Device for demonstrating principle of narrow tube effect

Abstract

The utility model belongs to the technical field of physical experiment or education demonstration devices, and particularly relates to a narrow tube effect principle demonstration device which comprises a base. A fan is fixedly installed in the air duct, one end of the air duct is fixedly connected with an air duct, rotating shafts are arranged on the two sides in the end, connected with the air duct, of the air duct, adjusting plates are rotationally arranged on the two sides in one end of the air duct, one ends of the adjusting plates are fixedly installed on the rotating shafts, and a guide rail is fixedly installed at the top in the other end of the air duct. A sliding support is slidably installed on the guide rail, a rotating rod is rotatably installed at the bottom of the sliding support, the lower end of the rotating rod penetrates through the bottom of the sliding support and is fixedly provided with a fixing block, and wind cups are fixedly installed on the periphery of the fixing block; the width of the air duct is changed by adjusting the angle of the adjusting plate, and the rotating speed of the wind cup is observed, so that the device not only provides an intuitive experimental tool for teaching and scientific research, but also deepens the understanding and understanding of the principle of the narrow tube effect.

Description

Technical Field

[0001] The utility model relates to the technical field of physical experiments or educational demonstration devices, in particular to a device for demonstrating the principle of a narrow tube effect. Background Art

[0002] The narrow channel effect primarily describes the phenomenon in which airflow accelerates and wind speed increases when passing through narrow terrain due to the narrowing of the channel. The narrow channel effect principle demonstration device is designed to intuitively demonstrate the physical phenomenon of the narrow channel effect.

[0003] The device for demonstrating the principle of the narrow channel effect usually includes a fan, a pipe and an anemometer. The wind source is turned on and the wind speed measuring device is used to measure the speed of the airflow. Then, a narrow channel is placed between the wind source and the wind speed measuring device, and the wind speed measuring device is used again to measure the speed of the airflow after passing through the narrow channel.

[0004] The principle of the narrow pipe effect involves multiple disciplines, such as physics, meteorology, urban planning, and architectural design. Currently, there is no demonstration device that can be used for experiments or teaching to intuitively demonstrate the narrow pipe effect. Therefore, a demonstration device for the principle of the narrow pipe effect is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology, the principle of the narrow tube effect involves multiple disciplines, such as physics, meteorology, urban planning, architectural design, etc. At present, there is no demonstration device that can be used for experiments or teaching to intuitively demonstrate the narrow tube effect. The utility model proposes a demonstration device for the principle of the narrow tube effect.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: a device for demonstrating the principle of narrow pipe effect described in the present invention comprises a base; a wind tube is fixedly installed on the upper part of one end of the base, a fan is fixedly installed inside the wind tube, an air duct is fixedly connected to one end of the wind tube, rotating shafts are provided on both sides of one end where the air duct and the wind tube are connected, both ends of the rotating shafts are rotatably installed in the air duct through bearings, and turbines are fixedly installed on the upper ends passing through the air duct, a connecting shaft is provided on one side of the turbine, both ends of the connecting shafts are rotatably installed on the top of the air duct through bearings, and rotating shafts are provided on both sides inside one end of the air duct. An adjustment plate is provided, one end of the adjustment plate is fixedly mounted on the rotating shaft, a guide rail is fixedly mounted on the top inner of the other end of the air duct, a plurality of tooth grooves are arranged in an array at the bottom of the guide rail, a sliding bracket is slidably mounted on the guide rail, a rotating rod is rotatably mounted on the bottom of the sliding bracket, the lower end of the rotating rod passes through the bottom of the sliding bracket and is fixedly mounted with a fixed block, wind cups are fixedly mounted all around the fixed block, the width of the air duct is changed by adjusting the angle of the adjustment plate, and combined with observing the rotation speed of the wind cup, this device not only provides an intuitive experimental tool for teaching and scientific research, but also deepens the understanding and knowledge of the principle of the narrow tube effect.

[0007] Preferably, worms are fixedly mounted on both ends of the connecting shaft. The interaction between the worms and the turbine is achieved through the meshing of their teeth. By mounting worms on both ends of the connecting shaft and meshing with the turbine, a non-direct manual adjustment method for the adjustment plate is achieved. This design not only improves the accuracy and stability of the adjustment, but also makes the adjustment process more labor-saving and easier to control.

