Demonstration device for demonstrating air flow characteristics

Abstract

The utility model provides a demonstration device for displaying air flow characteristics, which comprises an air bellow and a display rack, a fan is arranged in the air bellow, a feeding box and a switching box are fixed on the display rack, an air outlet of the fan is connected with the feeding box through an air inlet pipeline, the feeding box is provided with a feeding port, and the feeding box is connected with the switching box through a communication pipeline; the switching box is provided with a first air outlet, the first air outlet is connected with a first air outlet pipeline, the end of the first air outlet pipeline is located in the first object collecting box, the switching box is further provided with a second air outlet, the second air outlet is connected with a second air outlet pipeline, and the end of the second air outlet pipeline is located in the second object collecting box. According to the scheme, the demonstration device for displaying the air flow characteristics is provided with the labyrinth type air pipeline circulation structure, so that the air tightness condition of air flow, the direction of air flow and the suction and blowing effect on different objects are displayed in an interesting manner, and audiences can feel the charm of the air flow characteristics.

Description

Technical Field

[0001] The utility model relates to the technical field of popular science exhibits, in particular to a demonstration device for showing the characteristics of air flow. Background Art

[0002] Wind is a natural phenomenon caused by air flow. From a scientific perspective, wind often refers to the horizontal movement component of air, including direction and magnitude, namely wind direction and wind speed; but for flight, it also includes the vertical movement component, namely the so-called vertical or ascending / descending air current. Air flow is a typical fluid system, and all fluids, including gases and water, follow Bernoulli's principle, which is one of the basic phenomena when fluids flow steadily. The content of Bernoulli's law is: when an incompressible and ideal fluid flows steadily along a flow tube, as the flow velocity increases, the static pressure of the fluid will decrease; conversely, when the flow velocity decreases, the static pressure of the fluid will increase. Its essence is the conservation of the mechanical energy of the fluid, that is: kinetic energy + gravitational potential energy + pressure potential energy = constant. Bernoulli's law has extensive applications in hydraulics and applied fluid mechanics.

[0003] Most of the current popular science exhibits related to showing the characteristics of air flow focus on Bernoulli's principle, and more are about showing the air flow velocity and pressure, the suction or thrust on objects. There are few exhibitions on the direction of air flow, the necessary conditions for air flow, and the suction and blowing effects on different items. Content of the Utility Model

[0004] The utility model provides a demonstration device for showing the characteristics of air flow to solve the technical problem that most of the current popular science exhibits related to showing the characteristics of air flow focus on Bernoulli's principle, and more are about showing the air flow velocity and pressure, the suction or thrust on objects, and there are few exhibitions on the direction of air flow, the necessary conditions for air flow, and the suction and blowing effects on different items.

[0005] To solve the above technical problem, the utility model provides the following technical solution:

[0006] A demonstration device for showing the characteristics of air flow includes a bellows and a display rack. A fan is arranged inside the bellows. A feeding box and a conversion box are fixed on the display rack. The air outlet of the fan is connected to the feeding box through an air inlet pipe. The feeding box is provided with a feeding port for feeding flowing objects, and the feeding box is connected to the conversion box through a connecting pipe. The conversion box is provided with a first air outlet, and the first air outlet is connected to a first air outlet pipe. The end of the first air outlet pipe is located in a first object receiving box. The conversion box is further provided with a second air outlet, and the second air outlet is connected to a second air outlet pipe. The end of the second air outlet pipe is located in a second object receiving box.

[0007] Optionally, a conversion flap is provided inside the conversion box. The conversion flap is connected to a handwheel, and the handwheel is used to drive the conversion flap to rotate so that the conversion flap blocks the first air outlet or the second air outlet.

[0008] Optionally, the air inlet pipe, the connecting pipe, the first air outlet pipe, and the second air outlet pipe are all transparent corrugated hoses, and the connecting pipe, the first air outlet pipe, and the second air outlet pipe are wound around the display rack in an irregular shape.

[0009] Optionally, a feeding box baffle is provided on the outer surface of the feeding box. The feeding box baffle is made of transparent rubber, and a horizontal slit is provided at the center of the feeding box baffle to form a feeding port.

[0010] Optionally, the display rack includes a first rack body and a second rack body. The feeding box is arranged on the first rack body, the conversion box is arranged on the second rack body, and the connecting pipe, the first air outlet pipe, and the second air outlet pipe are respectively detachably connected through connecting components at the connection of the first rack body and the second rack body.

