Eddy current teaching equipment

Abstract

The utility model relates to the technical field of teaching equipment, and discloses vortex teaching equipment which comprises a vortex tube shell, a vortex cavity is arranged in the vortex tube shell, an air inlet communicated with the vortex cavity is arranged on the side wall of the vortex tube shell, one end of the vortex cavity is communicated with a hot flow tube, the other end of the vortex cavity is communicated with a cold flow tube, and a guide tube is concentrically arranged in the hot flow tube. The vortex tube shell is composed of two half shell bodies, one half shell body is made of transparent materials, and the inner wall of a vortex cavity, the inner wall of a hot flow tube, the inner wall of a cold flow tube and the outer wall of a guide tube of the other half shell body are all coated with thermosensitive paint. The vortex tube solves the problems that a vortex tube in the prior art cannot be applied to teaching and is inconvenient to visually display.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching equipment, in particular to an eddy current teaching device. Background Technique

[0002] An eddy current tube is a simple energy separation device that can divide compressed air or other gases into hot and cold parts to achieve the effect of refrigeration or heating. The invention of the eddy current tube can be traced back to the early 20th century. Its uniqueness lies in that it does not require moving parts and will not cause wear, so it is maintenance-free and has a long service life. In addition, the eddy current tube does not involve any chemical reactions during operation and has high safety, especially suitable for occasions that require precise environmental control. Therefore, further research and development based on the application of eddy current tubes has always had a wide market demand.

[0003] At present, most of the eddy current tube teaching only focuses on theoretical explanations, which are difficult for students to understand and affect the teaching efficiency. Moreover, most of the existing eddy current tubes are of an integral metal structure, which is difficult to be directly applied to teaching, and it is impossible to simply and intuitively display the generation of eddy currents inside the eddy current tube and the change of the temperature gradient of the compressed air inside, etc., nor can it meet the purpose of low-cost and intuitive teaching. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide an eddy current teaching device to solve the problem that the eddy current tube in the prior art cannot be applied to teaching and is not convenient for intuitive display.

[0005] The utility model solves the above technical problems through the following technical means: an eddy current teaching device, including an eddy current tube shell, an eddy current cavity is arranged inside the eddy current tube shell, an air inlet communicating with the eddy current cavity is arranged on the side wall of the eddy current tube shell, one end of the eddy current cavity is communicated with a hot flow tube, and the other end is communicated with a cold flow tube. A conduit is concentrically arranged inside the hot flow tube. The eddy current tube shell is composed of two half shells, one of the half shells is made of a transparent material, and the inner walls of the eddy current cavity, the inner walls of the hot flow tube, the inner walls of the cold flow tube and the outer wall of the conduit of the other half shell are all coated with thermosensitive paint.

[0006] Further, a plurality of flexible strip-shaped pieces are evenly distributed on the inner wall of the hot flow tube coated with thermosensitive paint, which is used to intuitively display the rotation of the eddy current.

[0007] Further, the end of the hot flow tube is threadedly connected with a conical regulating valve. The conical regulating valve is cup-shaped, a conical plug is arranged at the bottom of the cup of the conical regulating valve, and a plurality of through holes are evenly distributed along the circumferential direction of the conical plug at the bottom of the cup. It is used for the outflow of hot fluid and can adjust the outflow flow rate.

[0008] Further, a reducing pipe is also connected to the end of the cold flow tube, which is used for the outflow of cold fluid.

[0009] Further, a vortex generator is provided in the vortex chamber. The vortex generator is cylindrical and is provided with cold flow through holes. The vortex chamber is communicated with the cold flow pipe through the cold flow through holes, ensuring the effect of vortex formation.

[0010] Further, the intake direction of the air inlet is tangent to the cylindrical surface of the vortex generator, better ensuring the effect of vortex formation.

[0011] Further, a quick connector is connected to the air inlet, facilitating the quick plugging of the compressed air pipe.

