A variable pressure two-body hydrostatic experimental device

Abstract

This invention proposes a variable-pressure two-body hydrostatic experimental device, belonging to the field of fluid mechanics experimental apparatus technology. The experimental device includes a main housing, within which are a first measuring chamber and a second measuring chamber. The main housing is equipped with a first air bladder and a second air bladder, as well as a first pressure measuring tube, a first U-shaped tube, a second pressure measuring tube, and a second U-shaped tube. The main housing has a first injection port and a second injection port, respectively connected to the first and second measuring chambers, and both the first and second injection ports are equipped with sealing elements. The purpose of this invention is to provide a variable-pressure two-body hydrostatic experimental device that makes hydrostatic experiments more practical and convenient, allows for wider placement, simplifies operation steps, improves experimental efficiency, and thus effectively saves time and costs, improving classroom efficiency.

Description

Technical Field

[0001] This invention relates to the field of fluid mechanics experimental apparatus, and more specifically, to a variable pressure two-body hydrostatic experimental device. Background Technology

[0002] With the rapid development of the world economy, science and technology, culture and education, and the gradual improvement of people's living standards, people have increasingly higher requirements for education and more stringent demands on teaching conditions. Integrated practical activities courses help cultivate students' observation skills, experience the power of teamwork, and enhance collective cohesion. Therefore, universities are increasingly emphasizing the experimental process in various disciplines. Good experimental courses can help students better understand theoretical knowledge, and this is also true in fluid mechanics. Furthermore, experimental apparatus has a profound impact on the experimental process.

[0003] Currently available hydrostatic experimental setups mostly require placement on an experimental platform due to the nature of their operating components, rather than on a lectern. This occupies a significant amount of experimental space and results in unnecessary resource waste. Furthermore, reducing the air pressure in the water tank during the experiment requires opening the bottom drain valve to release water, making the overall experimental operation cumbersome. Moreover, existing hydrostatic experimental setups are single-unit devices, meaning they contain only one water tank. A single operation can only obtain one set of data, requiring multiple experiments to obtain multiple sets of data, which consumes a significant amount of experimental time and results in low experimental efficiency.

[0004] In summary, we propose a variable pressure two-body hydrostatic experimental device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a variable pressure two-body hydrostatic experimental device, which makes the hydrostatic experimental device more practical and convenient, allows for a wider placement area, simplifies operation steps, improves experimental efficiency, and thus effectively saves time and costs, and improves classroom efficiency.

[0006] The embodiments of the present invention are implemented as follows:

[0007] A variable pressure dual-body hydrostatic experimental device includes a main housing, which contains a first measuring chamber and a second measuring chamber. The main housing is equipped with a first air bladder for pumping gas from the second measuring chamber into the first measuring chamber, and a second air bladder for pumping gas from the first measuring chamber into the second measuring chamber. The main housing is also equipped with a first pressure measuring tube and a first U-shaped tube connected to the first measuring chamber, and a second pressure measuring tube and a second U-shaped tube connected to the second measuring chamber. The main housing has a first injection port and a second injection port connected to the first and second measuring chambers, respectively, and both the first and second injection ports are equipped with seals.

[0008] The water valve that creates the pressure drop phenomenon in existing equipment is eliminated. One-way first and second air bladders are used to change the gas pressure in the first and second measuring chambers of the main chamber. Because the lower water valve is eliminated, this embodiment of the invention can be placed directly on a test bench or desk. The elimination of the support frame design prevents the base from oxidizing due to water corrosion, effectively protecting the cleanliness of the experimental table. The change in liquid column height in the first and second U-shaped tubes connected to the side wall of the main chamber is used for display, allowing simultaneous experiments in both the first and second measuring chambers within the main chamber. This simplifies the operation steps while increasing the data obtained per operation, effectively saving time and cost and improving classroom experiment efficiency. The main chamber has a first and second inlet, used not only for the release and entry of water from the tank but also for balancing the air pressure inside and outside the tank during experiments.

