A liquid nitrogen storage device, wherein a storage space for storing liquid nitrogen is provided in the liquid nitrogen storage device, the storage space is communicated with the hot liquid outlet, and the liquid nitrogen storage device is located below the hot liquid storage device;

[0008] A nitrogen sparger is communicated with the storage space and comprises at least two venting holes.

[0009] Optionally, a base is also included, and the base is arranged at the bottom of the liquid nitrogen storage.

[0010] Optionally, the nitrogen sparger is integrally formed with the liquid nitrogen storage device, the nitrogen sparger comprises a plurality of venting holes, and the storage space is connected to the venting holes.

[0011] Optionally, the liquid nitrogen storage device is a sphere, a cylindrical storage space is provided in the sphere, a second space is formed between the outer shell of the cylindrical storage space and the outer shell of the sphere, a plurality of vent holes are provided on the side of the sphere and are connected to the second space, and a through hole is provided on the outer shell of the cylindrical storage space so that the storage space is directly connected to the second space, thereby achieving indirect connection between the storage space and the vent holes.

[0012] Optionally, the outer shell of the sphere further extends outward to form a columnar space, an air release hole is provided on the outer shell of the columnar space, and the columnar space is directly connected to the second space.

[0013] Optionally, the outer shell of the sphere extends outward to form a first cylindrical space and a second cylindrical space which are arranged opposite to each other, and air release holes are provided on the outer shells of the first cylindrical space and the second cylindrical space.

[0014] Optionally, the inner diameters of the first cylindrical space and the second cylindrical space are smaller than the inner diameter of the cylindrical storage space.

[0015] Optionally, the liquid nitrogen storage is in a Y-shape, with the bottom connected to the base, one side of the Y-shape is forked and connected to the hot liquid inlet, and the other side is forked and connected to the nitrogen sprayer.

[0016] Optionally, the nitrogen sprayer is a column having a plurality of venting holes.

[0017] Optionally, the inner diameter of the column is smaller than the inner diameter of the Y-shaped liquid nitrogen storage device.

[0018] The beneficial effects of this application include but are not limited to:

[0019] 1. The liquid nitrogen experimental demonstration device provided in the present application is provided with independent storage areas for high-temperature liquid (such as water) and liquid nitrogen. A valve is used between the two areas to control the flow of high-temperature liquid (such as water) to the liquid nitrogen storage area. By controlling the valve, the required demonstration effect is achieved, allowing students to clearly observe the white gas generated by the expansion of liquid nitrogen when heated from different angles, thereby understanding the low-temperature characteristics of liquid nitrogen.

[0020] 2. The liquid nitrogen experimental demonstration device provided in this application is equipped with a closed space for storing liquid nitrogen, which can ensure the personal safety of demonstrators and observers.

[0021] 3. The liquid nitrogen experimental demonstration device provided in this application has a high-pressure gas outlet in the mixing area with a diameter that decreases from large to small, which can change the injection pressure and enhance the injection effect.

[0022] 4. The liquid nitrogen experimental demonstration device provided in this application has multiple nozzles on the injection transverse tube, which is convenient for enhancing the demonstration effect and adapting to different demonstration environments and demonstration needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 This is a three-dimensional schematic diagram of a first embodiment of a liquid nitrogen experiment demonstration device involved in the present application;

[0025] Figure 2 This is a three-dimensional schematic diagram of a liquid nitrogen storage device in the first embodiment of the liquid nitrogen experiment demonstration device involved in this application;

[0026] Figure 3 This is a three-dimensional schematic diagram of a hot liquid storage device in the first embodiment of the liquid nitrogen experiment demonstration device involved in this application;

[0027] Figure 4 This is a three-dimensional schematic diagram of a second embodiment of the liquid nitrogen experiment demonstration device involved in this application;

[0028] Figure 5 This is a three-dimensional schematic diagram of a liquid nitrogen storage device in the second embodiment of the liquid nitrogen experiment demonstration device involved in this application;

[0029] Figure 6 This is a three-dimensional schematic diagram of implementation method three of the liquid nitrogen experiment demonstration device involved in this application.

