Experimental equipment for teaching
Through the innovative design of components such as the experimental pot, laser pen and balloon, the problems of short-term phenomena, frequent equipment replacement and low success rate in compression ignition experiments have been solved, achieving a safer and more efficient experimental experience.
Patent Information
- Application Number
- CN202422470376.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The existing compression ignition experimental device has the problems of short experimental phenomenon duration, frequent equipment replacement, low success rate, difficult operation and safety hazards.
Using components such as an experimental pot, a laser pen, a temperature sensor and a balloon, the experimental phenomena are observed through the compressed air and temperature changes in the experimental pot, and the changes in the optical path are observed using the laser pen and the balloon, which simplifies the operation and improves safety.
It prolongs the duration of experimental phenomena, improves the success rate of experiments, simplifies the operation process, enhances safety, and reduces costs.
Smart Images
Figure CN223486614U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of experimental equipment, specifically a physics experimental device for teaching. Background Technology
[0002] To deepen students' understanding of physics concepts and provide a more intuitive experience to help them learn physics better, moving beyond mere theoretical understanding, it is necessary to conduct relevant experiments based on practical needs. One such experiment is the compression ignition experiment. Existing compression ignition experiments typically involve a rigid cylindrical container capable of withstanding pressure and housing other components. A movable piston is placed inside the container, generating thrust. A handle connected to the piston is located at its upper end for pushing it. During the experiment, several pieces of nitrocellulose are placed at the bottom of the container. The piston is pushed rapidly within the container using the handle and connecting rod, compressing the air and nitrocellulose inside. As the piston moves, the pressure and temperature inside the container rise rapidly. When the pressure and temperature reach a certain level, the flammable components in the nitrocellulose are ignited, thus completing the experiment. However, this structure has the following drawbacks:
[0003] 1) The experimental phenomenon lasts for a short period of time and is not easily observed by students in the back row;
[0004] 2) The equipment needs to be replaced each time an experiment is completed and before another experiment can be conducted.
[0005] 3) Through multiple experiments using the above apparatus, it was found that the success rate of the experiment was no higher than 20% when 10 operators performed the experiment together. The main reasons for such a low success rate are as follows:
[0006] First, because each experiment requires filling the barrel with digestive cotton, and it is difficult to control the amount of digestive cotton when filling it, too much digestive cotton or not fluffy enough will lead to the failure of the experiment.
[0007] Secondly, after the experiment is completed, the digestive cotton needs to be replaced again. However, the inner wall of the barrel will be covered with some lubricant such as petroleum jelly due to the piston. When the digestive cotton is put in, this lubricant will stick to the inner wall of the barrel, which will also lead to the failure of the experiment.
[0008] Third, because the experiment requires a large thrust generated by the piston, it requires male teachers with greater strength to operate. Female teachers with less strength not only find it very difficult to perform the experiment, but also have a very low success rate. This results in a significant limitation on the practicality of the structure. In addition, because the downward pressure is large and the cylinder itself cannot be fixed, it is very easy to get injured during the experiment, posing a safety hazard. Utility Model Content
[0009] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background art, this utility model proposes an experimental device for teaching.
[0010] The technical solution adopted by this utility model to solve its technical problem is: a teaching experimental device, including an experimental container for temporarily storing gas and a laser pointer for illuminating the experimental container. The experimental container is provided with an exhaust button and an exhaust head. A balloon is provided at the exhaust end of the exhaust head. A temperature sensor probe is provided inside the experimental container. The temperature sensor probe is connected to a display unit through a wire harness.
[0011] Furthermore, the experimental vessel includes a vessel body, a pressure rod, a piston, an air inlet pipe, and an exhaust head;
[0012] The upper end of the kettle body is provided with a kettle lid, and the lower end of the kettle body is threadedly connected to a kettle base. The kettle body, kettle lid and kettle base are used together to store gas.