[0009] In some embodiments of the present invention, the sealing element is a wooden plug.

[0010] The cork should have moderate density and hardness, good flexibility and elasticity, and should not easily undergo chemical reactions.

[0011] In some embodiments of the present invention, both the first U-tube and the second U-tube are provided with a first valve.

[0012] The first valve can be a ball valve. When the air pressure is not being measured, the first valve can be closed, and it can be opened when measurement is required.

[0013] In some embodiments of the present invention, the main housing is provided with a third pressure measuring tube connected to the first measuring cavity below the first pressure measuring tube, and the main housing is provided with a fourth pressure measuring tube connected to the second measuring cavity below the second pressure measuring tube.

[0014] The surveyor can measure the absolute and relative pressure using the first, second, third, and fourth pressure measuring tubes, as well as the first and second U-tubes, and verify the hydrostatic equations.

[0015] In some embodiments of the present invention, the main housing is provided with a first support plate, a second support plate, a third support plate and a fourth support plate, the first pressure measuring tube and the third pressure measuring tube are both connected to the first support plate, the second pressure measuring tube and the fourth pressure measuring tube are both connected to the second support plate, the first U-shaped tube is connected to the third support plate and the second U-shaped tube is connected to the fourth support plate.

[0016] This design effectively supports and stabilizes the first, second, third, and fourth pressure measuring tubes, as well as the first and second U-shaped tubes, preventing deformation.

[0017] In some embodiments of the present invention, the first support plate is provided with a first measuring ruler, the two sides of which abut against the ring sides of the first pressure measuring tube and the third pressure measuring tube, respectively; the second support plate is provided with a second measuring ruler, the two sides of which abut against the ring sides of the first pressure measuring tube and the fourth pressure measuring tube, respectively.

[0018] The inclusion of a first and second measuring ruler facilitates direct data reading for personnel to a certain extent.

[0019] In some embodiments of the present invention, the third support plate is provided with a third measuring ruler, which abuts against the first U-shaped tube, and the fourth support plate is provided with a fourth measuring ruler, which abuts against the second U-shaped tube.

[0020] The third measuring ruler allows researchers to more accurately measure changes in air pressure intensity, thereby providing more precise data for the subsequent verification of the hydrostatic equations and ensuring data accuracy.

[0021] In some embodiments of the present invention, the main housing is a transparent housing.

[0022] The transparent enclosure allows researchers to clearly see the liquid level when adding liquid water to the first and second measuring chambers, preventing the amount of liquid water added from being too much or too little.

[0023] In some embodiments of the present invention, a protective sleeve is provided at the bottom of the main housing, and anti-slip texture is provided on the ring side of the protective sleeve.

[0024] The protective sleeve uses silicone to cover the side wall of the main container and protect its bottom, preventing personnel from damaging the main container when handling the liquid water. The anti-slip texture can prevent the handling personnel from slipping when carrying the main container, making the handling process more stable.

[0025] In some embodiments of the present invention, the first airbag is provided with a second valve, and the second airbag is provided with a third valve.

[0026] This design can enhance the gas sealing effect of the first and second air chambers when they are not in operation, thus ensuring experimental accuracy.

[0027] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0028] 1) This experimental device eliminates the water valve that creates the air pressure drop phenomenon in existing equipment. It uses a one-way first and second air bladder to change the gas pressure in the first and second measuring chambers in the main chamber, and displays the change in the height of the liquid column in the first and second U-shaped tubes connected to the side wall of the main chamber. This allows the embodiment of the invention to be placed directly on the test bench or desk, which broadens its placement options, effectively protects the cleanliness of the test bench, simplifies the operation steps, and increases the amount of data obtained in a single operation, effectively saving time and costs and improving the efficiency of classroom experiments.