[0011] Optionally, the air box is located at the bottom on one side of the display rack. The air inlet pipe is connected to the bottom end of the feeding box, one end of the connecting pipe is connected to the top end of the feeding box, and the other end is connected to the top end of the conversion box. Both the first air outlet and the second air outlet are arranged at the bottom end of the conversion box.

[0012] Optionally, both the first collection box and the second collection box are fixed on the display rack.

[0013] Optionally, the flowing object is a silk ribbon and / or a foam ball.

[0014] The beneficial effects of the above technical solutions of the present utility model are as follows:

[0015] In the above solution, the demonstration device for displaying the air flow characteristics displays the airtightness condition of air flow, the direction of air flow, and the air suction and blowing effects on different objects in a fun way by setting a labyrinthine air pipeline circulation structure, enabling the audience to feel the charm of air flow characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the demonstration device of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the feeding box of the present utility model.

[0018] [Reference Numerals]

[0019] 1. Bellows; 2. Fan; 3. Air inlet pipe; 4. First collection box; 5. Display rack;

[0020] 6. Feeding box; 7. Feeding box baffle; 8. Connecting pipe; 9. Connecting component;

[0021] 10. Second air outlet pipe; 11. Conversion box; 12. Conversion flap; 13. Handwheel;

[0022] 14. First air outlet pipe; 15. Second collection box; 16. Flowing object. Detailed implementation mode

[0023] To make the technical problems, technical solutions and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the drawings and specific embodiments.

[0024] As Figures 1 to 2 shown, an embodiment of the present utility model provides a demonstration device for showing the air flow characteristics, including a bellows 1 and a display rack 5. A fan 2 is arranged inside the bellows 1. A feeding box 6 and a conversion box 11 are fixed on the display rack 5. The air outlet of the fan 2 is connected to the feeding box 6 through an air inlet pipe 3. The feeding box 6 is provided with a feeding port for feeding the flowing object 16, and the feeding box 6 is connected to the conversion box 11 through a connecting pipe 8.

[0025] The conversion box 11 is provided with a first air outlet, and the first air outlet is connected to the first air outlet pipe 14. The end of the first air outlet pipe 14 is located in the first collection box 4 to deliver the flowing object 16 to the first collection box 4 through a complex trajectory. The conversion box 11 is further provided with a second air outlet, and the second air outlet is connected to the second air outlet pipe 10. The end of the second air outlet pipe 10 is located in the second collection box 15 to deliver the flowing object 16 to the second collection box 15 through a complex trajectory.

[0026] As Figure 1 shown, a conversion flap 12 is arranged inside the conversion box 11. The conversion flap 12 is connected to a handwheel 13. The handwheel 13 is used to drive the conversion flap 12 to rotate so that the conversion flap 12 blocks the first air outlet or the second air outlet, thereby realizing the trajectory switching of the flowing object 16 in the pipeline.

[0027] In this embodiment, the air inlet pipe 3, the connecting pipe 8, the first air outlet pipe 14 and the second air outlet pipe 10 are all transparent corrugated pipes with different lengths, and the connecting pipe 8, the first air outlet pipe 14 and the second air outlet pipe 10 are arranged in an irregular shape and intertwined on the display rack 5.

[0028] As Figure 1As shown, a feeding box baffle 7 is provided on the outer surface of the feeding box 6. The feeding box baffle 7 is made of relatively soft transparent rubber, and a horizontal slit is provided at the center of the feeding box baffle 7 to form a feeding port. Through the feeding port formed by the horizontal slit, the flowing object 16 can be put into the feeding box 6, and the feeding box baffle 7 can automatically reset by the flexibility of the material to ensure the sealed state of the feeding box 6.

[0029] As Figure 1 shown, the display rack 5 includes a first rack body and a second rack body. The feeding box 6 is arranged on the first rack body, and the conversion box 11 is arranged on the second rack body. The connecting pipe 8, the first air outlet pipe 14 and the second air outlet pipe 10 are respectively detachably connected through the connecting assembly 9 at the connection of the first rack body and the second rack body. When the demonstration device is running normally, the pipes on both sides of the display rack 5 are connected. When transportation is required, the demonstration device can be quickly disassembled into two parts on the left and right for easy transportation.