[0013] The pressure rod: By continuously pressing down the pressure rod, air is forced into the inside of the pot, increasing the pressure inside the pot;
[0014] The piston is installed at one end of the pressure rod and moves up and down inside the pot as the pressure rod is pressed down, serving to seal and compress the air. When the pressure rod is pressed down, the piston moves downward, compressing the air inside the pot and thus increasing the pressure inside the pot.
[0015] The air inlet pipe connects the outside and inside of the kettle body and is used to allow outside air to enter the kettle body when the pressure rod is pressed down to supplement the compressed air. The air inlet pipe is equipped with a one-way valve to ensure that air can only enter the kettle body and will not flow out of the kettle body.
[0016] The exhaust head is used to expel gas from the kettle.
[0017] Furthermore, the lid is provided with a handle, and the vent button is located on the handle. The vent button is made of plastic and is used to control the gas to be ejected from the vent.
[0018] Furthermore, the experimental vessel is a spray bottle.
[0019] Furthermore, the diameter of the exhaust head is larger than the air inlet of the balloon, and the balloon is fitted onto the exhaust head.
[0020] Furthermore, the display unit includes a base, on which a rotating disk is rotatably mounted, and on which a display is mounted.
[0021] The advantages of this utility model are:
[0022] 1) It effectively extended the duration, and students in the back row could also clearly observe the experimental phenomena;
[0023] 2) No need to change equipment or digestive cotton after each experiment, saving time and effort;
[0024] 3) It replaces the original experimental device, which not only effectively improves the success rate, but also improves safety; at the same time, it has the advantages of simple structure, easy operation, low manufacturing cost and easy portability.
[0025] This innovative and improved teaching aid solves the shortcomings of experimental equipment in textbooks, allowing every student to observe experimental phenomena and making education more equitable. The device is derived from everyday life (a household spray bottle can be used for the experiment) and can be reused repeatedly; it is inexpensive and economical. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0028] Figure 2 This is a schematic diagram of the structure of the kettle body in this utility model, in which a temperature sensor probe is installed. Detailed Implementation
[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0030] Specific implementation examples are given below.
[0031] Please see Figure 1-2 As shown, a teaching experimental device includes an experimental container 1 for temporarily storing gas and a laser pointer 2 for illuminating the experimental container 1. The experimental container 1 is equipped with an exhaust button 3 and an exhaust head 5. An air balloon 6 is provided at the exhaust end of the exhaust head 5. A temperature sensor probe 7 is provided inside the experimental container 1. The temperature sensor probe 7 is connected to a display unit 9 through a wiring harness 8. The experimental container 1 is made of transparent material.
[0032] The experimental pot 1 includes a pot body 10, a pressure rod 11, a piston, an air inlet pipe, and an exhaust head 5;
[0033] The upper end of the kettle body 10 is provided with a kettle lid 12, and the lower end of the kettle body 10 is threadedly connected to a kettle base 1511. The kettle body 10, the kettle lid 12 and the kettle base 1511 are used together to store gas.
[0034] The pressure rod 11: By continuously pressing down the pressure rod 11, air is forced into the pot body 10, increasing the pressure inside the pot body 10;
[0035] The piston is installed at one end of the pressure rod 11 and moves up and down inside the pot body 10 as the pressure rod 11 is pressed down, which plays the role of sealing and compressing air. When the pressure rod 11 is pressed down, the piston moves downward and compresses the air inside the pot body 10, thereby increasing the pressure inside the pot body 10.
[0036] The air inlet pipe connects the outside and inside of the kettle body 10 and is used to allow outside air to enter the kettle body when the pressure rod 11 is pressed down to supplement the compressed air. The air inlet pipe is equipped with a one-way valve to ensure that air can only enter the kettle body 10 and will not flow out of the kettle body 10.
[0037] The exhaust head 5 is used to discharge the gas inside the kettle body 10.
[0038] The lid 12 is provided with a handle 13, and the exhaust button 3 is provided on the handle 13. The exhaust button 3 is made of plastic and is used to control the gas to be ejected from the exhaust head 5.
[0039] In addition to the above structure, the experimental pot 1 can also be a household spray bottle. The spray bottle is an existing technology structure and will not be described in detail here. Alternatively, any pot body that can achieve this function in the existing technology can be used, and no specific restrictions are imposed here.