[0030] List of parts and reference numerals:

[0031] Hot liquid storage device-1, valve-2, liquid nitrogen storage device-3, storage space-4, nitrogen sprayer-5, vent hole-6, base-7, first cylindrical space-8, second cylindrical space-9, extension section-10. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0033] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0035] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like 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 application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0039] refer to Figure 1-6The present application provides a liquid nitrogen experiment demonstration device, comprising: a hot liquid storage device 1, wherein the hot liquid storage device 1 comprises a hot liquid inlet capable of being filled with hot liquid, and a hot liquid outlet controlled by a valve 2; a liquid nitrogen storage device 3, wherein a storage space 4 for storing liquid nitrogen is provided in the liquid nitrogen storage device 3, wherein the storage space 4 is connected to the hot liquid outlet, and the liquid nitrogen storage device 3 is located below the hot liquid storage device 1; a nitrogen sprayer 5, wherein the nitrogen sprayer 5 is connected to the storage space 4 and comprises at least two venting holes 6.

[0040] Hot liquid such as hot water is loaded into the hot liquid storage 1 through the hot liquid inlet, liquid nitrogen is loaded into the liquid nitrogen storage 3, and then the hot liquid storage 1 is installed in the liquid nitrogen storage 3, so that the hot liquid outlet is connected to the storage space 4 in the liquid nitrogen storage 3, but due to the control of the valve 2, the hot liquid outlet and the storage space 4 are still not directly connected. During the demonstration, by controlling the valve 2 in the hot liquid storage 1, the hot liquid such as hot water enters the liquid nitrogen storage space 4 after the valve 2 is opened, and the hot water is mixed with the low-temperature liquid nitrogen. After absorbing heat, the liquid nitrogen is accelerated to gasify and enter the nitrogen sprayer 5, and finally discharged through the venting hole 6 on the nitrogen sprayer 5 to form white gas, so that students can observe this phenomenon, understand the low-temperature characteristics of liquid nitrogen, and achieve the teaching purpose of the characteristics of liquid nitrogen.

[0041] The liquid nitrogen experiment demonstration device is provided with independent storage areas for high-temperature liquid and liquid nitrogen, and when an experimental demonstration is required, the hot liquid is mixed with the liquid nitrogen by opening valve 2, thereby achieving the purpose of demonstration. The placement of liquid nitrogen and hot liquid can be arranged in advance by professional demonstrators, and a closed space for separate storage of liquid nitrogen is provided, which can ensure the personal safety of demonstrators and observers.

[0042] As an embodiment, a base 7 is further included, and the base 7 is arranged at the bottom of the liquid nitrogen storage 3. Since there will be a certain reaction force during the nitrogen spraying process, the stability of the entire device can be increased by setting the base 7, and the contact stability between the entire device and the ground can be increased, thereby ensuring the stability of the demonstration device and the safety during the demonstration experiment.

[0043] As an embodiment, the nitrogen sparger 5 is integrally formed with the liquid nitrogen storage 3, and the nitrogen sparger 5 includes a plurality of venting holes 6, and the storage space 4 is connected with the venting holes 6. The nitrogen sparger 5 is integrally formed with the liquid nitrogen storage 3, the overall stability of the device is higher, and the occupied volume is also smaller, which is convenient for small demonstration needs.

[0044] As an embodiment, the liquid nitrogen storage device 3 is a sphere, a cylindrical storage space 4 is provided in the sphere, a second space is formed between the outer shell of the cylindrical storage space 4 and the outer shell of the sphere, a plurality of vent holes 6 are provided on the side of the sphere and are connected to the second space, and a through hole is provided on the outer shell of the cylindrical storage space 4 so that the storage space 4 is directly connected to the second space, thereby realizing indirect connection between the storage space 4 and the vent holes 6.

[0045] As a specific implementation method, Figure 1 As shown, the vent hole 6 is arranged near the storage space 4 in the liquid nitrogen storage device 3, and the second space and the vent hole 6 are structured as a nitrogen sprayer 5. Such an arrangement enables the device to have the advantages of small size and light weight, and is convenient for being placed for demonstration as needed under conditions of narrow space, and there is no need to install and adjust the nitrogen sprayer 5.

[0046] As an embodiment, the shell of the sphere further extends outward to form a column space, and the shell of the column space is provided with a vent hole 6, and the column space is directly connected to the second space. By providing the column space extending outward, the number of vent holes 6 can be increased, and the advantages of integrated molding are taken into account, and there is no need to install and adjust the nitrogen sprayer 5, which has the advantages of safety and stability.

[0047] As an implementation mode, the outer shell of the sphere extends outward to form a first cylindrical space 8 and a second cylindrical space 9 which are arranged opposite to each other, and air release holes 6 are provided on the outer shells of the first cylindrical space 8 and the second cylindrical space 9.

