Physical experiment teaching aid for changing internal energy of object by doing work

Abstract

The utility model belongs to the technical field of experiment teaching aids, particularly relates to a physical experiment teaching aid capable of changing internal energy of an object by doing work, and aims to solve the problems that in the prior art, a thermometer is adopted to detect the temperature in a bottle, but the sensitivity of a conventional thermometer is not enough during detection, and the object doing work outwards is difficult to intuitively display, so that the working efficiency is poor. In order to solve the problems in the prior art that the experiment teaching aid is not beneficial to teaching, the utility model provides the following scheme: the experiment teaching aid comprises a kettle body, one side of the kettle body is provided with a handle, the top opening position of the kettle body is in threaded connection with a sealing cover, the experiment teaching aid also comprises an exhaust mechanism, and the exhaust mechanism is arranged on one side of the sealing cover. According to the teapot, the air temperature in the teapot body can be accurately detected through the arranged temperature sensor, and when gas is released, the exhaust process can be visually observed through the arranged whistle and blades, so that students can understand conveniently during experiment teaching.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental teaching aids, in particular to a physical experimental teaching aid for changing the internal energy of an object by doing work. Background Art

[0002] The first is that the external world does work on the object; the second is that the object does work on the external world. Students can understand the former in real life, but the latter is less common in teaching. The main reason is that there are no experimental equipment and it is difficult to use visual experiments to solve abstract theories.

[0003] According to the announcement number: CN213635008U, an experimental device for changing the internal energy of an object by doing work is disclosed, including a see-through bottle and a balloon built in the see-through bottle, characterized in that the see-through bottle is provided with a bottle cap, the bottle cap is used as a support body, and the bottle cap is provided with a valve core, a thermometer and a deflation pipe passing through the bottle cap, and the deflation pipe is provided with a deflation valve; the balloon forms a sealing structure with the inner side of the bottle cap, and the valve core, the thermometer and the deflation pipe extend into the balloon. The change of the internal energy by doing work has a specific temperature digital display, making the vague experimental phenomenon clear, specific and accurate, and the experimental result is changed from qualitative to quantitative; the experimental operation is convenient, and two experimental phenomena are completed in one operation; the internal energy change phenomenon is displayed by the balloon, with high visibility and obvious effect; the materials of the whole device are easy to obtain, simple to make and low cost.

[0004] The above technical solution uses a thermometer to detect the temperature inside the bottle, but the conventional thermometer is not sensitive enough when performing detection. Moreover, when an object does work outward, it is difficult to display it intuitively, which is not conducive to teaching. Therefore, we propose a physical experiment teaching aid that changes the internal energy of an object by doing work to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the existing technical solution uses a thermometer to detect the temperature in a bottle, but the conventional thermometer has insufficient sensitivity during detection, and furthermore, it is difficult to display intuitively when an object does work outward, which is not conducive to teaching. A physical experiment teaching aid for changing the internal energy of an object by doing work is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A physical experiment teaching aid for changing the internal energy of an object by doing work, comprising a kettle body, a handle being arranged on one side of the kettle body, a sealing cover being threadedly connected to the top opening of the kettle body, and the experimental teaching aid further comprising:

[0008] An exhaust mechanism, which is installed on one side of the sealing cover and is connected to the sealing cover;

[0009] A plugging mechanism, the plugging mechanism is installed in the exhaust mechanism;

[0010] The piston mechanism penetrates the cover and is connected to the top inner wall of the cover, the bottom of the piston mechanism extends into the opening of the kettle body, and the piston mechanism is in close contact with the inner wall of the opening of the kettle body;

[0011] The detection mechanism is installed on one side of the kettle body, one side of the detection mechanism extends into the kettle body, and the detection mechanism is used to detect the temperature inside the kettle body.

[0012] In one possible design, the exhaust mechanism includes an outlet pipe fixedly mounted on the inner wall of one side of the cover, a sealing mechanism is mounted in the outlet pipe, one end of the outlet pipe extends to the outside of the cover and is fixedly mounted with a whistle, a support plate is fixedly mounted on the bottom of one side of the cover, and blades are rotatably connected to the support plate.