[0040] The diameter of the exhaust head 5 is larger than the air inlet of the balloon 6, and the balloon 6 is fitted onto the exhaust head 5. The balloon 6 can be directly fitted onto the exhaust head 5, or it can be detached and fixed to the exhaust head 5 by means of a rope or other fixing structure.
[0041] The display unit 9 includes a base 15, on which a rotating disk 16 is rotatably mounted, and a display 17 is mounted on the rotating disk 16.
[0042] The working principle involves connecting the experimental container 1 and the temperature sensor together (the wiring harness 8 can be detached for easy carrying and storage). A balloon 6 is placed on the exhaust head 5 (depending on the size of the balloon and the tightness of the fit, it can be tied to the exhaust head 5 with a rope). The process of pumping air into the experimental container 1 is the process of the gas performing work. As the pumping continues, the temperature inside the experimental container 1 gradually increases. The temperature change is observed through the display 17. Then, the exhaust head 5 is vented to release the gas into the balloon, causing it to expand. Observing the balloon's expansion indicates that the gas is performing work, and the temperature change on the display 17 is also observed.
[0043] Alternatively, the experiment vessel 1 can be illuminated by laser pointer 2. Specifically, a small amount of alcohol is sprayed into the experiment vessel 1 first, and then the experiment vessel 1 is illuminated by laser pointer 2. The light path (the beam emitted by the laser pointer) can be observed to prove that the alcohol vaporizes due to the increase in temperature and liquefies due to the decrease in temperature.
[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A teaching experimental device, characterized in that: The apparatus includes an experimental container (1) for temporarily storing gas and a laser pointer (2) for illuminating the experimental container (1). The experimental container (1) is equipped with an exhaust button (3) and an exhaust head (5). An air balloon (6) is provided at the exhaust end of the exhaust head (5). A temperature sensor probe (7) is provided inside the experimental container (1). The temperature sensor probe (7) is connected to a display unit (9) via a wire harness (8).
2. The experimental equipment for teaching purposes according to claim 1, characterized in that: The experimental pot (1) includes a pot body (10), a pressure rod (11), a piston, an air inlet pipe, and an exhaust head (5); The upper end of the pot body (10) is provided with a pot lid (12), and the lower end of the pot body (10) is threadedly connected with a pot base (1511). The pot body (10), the pot lid (12) and the pot base (1511) are used together to store gas. The pressure rod (11): By continuously pressing down the pressure rod (11), air is forced into the pot body (10), increasing the pressure inside the pot body (10); The piston is installed at one end of the pressure rod (11). As the pressure rod (11) is pressed down, it moves up and down inside the pot body (10) to seal and compress the air. When the pressure rod (11) is pressed down, the piston moves downward and compresses the air inside the pot body (10), thereby increasing the pressure inside the pot body (10). The air inlet pipe connects the outside and inside of the kettle body (10) and is used to allow outside air to enter the kettle body when the pressure rod (11) is pressed down to supplement the compressed air. The air inlet pipe is equipped with a one-way valve to ensure that air can only enter the kettle body (10) and will not flow out of the kettle body (10). The exhaust head (5) is used to discharge the gas inside the kettle body (10).
3. The experimental equipment for teaching according to claim 2, characterized in that: The lid (12) is provided with a handle (13), and the exhaust button (3) is provided on the handle (13). The exhaust button (3) is made of plastic and is used to control the gas to be ejected from the exhaust head (5).
4. The experimental equipment for teaching purposes according to claim 1, characterized in that: The experimental container (1) is a spray bottle.
5. The experimental equipment for teaching purposes according to claim 1, characterized in that: The diameter of the exhaust head (5) is larger than the air inlet of the balloon (6), and the balloon (6) is fitted onto the exhaust head (5).
6. The experimental equipment for teaching purposes according to claim 1, characterized in that: The display unit (9) includes a base (15), on which a rotating disk (16) is rotatably mounted, and on which a display (17) is mounted.