Teaching equipment for demonstrating air occupied space

Abstract

The utility model discloses a teaching aid for demonstrating the space occupied by air, which relates to the technical field of experimental teaching and comprises a placing box, a demonstration part and an air transmission part for exhausting and inflating, the demonstration part is placed in the placing box, and the right side of the placing box is provided with the air transmission part; the demonstration component used for demonstrating air occupation comprises a placing bag, a first demonstration object, a mounting cover, a bottle cover and a connecting pipe. According to the space occupation teaching aid provided by the utility model, the course of exploring the air space occupation gets rid of dependence on water, and the size of the air space occupation can be changed by increasing and reducing the amount of air, so that each student can operate and carry out recording work; students are taught by providing two modes of implementing exploration occupied space through one device, meanwhile, materials of the device are easy to obtain, that is, the students can conduct assembly work by themselves at home, and learning in after-class time is better facilitated.

Description

Technical Field

[0001] This utility model relates to the field of experimental teaching technology, specifically a teaching device for demonstrating air occupying space. Background Technology

[0002] Experiments that demonstrate that air occupies a certain space are an important part of elementary school curriculum.

[0003] For example, the utility model provides an experimental teaching aid for air occupying space, as described in application number CN202323209935.4. This aid includes a bucket, a transparent cup, a valve core, and an air pump. The transparent cup is inverted in the water in the bucket. The valve core passes through the bottom of the transparent cup, allowing the inside and outside of the cup to be closed or connected. The air pump is connected to the valve core, allowing air to be injected into the transparent cup through the valve core. The advantages of this utility model are: utilizing the valve core's ability to both seal and pump air, combined with the air pump, it provides a direct understanding of the relationship between the amount of air inside the inverted cup and the space it occupies; the operation is simple and convenient.

[0004] The above-mentioned air-occupying-space experimental teaching aids still have the following problems when used:

[0005] Existing experimental teaching aids require a large amount of water during actual use, which is not conducive to classroom teaching and also makes it inconvenient for students to conduct experiments on their own. Utility Model Content

[0006] The purpose of this invention is to provide a teaching device that demonstrates how air occupies space, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A teaching device for demonstrating air occupying space includes a placement box, a demonstration component, and an air supply component for evacuating and inflating air. The demonstration component is placed inside the placement box, and the air supply component is located on the right side of the placement box.

[0009] The demonstration component for demonstrating air occupation includes a placement bag, a first demonstration object, a mounting cap, a bottle cap, and a connecting tube. The first demonstration object is placed inside the placement bag. The mounting cap is located on the right side of the placement bag. The bottle cap is threaded onto the right side of the mounting cap. The connecting tube is connected to the right side of the bottle cap. A second demonstration object is placed on the rear side of the placement bag.

[0010] Furthermore, the gas delivery component includes a needle tube, a three-way hose, a one-way valve, a connecting hose, and a piston rod. The gas delivery end of the needle tube is connected to the three-way hose, and one-way valves are connected to both the left and right sides of the three-way hose. A connecting hose is provided on the side of the one-way valve away from the three-way hose, and a piston rod is provided inside the needle tube.

[0011] Furthermore, the placement bag is a transparent plastic bag, and the first demonstration object is a sponge.

[0012] Furthermore, the connecting hose is connected to the connecting tube in a sleeve-type connection.

[0013] Furthermore, the drawstring of the placement bag extends to and covers the mounting cap.

[0014] Furthermore, the second demonstration object is a building block.

[0015] Furthermore, the second demonstration object is set up with three.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The space-occupying teaching equipment provided by this utility model eliminates the reliance on water for the lesson on exploring the space occupied by air. Furthermore, the size of the space occupied by air can be changed by increasing or decreasing the amount of air. This allows each student to operate and record their findings. The device provides two ways to explore the space-occupying function, and the materials used are relatively easy to obtain, meaning students can assemble it at home, making it more suitable for learning during their spare time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a three-dimensional structure of a teaching device that demonstrates the space occupied by air.

[0019] Figure 2 This is a partial side view of a teaching device for demonstrating air-occupying space.

[0020] Figure 3 This is a top view schematic diagram of a teaching device for demonstrating the space occupied by air.

[0021] In the picture:

[0022] 1. Placement box; 2. Box lid; 3. Demonstration component; 301. Placement bag; 302. First demonstration object; 303. Mounting cap; 304. Bottle cap; 305. Connecting tube; 4. Gas delivery component; 401. Syringe; 402. Three-way hose; 403. One-way valve; 404. Connecting hose; 405. Piston rod; 5. Second demonstration object. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] like Figure 1-3 As shown, this utility model provides a teaching device for demonstrating air occupying space, including a placement box 1, a demonstration component 3, and an air supply component 4 for evacuating and inflating air. The demonstration component 3 is placed inside the placement box 1, and the air supply component 4 is located on the right side of the placement box 1. The teaching device for air occupying space provided by this utility model eliminates the dependence on water for the lesson on exploring air occupying space, and the size of the air occupying space can be changed by increasing and decreasing the amount of air. This allows each student to operate and record their work. It provides two ways to explore air occupying space through one device, and the materials for this utility model are also relatively easy to obtain, meaning that students can assemble it themselves at home, which is more conducive to learning during their spare time.

