A demonstration device for presenting the relationship between liquid pressure and gas pressure in a fluid and flow rate

Abstract

The utility model is suitable for demonstration teaching aid technical field provides a kind of demonstration device that present liquid pressure and gas pressure and flow rate relationship in fluid pressure, including support frame;Multiple clamps are fixed on the support frame;Coarse water channel and fine water channel in the clamp inside being clamped in the lower part of the support frame are connected, coarse gas channel and fine gas channel in the clamp inside being clamped in the upper part of the support frame are connected.The demonstration device that present liquid pressure and gas pressure and flow rate relationship provided by the scheme can adjust liquid flow rate and assist liquid backflow by setting water tank and coarse water channel, fine water channel are connected and backflow structure, overcome the problem such as limited total amount of liquid and prolong pressure liquid level difference holding time, by setting fan and coarse gas channel, fine gas channel are connected to build gas flow channel, by setting indicating part, liquid flow speed can be directly indicated, cooperate with the indication liquid height of connecting pipe, liquid pressure and gas pressure and flow rate relationship can be directly displayed.

Description

Technical Field

[0001] This utility model belongs to the field of demonstration teaching aids technology, and in particular relates to a demonstration device that presents the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure. Background Technology

[0002] The demonstration device for the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure is a device that integrates the functions of demonstrating gas and liquid pressure. It can intuitively show the relationship between pressure and flow velocity, and is convenient for teaching and experimental investigation. The existing demonstration devices have a relatively simple structure. When detecting liquid flow velocity and pressure, they mostly rely on gravity to make the liquid flow. The total amount of liquid and the flow velocity are limited, which makes the pressure-liquid level difference maintained for a short time, inconvenient to observe, and also makes it impossible to observe the gas flow velocity with the naked eye. Utility Model Content

[0003] This invention provides a demonstration device that presents the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure. It aims to solve the problems mentioned in the background art, such as the simple structure of the existing demonstration device, the direct use of gravity to make the liquid flow when detecting liquid flow velocity and pressure, the limited total amount of liquid and the limited flow velocity, the short duration of the pressure-liquid level difference, the inconvenience of observation, and the inability to observe gas flow velocity with the naked eye.

[0004] To solve the above problems, this utility model is implemented as follows: a demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure, comprising: a support frame; a water tank fixed on the support frame; multiple clamps fixed on the support frame; a coarse water channel and a fine water channel clamped in two clamps located at the lower part of the support frame, the coarse water channel and the fine water channel being connected, the coarse water channel being connected to the water tank; connecting pipes installed on the coarse water channel and the fine water channel respectively for indicating the liquid level difference generated by the pressure; a reflux structure disposed between the coarse water channel and the water tank for adjusting the liquid flow velocity and assisting the liquid reflux; a coarse air channel and a fine air channel respectively clamped on two clamps located at the upper part of the support frame, the coarse air channel and the fine air channel being connected, the coarse air channel and the fine air channel being connected to multiple connecting pipes respectively; a fan detachably installed on the support frame, the exhaust end of the fan being equipped with an exhaust pipe connected to the coarse air channel.

[0005] Preferably, the reflux structure includes a drain pipe installed at the drain end of the narrow channel, a water pump installed on the drain pipe, and a reflux pipe fixed at the drain end of the water pump and extending into the water tank. The drain pipe is provided with a regulating valve for adjusting the opening and closing of the pipe.

[0006] Preferably, each of the coarse air passage, fine air passage, coarse water passage, and fine water passage is provided with an indicator for indicating the gas-liquid flow rate. The indicator includes a fixed frame, a rotating shaft rotatably mounted on the fixed frame, and a fan blade mounted on the rotating shaft.

[0007] Preferably, the fan is covered with a protective shell for protecting the fan. The protective shell is installed on the support frame by fixing bolts. The protective shell is provided with a vent. A dustproof net for isolating dust and impurities is detachably installed on the protective shell.

[0008] Preferably, the water tank, coarse air duct, fine air duct, coarse water duct, and fine water duct are all made of transparent acrylic material to assist personnel in observation and indication, the connecting pipe is made of transparent glass, and the fan blade is made of carbon fiber.

[0009] Preferably, both the coarse air passage and the coarse water passage are equipped with silicone rings that contact the fine air passage and the fine water passage respectively to increase the connection sealing. The fine air passage is threaded onto the coarse air passage, and the fine water passage is threaded onto the coarse water passage.