[0008] Preferably, an adjusting gear is fixedly installed in the center of the connecting shaft, and slide rails are provided on both sides below the adjusting gear and fixedly installed on the top of the air duct. A tooth plate is slidably installed inside the slide rail, and the teeth on the tooth plate and the tooth grooves on the tooth plate are engaged with each other. Through the stability of the gear and tooth plate transmission, this adjustment method can ensure the continuous and smooth change of the air duct width, thereby more accurately displaying the changing process of the narrow tube effect.

[0009] Preferably, a cylinder is provided at one end of the slide rail and fixedly installed on the top of the air duct, a fixed plate is fixedly installed on the upper part of one end of the tooth plate, and the front end of the cylinder piston rod is fixedly connected to the fixed plate. By controlling the extension and contraction of the cylinder, the tooth plate can be easily pushed or pulled, thereby quickly adjusting the width of the air duct.

[0010] Preferably, a motor is fixedly installed on one side of the upper end of the sliding bracket, a fixed shaft is rotatably installed inside the upper end of the sliding bracket, a driving gear is fixedly installed in the center of the fixed shaft, the teeth on the driving gear are engaged with the teeth at the bottom of the guide rail, and the motor rotating shaft is fixedly connected to one end of the fixed shaft. By controlling the rotation direction and speed of the motor, the position of the sliding bracket on the guide rail can be accurately controlled, thereby conveniently adjusting the airflow contact between the wind cup and different positions of the air duct, and further observing the performance of the narrow tube effect at different positions.

[0011] Preferably, a sensor is fixedly installed inside the sliding bracket, and the upper end of the rotating rod passes through the bottom of the fixed bracket and is rotatably installed inside the sensor. The introduction of the sensor enables the device to monitor the rotation speed and direction of the wind cup in real time, thereby quantifying the influence of the narrow tube effect on the wind speed.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model simulates the narrow tube effect principle by using a demonstration device. When the fan is started, negative pressure is formed in the wind tube, and the outside air is drawn from one end of the wind tube and then blown into the air duct. The motor is started to drive the driving gear to rotate through the fixed shaft. The driving gear drives the sliding bracket to move in the air duct under the action of the tooth groove at the bottom of the guide rail, and at the same time drives the wind cup to move to different positions. The placement position of the wind cup is adjusted to explore its specific impact on the wind speed measurement value at different distances from the air outlet. Under the blowing of the fan, the wind cup drives the rotating rod to rotate in the sensor through the fixed block to record the wind speed. Then, the cylinder is started to push the tooth plate to slide in the slide rail through the fixed block. The tooth plate moves The adjusting gear drives the connecting shaft to rotate, the connecting shaft drives the worm gears at both ends to drive the turbine to rotate, and the turbine drives the adjusting plate to rotate through the rotating shaft, so that openings of different sizes are formed between the two adjusting plates, and then the motor is started to adjust the position of the wind cup again. The structural design for wind speed recording realizes the function of simulating the demonstration of the principle of the narrow pipe effect, and solves the problem that the principle of the narrow pipe effect involves multiple disciplines, such as physics, meteorology, urban planning, architectural design, etc. There is currently no demonstration device that can be used for experiments or teaching to intuitively demonstrate the narrow pipe effect. It not only deepens students' understanding of the principle of the narrow pipe effect, but also stimulates their interest and desire to explore related disciplines. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of one side of the demonstration device;

[0016] Figure 2 This is a schematic diagram of the overall structure of the other side of the demonstration device;

[0017] Figure 3 Schematic diagram of the angle adjustment device structure;

[0018] Figure 4 This is a schematic diagram of the internal structure of the demonstration device;

[0019] Figure 5 Schematic diagram of the distance adjustment device structure.