[0029] 2) In this experimental setup, a first inlet and a second inlet are provided in the main body of the tank. These are used not only for the release and entry of water into the tank, but also for balancing the air pressure inside and outside the tank during the experiment. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural view of a variable pressure two-body hydrostatic experimental device according to one embodiment of the present invention;

[0032] Figure 2 This is a structural view of a variable pressure two-body hydrostatic experimental device according to one embodiment of the present invention;

[0033] Figure 3 This is a partial structural view of a variable pressure two-body hydrostatic experimental device according to one embodiment of the present invention.

[0034] Icons: 1-Main housing, 2-First measuring chamber, 3-Second measuring chamber, 4-First air bladder, 5-Second air bladder, 6-First U-tube, 7-Second U-tube, 8-First injection port, 9-Second injection port, 10-Seal, 11-First valve, 12-Third pressure measuring tube, 13-Fourth pressure measuring tube, 14-First support plate, 15-Second support plate, 16-Third support plate, 17-Fourth support plate, 18-First measuring ruler, 19-Second measuring ruler, 20-Third measuring ruler, 21-Fourth measuring ruler, 22-Protective sleeve, 23-Anti-slip texture, 24-First pressure measuring tube, 25-Second pressure measuring tube, 26-Second valve, 27-Third valve. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they 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. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the embodiments of the present invention, "multiple" means at least two.

[0041] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0042] Example

[0043] Please refer to Figures 1-3 The purpose of this invention is to provide a variable pressure two-body hydrostatic experimental device, which makes the hydrostatic experimental device more practical and convenient, has a wider placement area, simplifies the operation steps, improves experimental efficiency, and thus effectively saves time and costs and improves classroom efficiency.

[0044] A variable pressure dual-body hydrostatic experimental device includes a main housing 1, which contains a first measuring chamber 2 and a second measuring chamber 3. The main housing 1 is equipped with a first air bladder 4 for injecting gas from the second measuring chamber 3 into the first measuring chamber 2, and a second air bladder 5 for injecting gas from the first measuring chamber 2 into the second measuring chamber 3. The main housing 1 is also equipped with a first pressure measuring tube 24 and a first U-shaped tube 6 connected to the first measuring chamber 2, a second pressure measuring tube 25 and a second U-shaped tube 7 connected to the second measuring chamber 3, and a first injection port 8 and a second injection port 9 connected to the first measuring chamber 2 and the second measuring chamber 3, respectively. Both the first injection port 8 and the second injection port 9 are equipped with a sealing element 10.

[0045] The principle of this invention: Due to the nature of the operating components, most existing fluid statics experimental devices need to be placed on an experimental platform and cannot be placed directly on a podium, which occupies a lot of experimental space and causes unnecessary waste of resources. In addition, when reducing the air pressure in the water tank during the experiment, the bottom drain valve needs to be opened to release water, making the overall experimental operation cumbersome. Moreover, the existing fluid statics experimental devices are single devices, that is, there is only one water tank, and only one set of data can be obtained in a single operation. In order to obtain multiple sets of data, multiple experiments need to be carried out, which consumes a lot of experimental time and results in low experimental efficiency. In this embodiment of the invention, the water valve that creates the pressure drop phenomenon in existing equipment is eliminated. One-way first air bladder 4 and second air bladder 5 are used to change the gas pressure in the first measuring chamber 2 and the second measuring chamber 3 of the main chamber 1. Because the lower water valve is eliminated, this embodiment of the invention can be placed directly on a test bench or desk. The elimination of the support frame design prevents the base from oxidizing due to water corrosion, effectively protecting the cleanliness of the experimental table. The change in the height of the liquid column in the first U-shaped tube 6 and the second U-shaped tube 7, which are connected to the side wall of the main chamber 1, is used for display. This allows experiments to be conducted simultaneously in both the first and second measuring chambers 3 within the main chamber 1, simplifying the operation steps while increasing the data obtained per operation, effectively saving time and cost and improving experimental efficiency. The main chamber 1 has a first inlet 8 and a second inlet 9, which are used not only for the release and entry of water from the tank but also for balancing the air pressure inside and outside the tank during the experiment.

