Auxiliary modeling device for liquid pressure experiment

Abstract

The utility model relates to an auxiliary modeling device for a liquid pressure experiment, which comprises a hollow shell, the top of the shell is provided with a water filling nozzle communicated with the inside, the oblique section of the shell forms an opening surface at the bottom of the shell, an elastic film is arranged on the opening surface, and the included angle between the opening surface and the central axis of the shell is 30-60 degrees. The utility model provides a teaching aid which is convenient for students to learn and observe related experiment effects.

Description

Technical Field

[0001] The utility model relates to a teaching tool, in particular to an auxiliary modeling device for liquid pressure experiments. Background Art

[0002] The physics subject in junior high school aims to cultivate students' scientific thinking and give them a qualitative understanding of the physics common sense around them. It also aims to apply physics knowledge to daily life. The main purpose of learning physics knowledge is to use physics knowledge to explain various phenomena in life and to use physics knowledge to analyze the causes of various problems, so as to find solutions and measures to solve related problems.

[0003] At present, when helping students learn about liquid pressure, teachers need to guide students to understand what determines the size of liquid pressure, and then help students derive the calculation formula for liquid pressure. At the same time, in the face of students' extended thinking during the learning process, it is more conducive to the mastery of knowledge through students' hands-on experiments. Therefore, providing students with a teaching aid that is easy to learn and observe the effects of related experiments is a problem that needs to be solved. At present, the experimental teaching aids related to liquid pressure have unobvious experimental effects and may only be convenient for teachers to demonstrate operations, which is not conducive to students' hands-on experiments. This is not conducive to students' understanding of knowledge and extended thinking. Utility Model Content

[0004] The utility model provides a liquid pressure experiment auxiliary modeling device, which provides students with an experimental teaching tool that is convenient for learning knowledge related to liquid pressure and observing relevant experimental effects. The experimental effect is obvious, which is conducive to students' hands-on experimental use and helps students understand the knowledge and extend their thinking.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a liquid pressure experiment auxiliary modeling device, comprising a hollow shell, a water inlet connected to the interior is opened on the top of the shell, the oblique cross-section of the shell forms an open surface at the bottom of the shell, an elastic membrane is arranged on the opening surface, and the angle between the opening surface and the central axis of the shell is 30 to 60 degrees.

[0006] As a further improvement, the shell is a tubular structure.

[0007] As a further improvement, the shell is an "S"-shaped tubular structure.

[0008] As a further improvement, the angle between the opening surface and the central axis of the shell is 45 degrees.

[0009] As a further improvement, a water level scale line is provided on the surface of the shell.

[0010] As a further improvement, the shell has an outer diameter of 40 to 60 mm, an inner diameter of 30 to 50 mm, and a length of 500 to 600 mm.

[0011] As a further improvement, the shell has an outer diameter of 50 mm, an inner diameter of 40 mm, and a length of 550 mm.

[0012] As a further improvement, the elastic membrane is detachably arranged at the bottom opening of the shell.

[0013] As a further improvement, the shell is a transparent acrylic tube.

[0014] The above technical solution of the present invention has the following beneficial effects: the angle between the opening surface and the central axis of the shell is 30 to 60 degrees, so that during the experiment, students can simultaneously observe the deformation of the elastic membrane in the vertical state and the horizontal state when the bottom of the shell is immersed in the water tank at the same liquid level depth. Even if the elastic membrane is in the vertical state in the water tank, the student's hand is still outside the water tank, avoiding soaking the hand and making the experimental effect more obvious, which is conducive to the student's observation. The liquid pressure experiment auxiliary modeling device of the present application uses the image of "elastic membrane" to intuitively explain the method of selecting liquid slices, and uses the colored liquid column in the shell 1 to visualize the abstract modeling method; using the balance method, it helps students analyze and solve problems, stimulates students' thinking, and improves their interest in learning. It further analyzes the relationship between the liquid pressure on both sides of the "elastic membrane" when the "elastic membrane" is a plane or a vertical surface. It is simple and clear, which is convenient for students to learn and understand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0016] Figure 2 This is a side structural diagram of one embodiment of the present utility model;

[0017] Figure 3 This is a side structural diagram of one embodiment of the present utility model;

[0018] Figure 4 This is a side structural diagram of one embodiment of the present invention after experimental water is injected into the shell;

[0019] Figure 5 This is a side structural diagram of one embodiment of the present invention after experimental water is injected into the shell;

[0020] Figure 6 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 7 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 8 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 9 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 10 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 11 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure numerals: 1. Shell, 2. Water filling port, 3. Opening surface, 4. Elastic membrane, 5. Water level scale line, 6. Water tank, 7. Experimental water. DETAILED DESCRIPTION

[0027] The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and essence of the present invention, modifications or replacements made to the methods, steps or conditions of the present invention are within the scope of the present invention.