[0010] Preferably, the side of the narrow air passage away from the wide air passage is provided with an exhaust pipe for outputting airflow, and the bottom of the support frame is fitted with a support block for stabilizing the support frame, and the support blocks are arranged in groups and are all conical.

[0011] Compared with related technologies, the demonstration device provided by this utility model, which presents the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure, has the following beneficial effects: Compared with existing technologies, the demonstration device presented in this solution, which shows the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure, can adjust the liquid flow velocity and assist liquid reflux by setting up a water tank connected to coarse and fine water channels and a reflux structure. This overcomes the problem of limited liquid volume and prolongs the time of pressure-liquid level difference maintenance. By setting up coarse and fine air channels to construct gas flow channels and connecting them to connecting pipes, the device can demonstrate changes in gas pressure and liquid level difference. The fan actively provides airflow and can adjust the wind force to enhance the diversity and controllability of the experiment. The gas-liquid flow velocity can be intuitively indicated by setting up indicators. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of a demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure, provided by this utility model; Figure 2 This is a schematic diagram of the main cross-sectional structure of the coarse air passage and the fine air passage in this utility model; Figure 3 This is a schematic diagram of the main sectional view of the coarse and fine water channels of this utility model; Figure 4for Figure 2 An enlarged structural diagram of part A shown in the figure; Figure 5 This is a schematic diagram of the assembly structure of the reflow structure in this utility model.

[0013] Reference numerals in the attached diagram: 1. Support frame; 2. Water tank; 3. Clamp; 4. Coarse air duct; 5. Fine air duct; 6. Coarse water duct; 7. Fine water duct; 8. Drain pipe; 9. Water pump; 10. Regulating valve; 11. Support block; 12. Connecting pipe; 13. Fan; 14. Exhaust pipe; 15. Return pipe; 16. Indicator; 17. Fixing frame; 18. Rotating shaft; 19. Fan blade. Detailed Implementation

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and 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 orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0015] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0016] This utility model provides a demonstration device for showing the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure, such as... Figure 1-5As shown, the demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure includes: a support frame 1; a water tank 2 fixed on the support frame 1; multiple clamps 3 fixed on the support frame 1; a coarse water channel 6 and a fine water channel 7 located in the two clamps 3 at the lower part of the support frame, the coarse water channel 6 and the fine water channel 7 being connected, the coarse water channel 6 being connected to the water tank 2; connecting pipes 12 installed on the coarse water channel 6 and the fine water channel 7 respectively for indicating the liquid level difference generated by the pressure; a reflux structure set between the coarse water channel 6 and the water tank 2 for adjusting the liquid flow velocity and assisting the liquid reflux; a coarse air channel 4 and a fine air channel 5 respectively clamped on the two clamps 3 at the upper part of the support frame, the coarse air channel 4 and the fine air channel 5 being connected, the coarse air channel 4 and the fine air channel 5 being connected to the multiple connecting pipes 12 respectively; a fan 13 detachably installed on the support frame 1, the exhaust end of the fan 13 being equipped with an exhaust pipe 14 connected to the coarse air channel 4.

[0017] In this embodiment, a support frame 1 provides a stable support structure for the demonstration device, ensuring its stability during the experiment. The water tank 2 is connected to the coarse water channel 6 and the fine water channel 7, and a reflux structure is used to adjust the liquid flow rate. This not only overcomes the problems of limited total liquid volume and insufficient flow rate in existing technologies but also extends the time for maintaining the pressure-level difference, facilitating observation. The clamp 3 facilitates the installation and fixation of the coarse water channel 6 and the fine water channel 7. The connection pipe 12 installed on the coarse water channel 6 and the fine water channel 7 visually demonstrates the relationship between liquid pressure and flow rate. The coarse air channel 4 and... The narrow air channel 5 is connected to the wide air channel 4, forming a channel for gas flow and providing a basic structure for demonstrating the relationship between gas pressure and flow rate. By connecting the wide air channel 4 and the narrow air channel 5 to multiple connecting pipes 12, the liquid level difference caused by changes in gas pressure can be visually displayed, making it easier to observe experimental phenomena. By detachably installing a fan 13 (taking RB-400A as an example) on the support frame 1 and connecting the exhaust end of the fan 13 to the wide air channel 4 using the exhaust pipe 14, the fan 13 can actively provide airflow. Furthermore, by adjusting the fan 13's airflow, the gas flow rate can be flexibly changed, enhancing the diversity and controllability of the experiment.