[0030] In this embodiment, the air box 1 is located at the bottom on one side of the display rack 5. The air inlet pipe 3 is connected to the bottom end of the feeding box 6. One end of the connecting pipe 8 is connected to the top end of the feeding box 6, and the other end is connected to the top end of the conversion box 11. The first air outlet and the second air outlet are both arranged at the bottom end of the conversion box 11. The first receiving box 4 and the second receiving box 15 are both fixed on the display rack 5. The flowing object 16 is ribbons of different materials and foam balls of different sizes and masses.

[0031] The working process of the demonstration device provided by the present utility model is as follows:

[0032] When the operator demonstrates, the fan 2 starts to work, and air starts to flow in the pipeline. The audience takes out the flowing object 16 from the first receiving box 4 or the second receiving box 15, puts the flowing object 16 through the feeding box baffle 7 into the feeding box 6, and the flowing object 16 then flows along the complex pipeline trajectory, generating an interesting flowing effect. It can be found that when the feeding box baffle 7 is separated, the airtightness of the feeding box 6 is weakened, and the flowing speed of the flowing object 16 is slower; when the feeding box baffle 7 closes and the feeding box 6 is closed, the flowing speed of the flowing object 16 is accelerated.

[0033] When the flowing object 16 flows to the conversion box 11, it will automatically flow to the air outlet pipe corresponding to the air outlet not blocked by the conversion flap 12. The audience can switch the selected air outlet by turning the handwheel 13. It can be observed that after the flowing object 16 flows out from the air outlet of the conversion box 11, its trajectory flows along the layout of the corresponding air outlet pipe, presenting a complex movement in different directions of up, down, left, right, inside and outside, showing uncertainty on the movement trajectory, allowing the audience to experience the interesting characteristics of air flow.

[0034] In the above solution, the demonstration device for showing the air flow characteristics funnily demonstrates the airtightness condition of air flow, the direction of air flow, and the suction and blowing effects on different objects by setting up a maze-like air duct circulation structure, enabling the audience to feel the charm of air flow characteristics.

[0035] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A demonstration device for displaying air flow characteristics, comprising a bellows and a display frame, wherein a fan is arranged inside the bellows, characterized in that: A feeding box and a conversion box are fixed on the display frame, the air outlet of the fan is connected to the feeding box through an air inlet duct, the feeding box is provided with a feeding port for feeding flowing objects, and the feeding box is connected to the conversion box through a connecting duct; The conversion box is provided with a first air outlet, the first air outlet is connected to the first air outlet duct, the end of the first air outlet duct is located in the first storage box, and the conversion box is also provided with a second air outlet, the second air outlet is connected to the second air outlet duct, and the end of the second air outlet duct is located in the second storage box.

2. The demonstration device for displaying air flow characteristics according to claim 1, characterized in that: A conversion paddle is disposed inside the conversion box, and the conversion paddle is connected to a hand wheel, and the hand wheel is used to drive the conversion paddle to rotate so that the conversion paddle blocks the first air outlet or the second air outlet.

3. The demonstration device for displaying air flow characteristics according to claim 1, characterized in that: The air inlet duct, the connecting duct, the first air outlet duct and the second air outlet duct are all transparent corrugated tubes, and the connecting duct, the first air outlet duct and the second air outlet duct are wound around the display frame in an irregular shape.

4. The demonstration device for displaying air flow characteristics according to claim 1, characterized in that: The outer surface of the feeding box is provided with a feeding box baffle, the material of the feeding box baffle is transparent rubber, and a horizontal slit is provided at the center of the feeding box baffle to form a feeding port.

5. The demonstration device for displaying air flow characteristics according to claim 1, characterized in that: The display rack includes a first frame and a second frame, the feeding box is arranged on the first frame, the conversion box is arranged on the second frame, and the connecting pipe, the first air outlet pipe and the second air outlet pipe are respectively connected at the connection point of the first frame and the second frame through a connecting component to realize detachable pipe connection.

6. The demonstration device for displaying air flow characteristics according to claim 1, characterized in that: The bellows is located at the bottom of one side of the display rack, the air inlet duct is connected to the bottom end of the feeding box, one end of the communication duct is connected to the top of the feeding box, and the other end is connected to the top of the conversion box, and the first air outlet and the second air outlet are both arranged at the bottom end of the conversion box.

7. The demonstration device for displaying air flow characteristics according to claim 1, characterized in that: The first storage box and the second storage box are both fixed on the display frame.

8. The demonstration device for displaying air flow characteristics according to any one of claims 1 to 7, characterized in that: The flowing objects are ribbons and / or foam balls.

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