[0028] The following describes the implementation of the present invention in detail with reference to the accompanying drawings and examples.

[0029] See also Figures 1 to 11As shown, the utility model discloses a liquid pressure experiment auxiliary modeling device, comprising a hollow shell 1, a water injection port 2 connected to the interior is opened on the top of the shell 1, an oblique cross-section of the shell 1 forms an open surface 3 at the bottom of the shell 1, an elastic membrane 4 is arranged on the open surface 3, and the angle between the open surface 3 and the central axis of the shell 1 is 30 to 60 degrees. The liquid pressure experiment auxiliary modeling device of the present application is a teaching tool for students to establish an idealized model to derive the calculation formula of liquid pressure, wherein the hollow shell 1 can be a hollow rectangular structure or a cylindrical structure or an anisotropic tubular structure, and experimental water 7 can be injected into the shell 1 from the water injection port 2 position at the top. Since the oblique cross-section of the shell 1 forms the open surface 3 at the bottom of the shell 1, that is, the bottom surface of the shell 1 is inclined, for the convenience of understanding the scheme, an example is given. When the shell 1 is a straight cylindrical structure and is placed vertically on the table, the surface of the water injection port 2 is parallel to the table, and the shell 1 and the desktop, that is, the angle between the elastic membrane 4 and the desktop is 30 to 60 degrees, preferably 45 degrees, or, when the shell 1 is a curved anisotropic structure, the straight cylindrical area of ​​the shell 1 connected to the bottom opening of the shell 1 is perpendicular to the desktop, the angle between the opening surface 3 at the bottom of the shell 1 and the desktop, that is, the angle between the elastic membrane 4 and the desktop is 30 to 60 degrees, preferably 45 degrees. According to the specific bending position of the top of the shell 1, the water inlet 2 surface and the desktop can be parallel or the water inlet 2 surface and the surface of the bottom opening of the shell 1 are parallel. When in use, students prepare for the experiment: fill the water tank 6 with a suitable water level, prepare colored experimental water 7 to make the experimental effect more obvious, insert the position with the elastic membrane 4 at the bottom of the hollow shell 1 into the water tank 6 at a depth of about 15 cm below the water surface, place the elastic membrane 4 horizontally or vertically and observe the deformation of the elastic membrane 4. The teacher asks: How deep should red experimental water 7 be added to the hollow shell 1? The experimental water 7 can be red alcohol, copper sulfate solution, or something else. The students continue the experiment, injecting the experimental water 7 into the shell 1 through the water inlet 2 and recording the depth of the alcohol in the shell 1 and the deformation of the elastic membrane 4 in the water. The teacher can then ask: When the surface of the elastic membrane 4 is level with the opening at the bottom of the shell 1, the upper and lower pressures are equal. Which pressure is easier to calculate? How is it calculated? How much? The teacher can also add about 15 cm of copper sulfate solution to the shell 1 and observe the deformation of the membrane. The teacher asks: How deep should the membrane be inserted vertically into the water for it to return to a horizontal position? The students perform the experiment, recording the depth of the copper sulfate solution in the shell 1 and the depth of the elastic membrane 4 in the water. The teacher follows up on the above question. The pressure of the liquid in the shell 1 is easier to calculate. The liquid pressure on the elastic membrane 4 is equal to the gravity acting on the liquid above it.In the practice class, students can use experimental data to calculate the density of the copper sulfate solution. They can also first fill shell 1 with approximately 15 cm of red lab water 7 and observe the deformation of the elastic membrane 4 at the bottom opening of shell 1. Ask students: What is the pressure generated by the water in shell 1? How can they determine its depth? Students can insert shell 1 into water tank 6 so that the water levels inside and outside are level. When elastic membrane 4 is placed vertically, observe the deformation of the membrane. Continue pondering the above questions. Guide students to analyze: when the elastic membrane 4 is horizontal with the edge of the bottom opening of the shell 1, that is, the elastic membrane 4 does not protrude outside the shell 1, nor does it sink into the inside of the shell 1, the pressure of the experimental water 7 in the shell 1 is equal to the pressure of the water in the water tank 6 outside the shell 1. The liquid pressure depends on the depth (the vertical distance from the water surface to the research point) and has nothing to do with the shape of the container. The liquid pressure experiment auxiliary modeling device of this application, since the angle between the opening surface 3 and the central axis of the shell 1 is 30 to 60 degrees, allows students to immerse the bottom of the shell 1 in the water tank 6 at the same liquid level depth during the experiment and observe the deformation of the elastic membrane 4 in the vertical and horizontal states. Even if the elastic membrane 4 is in a vertical state in the water tank 6, the student's hand is still outside the water tank 6. Avoiding getting the hand wet also makes the experimental effect more obvious, which is beneficial to students' observation. The liquid pressure experiment auxiliary modeling device of the present application uses the "elastic membrane 4" to visually illustrate the method of selecting the liquid sheet, and uses the colored liquid column in the shell 1 to visualize the abstract modeling method; it uses the balance method to help students analyze and solve problems, stimulate students' thinking, and improve their interest in learning. It further analyzes the relationship between the liquid pressure on both sides of the "elastic membrane 4" when the "elastic membrane 4" is a plane or a vertical surface, which is simple and clear.