[0012] Advantages of the utility model:

[0013] By providing a transparent half shell in the utility model, and thermosensitive coatings are applied on the inner wall of the vortex chamber, the inner wall of the hot flow pipe, the inner wall of the cold flow pipe and the outer wall of the conduit of the other half shell, the intuitive display of the temperature gradient change of the compressed air in the vortex tube is realized through the color change of the thermosensitive coating; in addition, the rotation of the vortex is intuitively displayed through the flexible strip on the inner wall of the hot flow pipe, and the gas diversion condition of the compressed air inside the vortex tube is vividly and intuitively displayed. Description of the drawings

[0014] Figure 1 is the overall structural schematic diagram of the utility model;

[0015] Figure 2 is the top view of the utility model;

[0016] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0017] Among them, 1 - vortex housing, 11 - vortex chamber, 111 - vortex generator, 112 - cold flow through hole, 12 - air inlet, 121 - quick connector, 13 - hot flow pipe, 131 - conduit, 132 - flexible strip, 14 - cold flow pipe, 15 - conical regulating valve, 151 - conical plug, 152 - through hole, 16 - reducing pipe. Specific embodiments

[0018] The following specific embodiments are used to illustrate the implementation manners of the utility model. Those skilled in the art can understand the advantages and effects of the utility model from the content disclosed in this specification. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the utility model. In order to better illustrate the embodiments of the utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0019] In the figures of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the figures. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the figures are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] As Figures 1 - 3 shown, a vortex teaching device of the present utility model is provided. As Figure 1 shown, it includes a vortex tube shell 1. An air inlet 12 communicating with the vortex chamber 11 is opened on the side wall of the vortex tube shell 1. The air inlet direction of the air inlet 12 is tangent to the cylindrical surface of the vortex generator 111, which can better ensure the effect of vortex formation. As Figure 2 shown, a quick-connect joint 121 is threadedly connected to the air inlet 12, which is convenient for quickly connecting with an external compressed air source through the quick-connect joint 121, such as quickly plugging in a compressed air pipe.

[0021] As Figure 3 shown, a vortex chamber 11 is provided inside the vortex tube shell 1. One end of the vortex chamber 11 communicates with a hot flow tube 13, and the other end communicates with a cold flow tube 14. A vortex generator 111 is provided inside the vortex chamber 11. The vortex generator 111 is cylindrical and is provided with cold flow through holes 112. The vortex chamber 11 communicates with the cold flow tube 14 through the cold flow through holes 112. A conduit 131 is concentrically arranged inside the hot flow tube 13. The conduit 131 is fixedly connected to the hot flow tube 13 through a bracket. The vortex tube shell 1 is composed of two half shells. One half shell is made of a transparent material, and the inner walls of the vortex chamber 11, the hot flow tube 13, the cold flow tube 14, and the outer wall of the conduit 131 of the other half shell are all coated with a thermosensitive coating. The thermosensitive coating has reversibility and can intuitively indicate color changes repeatedly. The two half shells can be connected by gluing or other heat fusion forms to ensure the connection and sealing effect. A plurality of flexible strip-shaped pieces 132 are evenly distributed on the inner wall of the hot flow tube 13 coated with the thermosensitive coating. The flexible strip-shaped pieces 132 are used to intuitively display the rotation posture of the fluid in the hot flow tube 13. The color change of the inner wall coated with the thermosensitive coating and the rotation posture of the flexible strip-shaped pieces with the fluid can be directly observed through one side of the transparent shell. Among them, the outer wall of the conduit 131 is used to display the temperature change of the inner layer fluid (lower temperature), and the inside of the conduit 131 serves as a return channel for the cold fluid.