[0020] In the figure: 1. Base; 2. Air cylinder; 3. Air duct; 4. Fan; 5. Rotating shaft; 6. Turbine; 7. Connecting shaft; 8. Turbine rod; 9. Adjusting gear; 10. Slide rail; 11. Tooth plate; 12. Fixed plate; 13. Cylinder; 14. Adjusting plate; 15. Guide rail; 16. Sliding bracket; 17. Motor; 18. Fixed shaft; 19. Driving gear; 20. Sensor; 21. Rotating rod; 22. Fixed block; 23. Wind cup. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-5The wind turbine 6 is connected with the wind pipe 3 by the support arm 21, and the wind turbine 6 is connected with the support arm 22. 2 has wind cups 23 fixedly installed on all sides. During operation, when using the demonstration device to simulate the principle of the narrow channel effect, the fan 4 is started to run, forming a negative pressure in the wind tube 2, drawing outside air from one end of the wind tube 2 and blowing it into the air duct 3. The motor 17 is started to rotate the driving gear 19 through the fixed shaft 18. The driving gear 19 drives the sliding bracket 16 to move in the air duct 3 under the action of the teeth and grooves at the bottom of the guide rail 15, and at the same time drives the wind cups 23 to different positions. Under the blowing of the fan 4, the wind cups 23 drive the rotating rod 21 to rotate in the sensor 20 through the fixed block 22 to record the wind speed. Then, the cylinder 13 is started to push the toothed plate 11 to slide in the slide rail 10 through the fixed plate 12. The toothed plate 11 drives the connecting shaft 7 to rotate through the adjusting gear 9. The connecting shaft 7 drives the worm gears 8 at both ends to drive the turbine 6 to rotate. The turbine 6 drives the adjusting plate 14 to rotate through the rotating shaft 5, so that openings of different sizes are formed between the two adjusting plates 14. Then, the motor 17 is started to adjust the position of the wind cups 23 again to record the wind speed.

[0023] Turbine rods 8 are fixedly mounted at both ends of the connecting shaft 7, and the interaction between the vortex rods 8 and the turbine 6 is achieved by the mutual engagement of their teeth; during operation, when a demonstration device is used to simulate the principle of the narrow tube effect, the connecting shaft 7 drives the vortex rods 8 at both ends to drive the turbine 6 to rotate, and the turbine 6 drives the adjustment plate 14 to rotate through the rotating shaft 5, so that openings of different sizes are formed between the two adjustment plates 14.

[0024] An adjusting gear 9 is fixedly installed in the center of the connecting shaft 7, and slide rails 10 are provided on both sides below the adjusting gear 9 and fixedly installed on the top of the air duct 3. A tooth plate 11 is slidably installed inside the slide rail 10, and the teeth on the tooth plate 11 are engaged with the tooth grooves on the tooth plate 11; when working, when using a demonstration device to simulate the principle of the narrow tube effect, the tooth plate 11 drives the connecting shaft 7 to rotate through the adjusting gear 9, and the connecting shaft 7 drives the vortex rods 8 at both ends to drive the turbine 6 to rotate, and the turbine 6 drives the adjusting plate 14 to rotate through the rotating shaft 5, so that openings of different sizes are formed between the two adjusting plates 14.

[0025] A cylinder 13 is provided at one end of the slide rail 10 and fixedly installed on the top of the air duct 3. A fixed plate 12 is fixedly installed on the upper part of one end of the tooth plate 11. The front end of the piston rod of the cylinder 13 is fixedly connected to the fixed plate 12. When working, when using a demonstration device to simulate the principle of the narrow tube effect, the cylinder 13 is started to push the tooth plate 11 to slide in the slide rail 10 through the fixed plate 12, and the adjusting gear 9 is driven to rotate through the tooth plate 11.

[0026] A motor 17 is fixedly installed on one side of the upper end of the sliding bracket 16, and a fixed shaft 18 is rotatably installed inside the upper end of the sliding bracket 16. A driving gear 19 is fixedly installed in the center of the fixed shaft 18. The teeth on the driving gear 19 are engaged with the teeth at the bottom of the guide rail 15, and the rotating shaft of the motor 17 is fixedly connected to one end of the fixed shaft 18; when working, by using a demonstration device to simulate the principle of the narrow tube effect, the starting motor 17 drives the driving gear 19 to rotate through the fixed shaft 18, and the driving gear 19 drives the sliding bracket 16 to move in the air duct 3 under the action of the teeth at the bottom of the guide rail 15, and at the same time drives the wind cup 23 to move to different positions.

[0027] A sensor 20 is fixedly installed inside the sliding bracket 16, and the upper end of the rotating rod 21 passes through the bottom of the fixed bracket and is rotatably installed inside the sensor 20; when working, when using a demonstration device to simulate the principle of the narrow tube effect, the wind cup 23 drives the rotating rod 21 to rotate inside the sensor 20 through the fixed block 22 under the blowing of the fan 4 to record the wind speed.