[0030] Please refer to Figure 1 、 2 , 4, and Figure 6 、 7 As shown in Figure 10, specifically, the outer shell is a tubular structure, which is convenient for students to hold for experiments and observe the experimental effects. It can be a straight tubular structure or a wavy tubular structure. During the teacher's teaching process, the straight tubular structure or the wavy tubular structure can be used alone to help students explore the deformation state of the elastic membrane 4 when it is in a horizontal state or a vertical state in the water tank 6. It can also be used to explore the pressure changes on each surface under the same depth conditions of the water tank 6. It can also be used to combine the straight tubular structure and the wavy tubular structure to complete the control experiment, and further guide students to analyze: when using two types of tubular structures, the elastic membrane 4 is flat and is at the same depth in the water tank 6. The pressure of the experimental water 7 in the tubular structure is equal to the pressure of the experimental water 7 outside the tubular structure. The liquid pressure depends on the depth and has nothing to do with the shape of the container. Finally, based on the experimental summary, students learn that the size of the liquid pressure in the water tank 6 is determined by the liquid density and the liquid depth, and has nothing to do with the shape of the shell 1 or the amount of liquid.

[0031] Please refer to Figure 3 、 5 as well as Figure 8 、 9 As shown in Figure 11, specifically, the outer shell is an "S"-shaped tubular structure, which further facilitates students to hold it for experiments and observe the experimental results.

[0032] Please refer to Figures 1 to 11 As shown, specifically, the angle between the opening surface 3 and the central axis of the shell 1 is 45 degrees. In this way, whether the bottom of the shell 1 is vertically immersed in the water tank 6 or tilted to immerse the elastic membrane 4 in different directions, the experimental effect is clearly displayed, which is convenient for students to hold and observe.

[0033] Please refer to Figures 1 to 11 As shown, specifically, a water level scale line 5 is provided on the surface of the shell 1 to facilitate measuring the amount of experimental water 7 injected into the shell 1.

[0034] Please refer to Figures 1 to 11 As shown, specifically, the outer diameter of the shell 1 is 40-60 mm, the inner diameter is 30-50 mm, and the length is 500-600 mm. The preferred outer diameter of the shell 1 is 50 mm, the inner diameter is 40 mm, and the length is 550 mm. Since the liquid pressure experiment auxiliary modeling device of the present application is a teaching tool, if the outer diameter of the shell 1 is too large, the students will not be able to hold it, which will affect the experiment. If the outer diameter is too small, it will affect the size of the inner diameter, thereby affecting the amount of experimental water 7 injected into the shell 1, resulting in an unclear experimental effect. Therefore, the outer diameter and inner diameter of the shell 1 have a greater impact on the experimental effect.

[0035] Please refer to Figures 1 to 11 As shown, specifically, the shell 1 has an outer diameter of 50 mm, an inner diameter of 40 mm, and a length of 550 mm, which further makes the experimental effect more obvious and is convenient for students to hold.

[0036] Please refer to Figures 1 to 11 As shown, specifically, the elastic membrane 4 is detachably arranged at the bottom opening of the shell 1 for easy replacement.

[0037] Please refer to Figures 1 to 11 As shown, specifically, the shell 1 is a transparent acrylic tube, which has a more stable structure and is convenient for observing the deformation of the elastic membrane 4.

[0038] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A liquid pressure experiment auxiliary modeling device, characterized by: The invention comprises a hollow shell (1), wherein a water inlet (2) communicating with the interior is provided at the top of the shell (1), an oblique cross section of the shell (1) forms an opening surface (3) at the bottom of the shell (1), an elastic membrane (4) is provided on the opening surface (3), and an angle between the opening surface (3) and the central axis of the shell (1) is 30 to 60 degrees.

2. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The shell is a tubular structure.

3. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The shell is an "S"-shaped tubular structure.

4. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The angle between the opening surface (3) and the central axis of the shell (1) is 45 degrees.

5. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The surface of the housing (1) is provided with a water level scale line (5).

6. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The shell (1) has an outer diameter of 40 to 60 mm, an inner diameter of 30 to 50 mm, and a length of 500 to 600 mm.

7. The liquid pressure experiment auxiliary modeling device according to claim 6, characterized in that: The shell (1) has an outer diameter of 50 mm, an inner diameter of 40 mm, and a length of 550 mm.

8. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The elastic membrane (4) is detachably arranged at the bottom opening of the housing (1).

9. The liquid pressure experiment auxiliary modeling device according to claim 1, characterized in that: The shell (1) is a transparent acrylic tube.

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