[0046] The first U-shaped tube 6, the second U-shaped tube 7, the first pressure measuring tube 24, and the second pressure measuring tube 25 are all transparent tubes. In the experiment to verify the equation of incompressible hydrostatics (i.e., using the experimental device in this embodiment of the invention), the experimental liquid (represented by liquid water directly below) is first injected into the first measuring chamber 2 and the second measuring chamber 3 inside the main housing 1 through the first injection port 8 and the second injection port 9. Note that the final liquid level in the two chambers should not exceed the diameter height of the openings of the first U-shaped tube 6 and the second U-shaped tube 7 that connect to the main housing 1, that is, liquid water should not enter the first U-shaped tube 6 or the second U-shaped tube 7. Then, liquid water is injected from the free ends of the first U-shaped tube 6 and the second U-shaped tube 7. The preparation work before the experiment is completed. When the experimental data measurement begins, the liquid position in the first U-shaped tube 6, the second U-shaped tube 7, the first pressure measuring tube 24, and the second pressure measuring tube 25 is first recorded with chalk or a pen. After the measurement is completed, the first injection port 8 and the second injection port 9 are sealed with the sealing element 10. Then, the first air bladder 4 is pressed by hand. The gas enters the first measuring chamber 2, increasing the pressure inside. The liquid columns in the first U-shaped tube 6 and the first pressure measuring tube 24 rise. Releasing the first air pump 4 allows gas from the second measuring chamber 3 to enter the first air pump 4, reducing the amount of gas in the second measuring chamber 3 and lowering its pressure. This causes the liquid columns in the second U-shaped tube 7 and the second pressure measuring tube 25 to fall. The experimental data is recorded and remarked with a pen, or a ruler can be used to directly record the liquid level using the tabletop as a reference. Then, the second air pump is pressed by hand. Gas from the second inflator bladder 5 enters the second measuring chamber 3, increasing the pressure within it. This causes the liquid columns in the second U-tube 7 and the second pressure measuring tube 25 to rise. Releasing the second inflator bladder 5 allows gas from the first measuring chamber 2 to enter the second inflator bladder 5, reducing the volume of gas in the first measuring chamber 2 and lowering its pressure. This causes the liquid columns in the first U-tube 6 and the first pressure measuring tube 24 to fall. Experimental data is recorded, allowing for two sets of experimental data to be obtained from a single experiment. Multiple data measurements can be performed following the same procedure. This invention improves the water tank pressure regulation system, reducing the steps involved in changing the pressure through waterproofing in existing technologies. In principle, this change does not affect the experimental phenomena or results; it essentially alters the pressure within the water tank. However, the operation of this invention is simpler and cleaner, and data measurement is faster, effectively saving time and costs and improving classroom experiment efficiency. Furthermore, this device can demonstrate the working principle of a U-tube manometer. Both the first inflator bladder 4 and the second inflator bladder 5 are unidirectional inflators.

[0047] In some embodiments of the present invention, the sealing element 10 is a wooden plug.

[0048] In the above embodiments, the density and hardness of the cork should be moderate, the flexibility and elasticity should be good, and the cork should not easily undergo chemical reactions. The sealing element 10 can also be a rubber stopper or a ball valve.

[0049] In some embodiments of the present invention, both the first U-tube 6 and the second U-tube 7 are provided with a first valve 11.

[0050] In the above embodiment, the first valve 11 can be a ball valve. When the air pressure intensity is not being measured, the first valve 11 can be closed, and when measurement is required, it can be opened.

[0051] In some embodiments of the present invention, the main housing 1 is provided with a third pressure measuring tube 12 connected to the first measuring cavity 2 below the first pressure measuring tube 24, and the main housing 1 is provided with a fourth pressure measuring tube 13 connected to the second measuring cavity 3 below the second pressure measuring tube 25.