[0048] As an embodiment, the first cylindrical space 8 is not closed on one side away from the nitrogen storage space 4, and includes an open port. The second cylindrical space 9 is not closed on one side away from the nitrogen storage space 4, and includes an open port. It also includes a detachably connected extension section 10, and the extension section 10 is provided with a vent hole 6. In actual use, the extension section 10 is installed at both ends of the first cylindrical space 8 and the second cylindrical space 9 to extend the length of the nitrogen sprayer 5 and increase the number of vent holes 6 to meet the needs of more students to watch.

[0049] It should be noted that the present application does not make any specific limitation on the method of detachable connection, which can be selected by technical personnel in this field as needed. The implementation method of this structure is relatively simple and is a routine operation, and is not specifically limited here. For example, the simplest threaded connection method can be used.

[0050] As a specific embodiment, as shown in FIG4 , the outer shell of the sphere of the liquid nitrogen storage device 3 extends outwardly with a first cylindrical space 8 and a second cylindrical space 9 on both sides, and the outer shell is provided with a vent hole 6, and the upper side is the opening of the liquid nitrogen storage space 4, which is used to communicate with the hot liquid inlet. The hot liquid storage device 1 is detachably connected to the liquid nitrogen storage device. As shown in the figure, the outer diameter of the hot liquid storage device 1 in this embodiment is slightly smaller than the inner diameter of the upper opening of the liquid nitrogen storage space 4, and a buckle structure is provided at the upper opening of the liquid nitrogen storage space 4, which can cooperate with the protrusion on the hot liquid storage device 1 such as the screw in the figure, and one end of the valve 2 of the hot liquid storage device 1 is inserted into the upper opening of the liquid nitrogen storage space 4. The screw and the buckle can cooperate to fix the hot liquid storage device 1 and the liquid nitrogen storage device 3.

[0051] It is known to those skilled in the art that the hot liquid storage device 1 and the liquid nitrogen storage device 3 can be fixed by a detachable connection method commonly used in the art. For example, threaded structures for matching are respectively provided on the hot liquid storage device 1 and the liquid nitrogen storage device 3, or a flange method commonly used in a pipeline connection structure is selected, and a first flange and a second flange are respectively provided at the connection between the hot liquid storage device 1 and the liquid nitrogen storage device 3. The first flange and the second flange are fixed after docking to realize the detachable fixation of the hot liquid storage device 1 and the liquid nitrogen storage device 3.

[0052] The present application does not limit the implementation method of the valve 2 for controlling the hot liquid, and it can be implemented by using technical means commonly used in the field. Since the implementation method of the valve 2 structure is very conventional, no specific limitation or detailed description is made here.

[0053] As an embodiment, the inner diameters of the first cylindrical space 8 and the second cylindrical space 9 are smaller than the inner diameter of the cylindrical storage space 4, so that when the gasified nitrogen enters the first cylindrical space 8 and the second cylindrical space 9 from the storage space 4, the flow rate of the nitrogen becomes faster, thereby achieving the effect of nitrogen being quickly ejected from the vent hole 6, thereby improving the demonstration effect of nitrogen spraying.

[0054] As an embodiment, the liquid nitrogen storage device 3 is Y-shaped, the bottom is connected to the base 7, one side of the Y-shaped fork is connected to the hot liquid inlet, and the other side of the fork is connected to the nitrogen sparger 5. By setting a Y-shaped liquid nitrogen storage device 3, wherein the fork on the other side of the Y-shaped is connected to the nitrogen sparger 5, it can be connected to a separately set nitrogen sparger 5, so as to meet different demonstration needs. For example, by additionally setting a nitrogen sparger 5 that occupies a larger space and is longer, the number of venting holes 6 can be increased, so as to meet the needs of large-scale demonstrations, and a large number of students can watch the experimental demonstration at the same time. At the same time, the Y-shaped liquid nitrogen storage device 3 is set, and the directions of hot liquid inflow and gaseous nitrogen outflow are separated, and a certain angle is formed to achieve a good separation effect. The outflow of gas does not affect the continuous addition of hot liquid such as hot water, which can meet the needs of long-term large-scale demonstrations.

[0055] It should be noted that, for other implementations, such as the above-mentioned integrated arrangement of the nitrogen sparger 5 and the liquid nitrogen storage 3, a through hole is arranged between the storage space 4 in the nitrogen storage and the first space, and the outflow of gas will not affect the addition of hot liquid such as hot water. For those skilled in the art, the position of the through hole, such as height, angle, and size of the through hole can be appropriately adjusted according to the situation to meet the needs of normal completion of the experimental demonstration. This is a routine operation of those skilled in the art.