[0013] In a possible design, the blocking mechanism includes a mounting ring fixedly installed in the air outlet pipe, a mounting plate fixedly installed in the mounting ring, a cross bar slidingly connected through the mounting plate, a spherical plate fixedly installed at one end of the cross bar, the spherical plate blocks the mounting ring, and a compression spring located in the air outlet pipe is sleeved on the cross bar, and both ends of the compression spring are respectively fixedly connected to the other end of the cross bar and one side of the mounting plate.

[0014] In one possible design, the piston mechanism includes a push rod that passes through the cover and is sealingly and slidingly connected to the top inner wall of the cover. The bottom end of the push rod extends into the opening of the kettle body and is fixedly mounted with a piston plate. The piston plate is sealingly and slidingly connected to the inner wall of the opening of the kettle body, and a plurality of one-way valves are fixedly mounted at equal intervals through the piston plate.

[0015] In one possible design, a pull rod is fixedly installed on one side of the spherical plate, an inclined plate is fixedly installed on one end of the pull rod, a sliding sleeve on the push rod is provided with an inner conical ring located in the cover, a plurality of plug rods are fixedly installed at equal intervals on the bottom of the inner conical ring, and a support spring is provided on the push rod and is located below the inner conical ring, and the top and bottom ends of the support spring are fixedly connected to the bottom of the inner conical ring and the top of the piston plate respectively.

[0016] In a possible design, the detection mechanism includes a display screen fixedly mounted on one side of the kettle body, the display screen is electrically connected to a temperature sensor, and one end of the temperature sensor extends into the kettle body.

[0017] In the present application, the kettle body is the main part of this experimental teaching aid, with an opening at the top and threadedly connected to the sealing cover. The sealing cover plays the role of closing the kettle body and keeping the internal gas from leaking. The exhaust mechanism is installed on one side of the sealing cover and is connected to the sealing cover. It includes an air outlet pipe, one end of which extends to the outside of the sealing cover and is fixedly installed with a whistle. When the gas inside the kettle body is discharged outward through the air outlet pipe, the gas will blow the whistle to make a sound, making the exhaust process more intuitive. In addition, a blade is also provided under the air outlet pipe. After the gas passes through the whistle, the blade will blow to rotate, further enhancing the visualization effect of the experiment. The blocking mechanism is installed in the air outlet pipe, mainly playing the role of controlling the flow of gas. It includes a spherical plate, which is connected to the inner wall of the air outlet pipe through a cross bar and a compression spring. When the negative pressure in the sealing cover increases, the spherical plate will move under the action of the negative pressure, so that the external air pressure is pumped into the sealing cover through the air outlet pipe. When the negative pressure disappears, the compression spring The elastic force of the spring will reset the spherical plate and block the air outlet pipe. The piston mechanism includes a push rod and a piston plate. The push rod passes through the sealing cover and is sealed and slidably connected to the top inner wall of the sealing cover. The bottom end of the push rod extends into the opening of the kettle body and is fixedly connected to the piston plate. The piston plate is sealed and slidably connected to the inner wall of the opening of the kettle body. A plurality of one-way valves are fixedly installed on the piston plate at equal intervals. By pushing the push rod, the piston plate can be driven to move up and down in the kettle body, thereby changing the air pressure in the kettle body. When the piston plate moves downward, negative pressure is formed above the kettle body, so that the blocking mechanism opens and external gas is sucked in; when the piston plate moves upward, the air pressure in the kettle body increases, and the gas is pressed into the kettle body through the one-way valve. The detection mechanism includes a display screen and a temperature sensor. The temperature sensor is installed on one side of the kettle body, and one end of the temperature sensor extends into the kettle body for detecting the temperature inside the kettle body. The display screen is electrically connected to the temperature sensor, and the detected temperature data can be displayed for observation and analysis.