[0022] As Figure 3As shown in the figure, the end of the heat flow tube 13 is threadedly connected with a conical regulating valve 15. The conical regulating valve 15 is cup-shaped. A conical plug 151 is provided at the bottom of the cup of the conical regulating valve 15. The conical plug 151 cannot fully extend into the heat flow tube 13 through two limit screws screwed in from the outside of the conical regulating valve 15, so as to limit the minimum outflow rate of the hot fluid. By rotating the conical regulating valve 15, the outflow rate of the hot fluid can be changed by the distance that the conical plug 151 extends into the heat flow tube 13. A number of through holes 152 are evenly distributed along the circumferential direction of the conical plug 151 at the bottom of the cup. The end of the cold flow tube 14 is connected with a reducing pipe 16. As Figure 3 shown, the inner diameter of the reducing pipe 16 gradually decreases from large to small, that is, a larger inner diameter pipe is connected to a smaller inner diameter pipe, and the smaller inner diameter pipe serves as the outlet of the cold fluid.

[0023] The working principle of the present utility model is as follows:

[0024] Compressed air enters the eddy current chamber 11 from the air inlet 12 and forms a free eddy current by rotating at a high speed along the circumferential direction of the eddy current generator 111. Due to the friction caused by the speed difference between the inner and outer layers, heat exchange occurs. The outer layer forms hot fluid, and the central layer forms cold fluid. The outer layer of hot fluid flows out along the through holes 152 of the heat flow tube 13 and the conical regulating valve 15. The inner layer of cold fluid flows out along the conduit 131, the cold through hole 112, the cold flow tube 14, and the reducing pipe 16 after colliding with the conical plug 151.

[0025] During this process, the thermosensitive coatings applied on the inner wall of the eddy current chamber 11, the inner wall of the heat flow tube 13, the inner wall of the cold flow tube 14, and the outside of the conduit 131 can intuitively display the temperature gradient change of the air entering the eddy current tube. The flexible strip 132 on the inner wall of the heat flow tube 13 also rotates and swings accordingly to intuitively display the rotation angle of the eddy current, etc. The structure of the present utility model is simple and the cost is low, and it can realize low-cost intuitive teaching.

[0026] The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A vortex teaching device, comprising a vortex tube shell (1), wherein a vortex chamber (11) is provided in the vortex tube shell (1), an air inlet (12) connected to the vortex chamber (11) is provided on a side wall of the vortex tube shell (1), one end of the vortex chamber (11) is connected to a hot flow tube (13), and the other end is connected to a cold flow tube (14), characterized in that: A conduit (131) is concentrically arranged inside the heat flow tube (13), and the vortex tube shell (1) is composed of two half shells, one of which is made of a transparent material, and the inner wall of the vortex chamber (11), the inner wall of the heat flow tube (13), the inner wall of the cold flow tube (14) and the outer wall of the conduit (131) of the other half shell are all coated with a heat-sensitive paint.

2. The eddy current teaching device according to claim 1, characterized in that: The inner wall of the heat flow pipe (13) coated with a heat-sensitive paint is also evenly distributed with a plurality of flexible strip-shaped sheets (132).

3. The eddy current teaching device according to claim 1, characterized in that: The end of the heat flow pipe (13) is threadedly connected to a conical regulating valve (15), the conical regulating valve (15) is cup-shaped, the cup bottom of the conical regulating valve (15) is provided with a conical plug (151), and the cup bottom is evenly distributed with a plurality of through holes (152) along the circumference of the conical plug (151).

4. The eddy current teaching device according to claim 1, characterized in that: The end of the cold flow pipe (14) is also connected to a reducing pipe (16).

5. The eddy current teaching device according to claim 1, characterized in that: A vortex generator (111) is provided in the vortex chamber (11); the vortex generator (111) is cylindrical and has a cold flow hole (112); the vortex chamber (11) is connected to the cold flow pipe (14) through the cold flow hole (112).

6. The eddy current teaching device according to claim 5, characterized in that: The air intake direction of the air intake port (12) is tangent to the cylindrical surface of the vortex generating body (111).

7. The eddy current teaching device according to claim 1, characterized in that: The air inlet (12) is connected to a quick-connect connector (121).

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