[0052] In the above embodiments, the setting of the third pressure measuring tube 12 and the fourth pressure measuring tube 13 can further increase the data of a single experiment. At the same time, it can also measure the pressure value of water at different depths while the air pressure changes. The measurement personnel can measure the absolute pressure and relative pressure based on the first pressure measuring tube 24, the second pressure measuring tube 25, the third pressure measuring tube 12, the fourth pressure measuring tube 13, the first U-shaped tube 6 and the second U-shaped tube 7, and verify the hydrostatic equation.

[0053] In some embodiments of the present invention, the main housing 1 is provided with a first support plate 14, a second support plate 15, a third support plate 16 and a fourth support plate 17, the first pressure measuring tube 24 and the third pressure measuring tube 12 are both connected to the first support plate 14, the second pressure measuring tube 25 and the fourth pressure measuring tube 13 are both connected to the second support plate 15, the first U-shaped tube 6 is connected to the third support plate 16, and the second U-shaped tube 7 is connected to the fourth support plate 17.

[0054] In the above embodiments, the first support plate 14, the second support plate 15, the third support plate 16, and the fourth support are all made of plastic plates. This design can effectively support and stabilize the first pressure measuring tube 24, the second pressure measuring tube 25, the third pressure measuring tube 12, the fourth pressure measuring tube 13, the first U-shaped tube 6, and the second U-shaped tube 7, preventing their deformation. The first support plate 14, the second support plate 15, the third support plate 16, and the fourth support, along with the pipes they support, are all connected with hot melt adhesive. Furthermore, the support plates are integrally formed with the main housing 1.

[0055] In some embodiments of the present invention, the first support plate 14 is provided with a first measuring ruler 18, the two sides of the first measuring ruler 18 abutting against the circumferential sides of the first pressure measuring tube 24 and the third pressure measuring tube 12, respectively, and the second support plate 15 is provided with a second measuring ruler 19, the two sides of the second measuring ruler 19 abutting against the circumferential sides of the first pressure measuring tube 24 and the fourth pressure measuring tube 13, respectively.

[0056] In the above embodiments, the arrangement of the first measuring ruler 18 and the second measuring ruler 19 facilitates direct data reading by personnel to a certain extent, and the abutting arrangement makes the readings of the values ​​of the first measuring ruler 18 and the second measuring ruler 19 more accurate, reducing measurement errors. Furthermore, the measuring rulers and the support frame are fixedly connected using hot melt adhesive.

[0057] In some embodiments of the present invention, the third support plate 16 is provided with a third measuring ruler 20, which abuts against the first U-shaped tube 6, and the fourth support plate 17 is provided with a fourth measuring ruler 21, which abuts against the second U-shaped tube 7.

[0058] In the above embodiment, the third measuring ruler 20 allows the experimenter to measure the air pressure intensity variation more accurately, thereby providing more accurate data for the subsequent verification of the hydrostatic equation and ensuring the accuracy of the data. In addition, the measuring ruler and the support frame are fixedly connected by hot melt adhesive.

[0059] In some embodiments of the present invention, the main housing 1 is a transparent housing.

[0060] In the above embodiments, the transparent enclosure allows the experimenter to clearly see the liquid level when injecting liquid water into the first measuring chamber 2 and the second measuring chamber 3, thus avoiding pouring in too much or too little liquid water.

[0061] In some embodiments of the present invention, a protective sleeve 22 is provided at the bottom of the main housing 1, and anti-slip texture 23 is provided on the circumferential side of the protective sleeve 22.

[0062] In the above embodiment, the protective sleeve 22 is a silicone sleeve that is fitted onto the side wall of the main container 1 to protect its bottom and prevent personnel from damaging the main container 1 when handling the main container 1 containing liquid water; the anti-slip texture 23 can prevent the handling personnel from slipping when handling the main container 1, making the handling process more stable.

[0063] In some embodiments of the present invention, the first airbag 4 is provided with a second valve 26, and the second airbag 5 is provided with a third valve 27.