[0018] Beneficial effects:

[0019] In the utility model, the physical experiment teaching aid for doing work to change the internal energy of an object can, through the exhaust mechanism, when the gas inside the pot body is discharged to the outside through the exhaust pipe, the gas can be transported to the whistle, and the whistle will make a sound. Then, after passing through the whistle, the gas can be blown to the blades, so that the blades rotate, so that when exhausting, the gas can be intuitively felt to be discharged;

[0020] In the utility model, the physical experiment teaching aid for changing the internal energy of an object by doing work can use the elastic force of the compression spring to elastically limit the crossbar through the blocking mechanism, so that when the spherical plate is not subjected to negative pressure, it can tightly seal the mounting ring, and when the piston mechanism moves, the negative pressure in the sealing cover increases, and the spherical plate will move under the action of the negative pressure, so that the external air pressure can be pumped into the sealing cover through the air outlet pipe;

[0021] In the utility model, the physical experiment teaching aid for changing the internal energy of an object by doing work, through the piston mechanism, can drive the piston plate to move downward when the push rod is pushed downward, at this time, the upper part of the piston plate will present a negative pressure state, which can drive the ball plate to move, and suck the external gas into the sealing cover, when the piston plate moves upward, the ball plate will be in close contact with the inner wall of the mounting ring, at this time, the valve core of the one-way valve will be moved under the action of the gas pressure, so that the one-way valve can be in an open state, so that the gas can be transported into the kettle body, so that the gas pressure in the kettle body is increased;

[0022] In the utility model, the physical experiment teaching aid for changing the internal energy of an object by doing work can add gas to the kettle body or discharge the gas in the kettle body through the detection mechanism, can sensitively detect the temperature in the kettle body through the set temperature sensor, and can transmit the detected data to the display screen for display, so as to accurately control the temperature change in the kettle body;

[0023] The utility model can accurately detect the temperature in the kettle body through the arranged temperature sensor when injecting gas into or discharging gas into the kettle body, and can intuitively observe the exhaust process through the arranged whistle and blades when releasing gas, so as to facilitate students' understanding during experimental teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional schematic diagram of the overall structure of a physical experiment teaching aid for changing the internal energy of an object by doing work proposed by the utility model;

[0025] Figure 2 A three-dimensional schematic diagram of the cutaway structure of a pot body and a cover of a physical experiment teaching aid for changing the internal energy of an object by doing work proposed by the utility model;

[0026] Figure 3 The utility model discloses a three-dimensional schematic diagram of the cross-sectional structure of a cover and an air outlet pipe of a physical experiment teaching aid for changing the internal energy of an object by doing work.

[0027] In the figure: 1. kettle body; 2. sealing cover; 3. push rod; 4. exhaust pipe; 5. whistle; 6. display screen; 7. temperature sensor; 8. support plate; 9. blades; 10. mounting ring; 11. cross bar; 12. spherical plate; 13. pull rod; 14. inclined plate; 15. compression spring; 16. inner conical ring; 17. piston plate; 18. one-way valve; 19. plug rod; 20. support spring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Example 1

[0030] Reference Figure 1-3 A physical experiment teaching aid comprises a pot body 1, a sealing cover 2, an exhaust mechanism, a sealing mechanism, a piston mechanism and a detection mechanism.

[0031] The kettle body 1 is the main part of the teaching aid, and a handle is provided on one side thereof for easy carrying and operation. A sealing cover 2 is threadedly connected to the top opening of the kettle body 1, and the sealing cover 2 can tightly seal the opening of the kettle body 1 to prevent gas leakage.

[0032] The exhaust mechanism is installed on one side of the cover 2 and is connected to the cover 2. The exhaust mechanism includes an exhaust pipe 4 fixedly installed on the inner wall of one side of the cover 2, one end of the exhaust pipe 4 extends to the outside of the cover 2 and is fixedly installed with a whistle 5. When the gas in the kettle body 1 is discharged outward through the exhaust pipe 4, the gas will blow the whistle 5 to make a sound, so that the exhaust of the gas can be intuitively felt. In addition, a support plate 8 is fixedly installed on the bottom of one side of the cover 2, and a blade 9 is rotatably connected to the support plate 8. The exhausted gas will blow toward the blade 9 after passing through the whistle 5, causing the blade 9 to rotate, further enhancing the visualization effect of the experiment.