[0025] like Figure 2-3 As shown, the demonstration component 3 for demonstrating air occupation includes a placement bag 301, a first demonstration object 302, a mounting cover 303, a bottle cap 304, and a connecting tube 305. The first demonstration object 302 is placed inside the placement bag 301. The mounting cover 303 is provided on the right side of the placement bag 301. The bottle cap 304 is threadedly installed on the right side of the mounting cover 303. The connecting tube 305 is connected to the right side of the bottle cap 304. The second demonstration object 5 is placed on the rear side of the placement bag 301. Detailed implementation method:

[0027] The placement bag 301 can be used to squeeze the second demonstration object 5 or the first demonstration object 302, while the mounting cover 303 is made by cutting off the upper part of a plastic bottle. The mounting cover 303 and the bottle cap 304 are connected by hot melt adhesive, and air will enter and exit through the connecting tube 305.

[0028] In one embodiment, the gas delivery component 4 includes a needle tube 401, a three-way hose 402, a one-way valve 403, a connecting hose 404, and a piston rod 405. The gas delivery end of the needle tube 401 is connected to the three-way hose 402. One-way valves 403 are connected to both the left and right sides of the three-way hose 402. A connecting hose 404 is provided on the side of the one-way valve 403 away from the three-way hose 402. A piston rod 405 is provided inside the needle tube 401. The piston rod 405 inside the needle tube 401 moves back and forth, causing the placement bag 301 to expand or contract. The direction of air flow inside the three-way hose 402 can be changed by turning the one-way valve 403.

[0029] In one embodiment, the placement bag 301 is a transparent plastic bag, and the first demonstration object 302 is a sponge. When the air in the placement bag 301 is extracted, the sponge will be squeezed to work.

[0030] In one implementation, the connecting hose 404 and the connecting tube 305 are connected in a sleeve-like manner. The connecting hose 404 and the connecting tube 305 can be manually plugged and unplugged. The direction of the connecting hose 404 can be reversed for different demonstration objects.

[0031] In one embodiment, the drawstring opening of the placement bag 301 extends to and covers the mounting cap 303, and the placement bag 301 is sealed by the mounting cap 303 and the bottle cap 304.

[0032] In one implementation, the second demonstration object 5 is a building block, and three of them are provided. The building blocks can be used to shake inside the placement box 1.

[0033] Example 1:

[0034] When demonstrating the air extraction ratio, first place the first demonstration object 302 in the middle of the placement bag 301. At this time, the lid 2 cannot cover the placement box 1. Then, put the installation cap 303 on the opening of the placement bag 301, and use the bottle cap 304 to seal the installation cap 303. Connect the connecting pipe 305, the connecting hose 404 and the piston rod 405. Then, move the piston rod 405 back and forth. That is, the air is gradually extracted through the three-way hose 402 and the one-way valve 403 to the right connecting hose 404. The first demonstration object 302 is slowly squeezed. Students can slowly record the process until the lid 2 can cover the placement box 1.

[0035] Example 2:

[0036] When demonstrating the air inflation ratio, first remove the first demonstration object 302, place the second demonstration object 5 inside the placement box 1, then close the box lid 2, turn the connecting hose 404 of the air supply component 4 in the opposite direction, and then pull the piston rod 405 back and forth. At this time, the placement bag 301 gradually inflates. Each time the piston rod 405 is pulled back and forth, the placement box 1 can be shaken. See if you can hear the sound of the second demonstration object 5, and record the results. Continue until the placement bag 301 is fully inflated. At this time, the record is completed, the conclusion is drawn, and the experiment is completed.

[0037] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A teaching device for demonstrating air occupying space, comprising a placement box (1), a demonstration component (3), and an air supply component (4) for evacuating and inflating air, characterized in that, The demonstration component (3) is placed inside the placement box (1), and an air supply component (4) is provided on the right side of the placement box (1); The demonstration component (3) for demonstrating air occupation includes a placement bag (301), a first demonstration object (302), a mounting cover (303), a bottle cap (304), and a connecting tube (305). The first demonstration object (302) is placed inside the placement bag (301). The mounting cover (303) is provided on the right side of the placement bag (301). The bottle cap (304) is threaded onto the right side of the mounting cover (303). The connecting tube (305) is connected to the right side of the bottle cap (304). A second demonstration object (5) is placed on the rear side of the placement bag (301).

2. The teaching equipment for demonstrating air occupying space according to claim 1, characterized in that, The gas delivery component (4) includes a needle tube (401), a three-way hose (402), a one-way valve (403), a connecting hose (404), and a piston rod (405). The gas delivery end of the needle tube (401) is connected to the three-way hose (402). One-way valves (403) are connected to both the left and right sides of the three-way hose (402). A connecting hose (404) is provided on the side of the one-way valve (403) away from the three-way hose (402). A piston rod (405) is provided inside the needle tube (401).

3. The teaching equipment for demonstrating air occupying space according to claim 1, characterized in that, The placement bag (301) is a transparent plastic bag, and the first demonstration object (302) is a sponge.

4. The teaching equipment for demonstrating air occupying space according to claim 2, characterized in that, The connecting hose (404) is connected to the connecting pipe (305) in a sleeve-type connection.

5. A teaching device for demonstrating air occupying space according to claim 4, characterized in that, The drawstring of the placement bag (301) extends to the mounting cap (303) and covers it.

6. The teaching equipment for demonstrating air occupying space according to claim 1, characterized in that, The second demonstration object (5) is a building block.

7. A teaching device for demonstrating air occupying space according to claim 1, characterized in that, The second demonstration object (5) has three parts.

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