[0064] In the above embodiment, when the experimenter presses the first air bladder 4 by hand, the second valve 26 on the first air bladder 4 opens, and the third valve 27 on the second air bladder 5 closes. This design is to prevent the gas from bursting open the second air bladder 5 due to increased pressure when the air pressure in the first measuring chamber 2 increases, thus preventing air leakage. When the experimenter presses the second air bladder 5 by hand, the third valve 27 on the second air bladder 5 opens, and the second valve 26 on the first air bladder 4 closes. This design is to prevent the gas from bursting open the first air bladder 4 due to increased pressure when the air pressure in the second measuring chamber 3 increases, thus preventing air leakage. This design can, to a certain extent, enhance the gas sealing effect of the first air bladder 4 and the second air bladder 5 when they are not in operation, ensuring the accuracy of the experiment.

[0065] In summary, the present invention provides a variable pressure two-body hydrostatic experimental device, which has at least the following beneficial effects:

[0066] Currently available hydrostatic experimental setups mostly require placement on an experimental platform due to the nature of their operating components, rather than on a lectern. This occupies a significant amount of experimental space and results in unnecessary resource waste. Furthermore, reducing the air pressure in the water tank during the experiment requires opening the bottom drain valve to release water, making the overall experimental operation cumbersome. Moreover, existing hydrostatic experimental setups are single-unit devices, meaning they contain only one water tank. A single operation can only obtain one set of data, requiring multiple experiments to obtain multiple sets of data, which consumes a significant amount of experimental time and results in low experimental efficiency. In this embodiment of the invention, the water valve that creates the pressure drop phenomenon in existing equipment is eliminated. One-way first air bladder 4 and second air bladder 5 are used to change the gas pressure in the first measuring chamber 2 and the second measuring chamber 3 of the main chamber 1. Because the lower water valve is eliminated, this embodiment of the invention can be placed directly on a test bench or desk. The elimination of the support frame design prevents the base from oxidizing due to water corrosion, effectively protecting the cleanliness of the experimental table. The change in the height of the liquid column in the first U-shaped tube 6 and the second U-shaped tube 7, which are connected to the side wall of the main chamber 1, is used for display. This allows experiments to be conducted simultaneously in both the first and second measuring chambers 3 within the main chamber 1, simplifying the operation steps while increasing the data obtained per operation, effectively saving time and cost and improving experimental efficiency. The main chamber 1 has a first inlet 8 and a second inlet 9, which are used not only for the release and entry of water from the tank but also for balancing the air pressure inside and outside the tank during the experiment.