[0033] The blocking mechanism is installed in the exhaust mechanism, specifically, in the air outlet pipe 4. The blocking mechanism includes a mounting ring 10 fixedly installed in the air outlet pipe 4, and a mounting plate is fixedly installed in the mounting ring 10. A cross bar 11 is slidably connected through the mounting plate, and a spherical plate 12 is fixedly installed at one end of the cross bar 11, and the spherical plate 12 is used to block the mounting ring 10. A compression spring 15 located in the air outlet pipe 4 is sleeved on the cross bar 11, and the two ends of the compression spring 15 are respectively fixedly connected to the other end of the cross bar 11 and one side of the mounting plate. When not affected by negative pressure, the elastic force of the compression spring 15 can keep the cross bar 11 in place, so that the spherical plate 12 tightly blocks the mounting ring 10. When the piston mechanism moves, the negative pressure in the cover 2 increases, and the spherical plate 12 will move under the action of the negative pressure, so that the external air pressure is pumped into the cover 2 through the air outlet pipe 4.

[0034] The piston mechanism penetrates the cover 2 and is sealed and slidably connected to the top inner wall of the cover 2. The piston mechanism includes a push rod 3, the bottom end of which extends into the opening of the kettle body 1 and is fixedly mounted with a piston plate 17. The piston plate 17 is sealed and slidably connected to the inner wall of the opening of the kettle body 1 and can move up and down in the kettle body 1. A plurality of one-way valves 18 are fixedly mounted on the piston plate 17 at equal intervals. When the push rod 3 is pushed to move downward, the piston plate 17 moves downward accordingly. At this time, a negative pressure state is formed above the piston plate 17, thereby driving the spherical plate 12 to move and open the air outlet pipe 4, so that the external gas is sucked into the cover 2. When the push rod 3 moves upward, the piston plate 17 moves upward. At this time, the valve core of the one-way valve 18 opens under the action of air pressure, allowing gas to enter the kettle body 1, thereby increasing the air pressure in the kettle body 1.

[0035] In order to control the discharge of gas, the present invention also designs a special mechanism. Specifically, a pull rod 13 is fixedly installed on one side of the spherical plate 12, and an inclined plate 14 is fixedly installed on one end of the pull rod 13. An inner conical ring 16 located in the cover 2 is slidably sleeved on the push rod 3, and a plurality of plug rods 19 are fixedly installed at equal intervals at the bottom of the inner conical ring 16. A support spring 20 located below the inner conical ring 16 is sleeved on the push rod 3, and the top and bottom ends of the support spring 20 are fixedly connected to the bottom of the inner conical ring 16 and the top of the piston plate 17 respectively. When the push rod 3 is pulled upward, the inclined plate 14 contacts the inner wall of the inner conical ring 16, and drives the pull rod 13 to move into the cover 2 under the action of the inclined surface, thereby separating the spherical plate 12 from the mounting ring 10. At this time, under the blocking action of the pull rod 13, the inner conical ring 16 cannot move upward. As the push rod 3 continues to move upward, the insertion rods 19 on the multiple one-way valves 18 will be inserted into the corresponding one-way valves 18, separating the valve core from the valve housing, thereby putting the one-way valve 18 in a flow state, and the gas in the kettle body 1 can flow through the multiple one-way valves 18 to the air outlet pipe 4 so that the gas can be discharged.

[0036] The present application can be used in the field of experimental teaching aid technology, and can also be used in other fields applicable to the present application.