[0056] As an implementation mode, the nitrogen sprayer 5 is a column, and the column is provided with a plurality of venting holes 6. Those skilled in the art can set the number of venting holes 6 according to the needs of the demonstration.

[0057] As an embodiment, the inner diameter of the column is smaller than the inner diameter of the Y-shaped liquid nitrogen storage 3, so that when the gasified nitrogen enters the column space from the storage space 4, the flow rate of the nitrogen becomes faster, thereby achieving the effect of nitrogen being quickly ejected from the vent hole 6, thereby improving the demonstration effect of nitrogen spraying. Those skilled in the art can also set the inner diameter of the column according to the needs of the demonstration, and adjust the size of the liquid nitrogen storage 3 according to the needs of the demonstration duration or scale to control the capacity of liquid nitrogen.

[0058] As a specific implementation method, Figure 6 As shown, the nitrogen sprayer 5 is connected to the other end of the Y-shaped liquid nitrogen storage device 3, and the inner diameter of the column is smaller. By setting a caliber conversion device in the middle, the injection caliber can be changed from large to small, thereby changing the injection pressure and enhancing the injection effect.

[0059] Those skilled in the art may also provide an appropriate rotating structure in the aperture conversion device as needed, which can satisfy the rotation of the nitrogen sprayer 5, so as to adjust the direction of the venting hole 6, so as to facilitate the demonstrator to adjust the injection direction as needed, and make it more convenient for the observer to observe the experimental phenomenon. The design of the rotating structure may adopt a connecting T-head, the body of the column is fixed and connected to the connecting T-head, the column and the connecting T-head are sealed to prevent gas leakage, and the column can rotate around its axis. Those skilled in the art may adopt the commonly used implementation method in the prior art as needed to implement this, and the present application does not specifically limit the implementation method.

[0060] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0061] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A liquid nitrogen experimental demonstration device, characterized in that: include: A hot liquid storage device, the hot liquid storage device comprising a hot liquid inlet capable of being filled with hot liquid, and a hot liquid outlet controlled by a valve; A liquid nitrogen storage device, wherein a storage space for storing liquid nitrogen is provided in the liquid nitrogen storage device, the storage space is communicated with the hot liquid outlet, and the liquid nitrogen storage device is located below the hot liquid storage device; A nitrogen sparger is communicated with the storage space and comprises at least two venting holes.

2. The liquid nitrogen experimental demonstration device according to claim 1, characterized in that: It also includes a base, which is arranged at the bottom of the liquid nitrogen storage.

3. The liquid nitrogen experimental demonstration device according to claim 2, characterized in that: The nitrogen sparger is integrally formed with the liquid nitrogen storage device, and the nitrogen sparger comprises a plurality of venting holes, and the storage space is communicated with the venting holes.

4. The liquid nitrogen experimental demonstration device according to claim 3, characterized in that: The liquid nitrogen storage device is a sphere, a cylindrical storage space is arranged inside the sphere, a second space is formed between the outer shell of the cylindrical storage space and the outer shell of the sphere, a plurality of venting holes are provided on the side of the sphere and are connected with the second space, and a through hole is provided on the outer shell of the cylindrical storage space so that the storage space is directly connected with the second space, thereby realizing indirect connection between the storage space and the venting holes.

5. The liquid nitrogen experimental demonstration device according to claim 4, characterized in that: The outer shell of the sphere further extends outward to form a columnar space, an air release hole is provided on the outer shell of the columnar space, and the columnar space is directly connected to the second space.

6. The liquid nitrogen experimental demonstration device according to claim 5, characterized in that: The outer shell of the sphere extends outward to form a first cylindrical space and a second cylindrical space which are arranged opposite to each other, and air release holes are provided on the outer shells of the first cylindrical space and the second cylindrical space.

7. The liquid nitrogen experimental demonstration device according to claim 6, characterized in that: The inner diameters of the first cylindrical space and the second cylindrical space are smaller than the inner diameter of the cylindrical storage space.

8. The liquid nitrogen experimental demonstration device according to claim 2, characterized in that: The liquid nitrogen storage device is Y-shaped, with the bottom connected to the base, one side of the Y-shape is forked and connected to the hot liquid inlet, and the other side is forked and connected to the nitrogen sprayer.

9. The liquid nitrogen experimental demonstration device according to claim 8, characterized in that: The nitrogen sprayer is a column, and a plurality of air release holes are provided on the column.

10. The liquid nitrogen experiment demonstration device according to claim 9, characterized in that: The inner diameter of the column is smaller than the inner diameter of the Y-shaped liquid nitrogen storage device.

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