[0067] The first U-shaped tube 6, the second U-shaped tube 7, the first pressure measuring tube 24, and the second pressure measuring tube 25 are all transparent tubes. In the experiment to verify the equation of incompressible hydrostatics (i.e., using the experimental device in this embodiment of the invention), the experimental liquid (represented by liquid water directly below) is first injected into the first measuring chamber 2 and the second measuring chamber 3 inside the main housing 1 through the first injection port 8 and the second injection port 9. Note that the final liquid level in the two chambers should not exceed the diameter height of the openings of the first U-shaped tube 6 and the second U-shaped tube 7 that connect to the main housing 1, that is, liquid water should not enter the first U-shaped tube 6 or the second U-shaped tube 7. Then, liquid water is injected from the free ends of the first U-shaped tube 6 and the second U-shaped tube 7. The preparation work before the experiment is completed. When the experimental data measurement begins, the liquid position in the first U-shaped tube 6, the second U-shaped tube 7, the first pressure measuring tube 24, and the second pressure measuring tube 25 is first recorded with chalk or a pen. After the measurement is completed, the first injection port 8 and the second injection port 9 are sealed with the sealing element 10. Then, the first air bladder 4 is pressed by hand. The gas enters the first measuring chamber 2, increasing the pressure inside. The liquid columns in the first U-shaped tube 6 and the first pressure measuring tube 24 rise. Releasing the first air pump 4 allows gas from the second measuring chamber 3 to enter the first air pump 4, reducing the amount of gas in the second measuring chamber 3 and lowering its pressure. This causes the liquid columns in the second U-shaped tube 7 and the second pressure measuring tube 25 to fall. The experimental data is recorded and remarked with a pen, or a ruler can be used to directly record the liquid level using the tabletop as a reference. Then, the second air pump is pressed by hand. The gas in the second inflatable bladder 5 enters the second measuring chamber 3, increasing the air pressure inside. This causes the liquid columns in the second U-tube 7 and the second pressure measuring tube 25 to rise. Releasing the second inflatable bladder 5 allows gas from the first measuring chamber 2 to enter the second inflatable bladder 5, reducing the amount of gas in the first measuring chamber 2 and lowering its internal air pressure. This causes the liquid columns in the first U-tube 6 and the first pressure measuring tube 24 to fall. Experimental data is recorded. Thus, two sets of experimental data can be obtained from a single experiment, and multiple data measurements can be performed following the same procedure. This invention improves the water tank pressure regulation system, reducing the steps involved in changing air pressure through waterproofing in existing technologies. In principle, this change does not affect the experimental phenomena or results; it essentially alters the air pressure inside the water tank. However, the operation of this invention is simpler and cleaner, and data measurement is faster, effectively saving time and costs and improving classroom experiment efficiency. Furthermore, this device can demonstrate the working principle of a U-tube manometer.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A variable-pressure two-body hydrostatic experimental apparatus, characterized in that, The device includes a main housing, which contains a first measuring chamber and a second measuring chamber. The main housing is equipped with a first air pump for injecting gas from the second measuring chamber into the first measuring chamber, and a second air pump for injecting gas from the first measuring chamber into the second measuring chamber. The main housing is also equipped with a first pressure measuring tube and a first U-shaped tube connected to the first measuring chamber, and a second pressure measuring tube and a second U-shaped tube connected to the second measuring chamber. The main housing has a first injection port and a second injection port connected to the first and second measuring chambers, respectively. Both the first and second injection ports are equipped with sealing elements.

2. The variable pressure two-body hydrostatic experimental device according to claim 1, characterized in that, The sealing element is a wooden plug.

3. The variable pressure two-body hydrostatic experimental device according to claim 1, characterized in that, Both the first U-tube and the second U-tube are equipped with a first valve.

4. The variable pressure two-body hydrostatic experimental device according to claim 1, characterized in that, The main housing is located below the first pressure measuring tube and has a third pressure measuring tube that communicates with the first measuring cavity. The main housing is located below the second pressure measuring tube and has a fourth pressure measuring tube that communicates with the second measuring cavity.

5. The variable pressure two-body hydrostatic experimental device according to claim 4, characterized in that, The main housing is provided with a first support plate, a second support plate, a third support plate and a fourth support plate. The first pressure measuring tube and the third pressure measuring tube are both connected to the first support plate, the second pressure measuring tube and the fourth pressure measuring tube are both connected to the second support plate, the first U-shaped tube is connected to the third support plate, and the second U-shaped tube is connected to the fourth support plate.

6. The variable pressure two-body hydrostatic experimental device according to claim 5, characterized in that, The first support plate is provided with a first measuring ruler, the two sides of which abut against the ring sides of the first pressure measuring tube and the third pressure measuring tube, respectively. The second support plate is provided with a second measuring ruler, the two sides of which abut against the ring sides of the first pressure measuring tube and the fourth pressure measuring tube, respectively.

7. The variable pressure two-body hydrostatic experimental device according to claim 5, characterized in that, The third support plate is provided with a third measuring ruler, which abuts against the first U-shaped tube. The fourth support plate is provided with a fourth measuring ruler, which abuts against the second U-shaped tube.

8. The variable pressure two-body hydrostatic experimental device according to claim 1, characterized in that, The main enclosure is a transparent enclosure.

9. The variable pressure two-body hydrostatic experimental device according to claim 1, characterized in that, The bottom of the main housing is provided with a protective sleeve, and the protective sleeve has anti-slip texture on the ring side.

10. A variable pressure two-body hydrostatic experimental device according to claim 9, characterized in that, The first airbag is equipped with a second valve, and the second airbag is equipped with a third valve.

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