[0018] In a further preferred embodiment of the present invention, the reflux structure includes a drain pipe 8 installed at the drain end of the thin water channel 7, a water pump 9 installed on the drain pipe 8, and a reflux pipe 15 fixed at the drain end of the water pump 9 and extending into the water tank 2. The drain pipe 8 is provided with a regulating valve 10 for adjusting the opening and closing of the pipe.

[0019] In this embodiment, a drain pipe 8 is provided to facilitate the discharge of liquid from the narrow water channel 7, ensuring smooth liquid flow. By installing a water pump 9 (taking the D series as an example) and utilizing the power of the water pump 9, the liquid can be actively pumped back, overcoming the problem of limited flow rate when relying solely on gravity for reflux. By setting a return pipe 15, the liquid discharged by the water pump 9 is guided back into the water tank 2, realizing liquid recycling and extending the experimental time. By setting a regulating valve 10 on the drain pipe 8, the opening and closing of the pipe can be flexibly controlled, thereby adjusting the speed of liquid reflux.

[0020] In a further preferred embodiment of the present invention, each of the coarse air passage 4, fine air passage 5, coarse water passage 6 and fine water passage 7 is provided with an indicator 16 for indicating the gas-liquid flow rate. The indicator 16 includes a fixed frame 17, a rotating shaft 18 rotatably mounted on the fixed frame 17 and a fan blade 19 mounted on the rotating shaft 18.

[0021] In this embodiment, by setting indicators 16 in the coarse gas channel 4, fine gas channel 5, coarse water channel 6, and fine water channel 7, a direct indication of the gas-liquid flow rate is achieved, solving the problem that it was difficult to directly observe the flow rate in the past. The fixing frame 17 in the indicator 16 provides stable support for the rotating shaft 18, ensuring that the rotating shaft 18 can rotate smoothly. By rotating the rotating shaft 18 installed on the fixing frame 17 in conjunction with the fan blade 19, the fan blade 19 can rotate with the power generated by the gas-liquid flow. Its rotation speed is related to the gas-liquid flow rate. By observing the rotation of the fan blade 19, the magnitude of the gas-liquid flow rate can be clearly determined, making the experimental phenomenon more obvious.

[0022] In a further preferred embodiment of the present invention, the fan 13 is covered with a protective shell for protecting the fan 13. The protective shell is installed on the support frame 1 by fixing bolts. The protective shell is provided with a vent. A dustproof net for isolating dust and impurities is detachably installed on the protective shell.

[0023] In this embodiment, by installing a protective shell over the fan 13, reliable protection is provided for the fan 13, preventing it from being damaged by accidental collisions during the experiment and extending the service life of the fan 13. By setting vents on the protective shell, ventilation and heat dissipation are ensured while maintaining the airflow required for the normal operation of the fan 13. By setting a dustproof net, dust and impurities can be effectively isolated to prevent them from entering the fan 13 and affecting its performance, and it is also convenient to clean and replace it regularly.

[0024] In a further preferred embodiment of this utility model, the water tank 2, the coarse air duct 4, the fine air duct 5, the coarse water duct 6, and the fine water duct 7 are all made of transparent acrylic material to assist personnel in observing the indicator 16, the connecting pipe 12 is made of transparent glass, and the fan blade 19 is made of carbon fiber.

[0025] In this embodiment, by making the water tank 2, coarse air channel 4, fine air channel 5, coarse water channel 6, and fine water channel 7 transparent acrylic material, personnel can clearly observe the rotation of the internal indicator 16 and intuitively understand the gas-liquid flow rate, thus enhancing the visibility of the experimental phenomenon. The transparent glass connecting pipe 12 also facilitates the observation of the liquid level difference generated by the pressure, making experimental observation convenient. The carbon fiber fan blade 19 has the characteristics of being lightweight and high-strength, with low inertia when rotating, and can rotate more sensitively with changes in gas-liquid flow rate, accurately reflecting the flow rate.

[0026] In a further preferred embodiment of the present invention, both the coarse air passage 4 and the coarse water passage 6 are equipped with silicone rings that respectively contact the fine air passage 5 and the fine water passage 7 to increase the connection sealing. The fine air passage 5 is threadedly installed on the coarse air passage 4, and the fine water passage 7 is threadedly installed on the coarse water passage 6.

[0027] In this embodiment, by installing silicone rings on the coarse air passage 4 and coarse water passage 6, and making them contact the fine air passage 5 and fine water passage 7 respectively, the good elasticity and sealing properties of the silicone rings effectively fill the gaps at the connection, greatly increasing the sealing of the connection, preventing gas or liquid leakage, and ensuring the accuracy of experimental data. By threading the fine air passage 5 onto the coarse air passage 4 and the fine water passage 7 onto the coarse water passage 6, installation and disassembly are not only more convenient, but also facilitate the cleaning of the air passages and water passages.