[0028] Working principle: When using the demonstration device to simulate the principle of narrow channel effect, the fan 4 is started to run, negative pressure is formed in the wind tube 2, and the outside air is extracted from one end of the wind tube 2 and then blown into the inside of the air duct 3. The motor 17 is started to drive the driving gear 19 to rotate through the fixed shaft 18. The driving gear 19 drives the sliding bracket 16 to move in the air duct 3 under the action of the tooth groove at the bottom of the guide rail 15, and at the same time drives the wind cup 23 to move to different positions. Under the blowing of the fan 4, the wind cup 23 drives the rotating rod 21 to rotate in the sensor 20 through the fixed block 22 to record the wind speed. Then, the cylinder 13 is started to push the tooth plate 11 to slide in the slide rail 10 through the fixed plate 12. The tooth plate 11 drives the connecting shaft 7 to rotate through the adjusting gear 9. The connecting shaft 7 drives the vortex rods 8 at both ends to drive the turbine 6 to rotate. The turbine 6 drives the adjusting plate 14 to rotate through the rotating shaft 5, so that openings of different sizes are formed between the two adjusting plates 14. Then, the motor 17 is started to adjust the position of the wind cup 23 again to record the wind speed, completing the experimental demonstration of the principle of narrow channel effect.

[0029] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A device for demonstrating the principle of narrow pipe effect, characterized by: The invention comprises a base (1); a wind tube (2) is fixedly installed on the upper part of one end of the base (1); a fan (4) is fixedly installed inside the wind tube (2); an air duct (3) is fixedly connected to one end of the wind tube (2); a rotating shaft (5) is provided on both sides of one end of the connection between the wind duct (3) and the wind tube (2); both ends of the rotating shaft (5) are rotatably installed in the wind duct (3) through bearings, and a turbine (6) is fixedly installed on the upper end of each rotating shaft that passes through the wind duct (3); a connecting shaft (7) is provided on one side of the turbine (6); both ends of the connecting shaft (7) are rotatably installed on the top of the wind duct (3) through bearings; the wind duct (3) An adjusting plate (14) is rotatably provided on both sides of one end of the interior, and one end of the adjusting plate (14) is fixedly mounted on the rotating shaft (5). A guide rail (15) is fixedly mounted on the top of the other end of the air duct (3). A plurality of tooth grooves are arranged in an array at the bottom of the guide rail (15). A sliding bracket (16) is slidably mounted on the guide rail (15). A rotating rod (21) is rotatably mounted on the bottom of the sliding bracket (16). The lower end of the rotating rod (21) passes through the bottom of the sliding bracket (16) and is fixedly mounted with a fixed block (22). Wind cups (23) are fixedly mounted on all four sides of the fixed block (22).

2. A device for demonstrating the principle of narrow pipe effect according to claim 1, characterized in that: Turbine rods (8) are fixedly mounted on both ends of the connecting shaft (7), and the interaction between the vortex rod (8) and the turbine (6) is achieved by the mutual meshing of their teeth.

3. The device for demonstrating the principle of narrow pipe effect according to claim 1, characterized in that: An adjusting gear (9) is fixedly installed at the center of the connecting shaft (7), and slide rails (10) are provided on both sides below the adjusting gear (9) and fixedly installed on the top of the air duct (3). A tooth plate (11) is slidably installed inside the slide rail (10), and the teeth on the tooth plate (11) are meshed with the tooth grooves on the tooth plate (11).

4. The device for demonstrating the principle of narrow pipe effect according to claim 3, characterized in that: A cylinder (13) is provided at one end of the slide rail (10) and is fixedly mounted on the top of the air duct (3); a fixed plate (12) is fixedly mounted on the upper portion of one end of the tooth plate (11); and a front end of a piston rod of the cylinder (13) is fixedly connected to the fixed plate (12).

5. The device for demonstrating the principle of narrow pipe effect according to claim 1, characterized in that: A motor (17) is fixedly mounted on one side of the upper end of the sliding bracket (16), a fixed shaft (18) is rotatably mounted inside the upper end of the sliding bracket (16), a driving gear (19) is fixedly mounted in the center of the fixed shaft (18), the upper teeth of the driving gear (19) are meshed with the tooth grooves at the bottom of the guide rail (15), and the rotating shaft of the motor (17) is fixedly connected to one end of the fixed shaft (18).

6. The device for demonstrating the principle of narrow pipe effect according to claim 1, characterized in that: A sensor (20) is fixedly installed inside the sliding bracket (16), and the upper end of the rotating rod (21) passes through the bottom of the fixed bracket and is rotatably installed inside the sensor (20).

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