[0037] Example 2

[0038] refer to Figure 2 , improved on the basis of embodiment 1: a physical experiment teaching aid for doing work to change the internal energy of an object, which is applied to the technical field of experimental teaching aids, the detection mechanism includes a display screen 6 fixedly mounted on one side of the kettle body 1, and a temperature sensor 7 is electrically connected to the display screen 6, one end of the temperature sensor 7 extends into the kettle body 1, when gas is added to the kettle body 1 or the gas in the kettle body 1 is discharged, the temperature in the kettle body 1 can be sensitively detected by the set temperature sensor 7, and the detected data can be transmitted to the display screen 6 for display, so that the temperature change in the kettle body 1 can be accurately controlled.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of the display screen 6 and the temperature sensor 7 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

Claims

1. A physical experiment teaching aid for changing the internal energy of an object by doing work, comprising a kettle body (1), a handle being arranged on one side of the kettle body (1), a cover (2) being threadedly connected to the top opening of the kettle body (1), and characterized in that: The experimental teaching aids also include: An exhaust mechanism, the exhaust mechanism is mounted on one side of the sealing cover (2), and the exhaust mechanism is in communication with the sealing cover (2); A plugging mechanism, the plugging mechanism is installed in the exhaust mechanism; A piston mechanism, the piston mechanism passes through the cover (2) and is connected to the top inner wall of the cover (2), the bottom of the piston mechanism extends into the opening of the kettle body (1), and the piston mechanism is in close contact with the inner wall of the opening of the kettle body (1); A detection mechanism is installed on one side of the kettle body (1), one side of the detection mechanism extends into the kettle body (1), and the detection mechanism is used to detect the temperature inside the kettle body (1).

2. A physical experiment teaching aid for changing the internal energy of an object by doing work according to claim 1, characterized in that: The exhaust mechanism comprises an air outlet pipe (4) fixedly mounted on the inner wall of one side of the sealing cover (2), a blocking mechanism mounted in the air outlet pipe (4), one end of the air outlet pipe (4) extending to the outside of the sealing cover (2) and fixedly mounted with a whistle (5), a support plate (8) fixedly mounted on the bottom of one side of the sealing cover (2), and a blade (9) rotatably connected to the support plate (8).

3. A physical experiment teaching aid for changing the internal energy of an object by doing work according to claim 1, characterized in that: The blocking mechanism comprises a mounting ring (10) fixedly mounted in the air outlet pipe (4), a mounting plate fixedly mounted in the mounting ring (10), a cross bar (11) slidably connected to the mounting plate, a spherical plate (12) fixedly mounted on one end of the cross bar (11), the spherical plate (12) blocks the mounting ring (10), a compression spring (15) located in the air outlet pipe (4) is sleeved on the cross bar (11), and two ends of the compression spring (15) are respectively fixedly connected to the other end of the cross bar (11) and one side of the mounting plate.

4. A physical experiment teaching aid for changing the internal energy of an object by doing work according to claim 3, characterized in that: The piston mechanism comprises a push rod (3) which passes through the sealing cover (2) and is sealingly and slidably connected to the top inner wall of the sealing cover (2); the bottom end of the push rod (3) extends into the opening of the kettle body (1) and is fixedly mounted with a piston plate (17); the piston plate (17) is sealingly and slidably connected to the inner wall of the opening of the kettle body (1); and a plurality of one-way valves (18) are fixedly mounted on the piston plate (17) at equal intervals.

5. A physical experiment teaching aid for changing the internal energy of an object by doing work according to claim 4, characterized in that: A pull rod (13) is fixedly installed on one side of the spherical plate (12), and an inclined plate (14) is fixedly installed on one end of the pull rod (13). An inner conical ring (16) located in the sealing cover (2) is slidably sleeved on the push rod (3), and a plurality of plug rods (19) are fixedly installed at equal intervals on the bottom of the inner conical ring (16). A support spring (20) located below the inner conical ring (16) is sleeved on the push rod (3), and the top and bottom ends of the support spring (20) are fixedly connected to the bottom of the inner conical ring (16) and the top of the piston plate (17), respectively.

6. A physical experiment teaching aid for changing the internal energy of an object by doing work according to claim 1, characterized in that: The detection mechanism comprises a display screen (6) fixedly mounted on one side of the kettle body (1); a temperature sensor (7) is electrically connected to the display screen (6); and one end of the temperature sensor (7) extends into the kettle body (1).

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