[0028] In a further preferred embodiment of the present invention, the side of the fine air passage 5 away from the coarse air passage 4 is provided with a tailpipe for outputting airflow, and the bottom of the support frame 1 is provided with a support block 11 for stabilizing the support frame 1. The support blocks 11 are arranged in groups and are all conical.

[0029] In this embodiment, by setting the tail gas pipe on the side of the narrow air channel 5 away from the wide air channel 4, the airflow can be guided in an orderly manner, avoiding the disorderly diffusion of airflow from interfering with the experimental environment. At the same time, it also helps to maintain a stable pressure environment in the air channel, making the demonstration of the relationship between gas pressure and flow rate more accurate. By setting a group of conical support blocks 11 at the bottom of the support frame 1, the contact stability with the placement surface is increased, making the support frame 1 more stable and reducing the error caused by shaking during the experiment.

[0030] In summary, compared with related technologies, this device can adjust the liquid flow rate and assist liquid reflux by setting up a water tank 2 connected to a coarse water channel 6 and a fine water channel 7, as well as a reflux structure. This overcomes the problem of limited liquid volume and prolongs the pressure-liquid level difference maintenance time. By setting up a coarse air channel 4 and a fine air channel 5 to construct a gas flow channel and connecting it to a connecting pipe 12, the gas pressure change and liquid level difference can be displayed. The fan 13 actively provides airflow and can adjust the wind force to enhance the diversity and controllability of the experiment. The indicator 16 can intuitively indicate the gas-liquid flow rate.

[0031] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure, characterized in that, include: Support frame; A water tank fixed to the support frame; Multiple clamps fixed to the support frame; A coarse water channel and a fine water channel are fitted into two clamps located at the lower part of the support frame. The coarse water channel and the fine water channel are connected to each other, and the coarse water channel is connected to the water tank. Connecting pipes, respectively installed on the coarse and fine water channels, are used to indicate the liquid level difference generated by the pressure. A reflux structure is provided between the coarse water channel and the water tank to regulate the liquid flow rate and assist the liquid reflux. Two clamps located on the upper part of the support frame are respectively equipped with a coarse air passage and a fine air passage. The coarse air passage and the fine air passage are connected to each other and are respectively connected to multiple connecting pipes. A fan is detachably installed on the support frame, and an exhaust pipe connected to the coarse air passage is installed at the exhaust end of the fan.

2. The demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure as described in claim 1, characterized in that, The reflux structure includes a drain pipe installed at the drain end of the narrow channel, a water pump installed on the drain pipe, and a reflux pipe fixed at the drain end of the water pump and extending into the water tank. The drain pipe is equipped with a regulating valve for adjusting the opening and closing of the pipe.

3. The demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure as described in claim 1, characterized in that, Each of the coarse air passage, fine air passage, coarse water passage, and fine water passage is equipped with an indicator for indicating the gas-liquid flow rate. The indicator includes a fixed frame, a rotating shaft rotatably mounted on the fixed frame, and a fan blade mounted on the rotating shaft.

4. The demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure as described in claim 1, characterized in that, The fan is covered with a protective shell to protect the fan. The protective shell is installed on the support frame by fixing bolts. The protective shell is provided with a vent. A dustproof net for isolating dust and impurities can be detachably installed on the protective shell.

5. The demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure as described in claim 3, characterized in that, The water tank, coarse air duct, fine air duct, coarse water duct, and fine water duct are all made of transparent acrylic material to assist personnel in observation and indication. The connecting pipe is made of transparent glass, and the fan blade is made of carbon fiber.

6. The demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure as described in claim 1, characterized in that, Both the coarse air passage and the coarse water passage are equipped with silicone rings that contact the fine air passage and the fine water passage respectively to increase the connection sealing. The fine air passage is threaded onto the coarse air passage, and the fine water passage is threaded onto the coarse water passage.

7. The demonstration device for presenting the relationship between liquid pressure and gas pressure and flow velocity in fluid pressure as described in claim 1, characterized in that, The narrow air passage is provided with an exhaust pipe for outputting airflow on the side away from the wide air passage, and the bottom of the support frame is fitted with a support block for stabilizing the support frame. The support blocks are arranged in groups and are all conical.

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