CN216145322U - Demonstration device for verifying carbon dioxide generated by human breath in teaching - Google Patents
Demonstration device for verifying carbon dioxide generated by human breath in teaching Download PDFInfo
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- CN216145322U CN216145322U CN202121671023.7U CN202121671023U CN216145322U CN 216145322 U CN216145322 U CN 216145322U CN 202121671023 U CN202121671023 U CN 202121671023U CN 216145322 U CN216145322 U CN 216145322U
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- carbon dioxide
- plastic
- teaching
- plastics
- bottle
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 35
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 35
- 239000004033 plastic Substances 0.000 claims abstract description 98
- 229920003023 plastic Polymers 0.000 claims abstract description 98
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 42
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 description 18
- 238000007664 blowing Methods 0.000 description 4
- 210000002345 respiratory system Anatomy 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 239000010797 grey water Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating Or Analysing Biological Materials (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model discloses a demonstrator for verifying carbon dioxide generated by human respiration in teaching, which relates to the field of experimental teaching and comprises two groups of plastic square bottles, wherein the tops of the plastic square bottles are provided with screw plastic bottle caps, the tops of the screw plastic bottle caps are connected with flow dividing pipes through plastic nuts, and one ends of the flow dividing pipes are provided with two groups of one-way valves. The utility model breathes out and breathes in the transparent cylinder body through the breathing gas component, verifies the reaction of air and the clear lime water, and the reaction of human breath and the clear lime water and compares the reactions for verifying the generation of carbon dioxide in human breath.
Description
Technical Field
The utility model relates to the field of experimental teaching, in particular to a demonstrator for verifying carbon dioxide generated by human breath in teaching.
Background
An exploration experiment of the high and low carbon dioxide content in the exhaled air and the inhaled air of a human body is an important demonstration experiment in 'chemistry' of nine grades in an obligate education textbook and is also one of experiments in which students firstly contact chemistry in the beginning of learning; the experiment of carbon dioxide generation by human breath proves that the experiment is an important experiment in the seven-grade biological of the obligatory education textbook, the teaching materials are different, but the principles of the experiment are completely the same.
In the teaching of the chemistry experiments in junior middle schools, the experiment for comparing the carbon dioxide content in the exhaled air and the inhaled air of a human body is usually to prepare two gas collecting bottles full of gas, one is air, the other is exhaled air collected by a drainage method, then clear lime water with the same number of drops is respectively dripped in the exhaled air and oscillated, so that the lime water in the gas collecting bottles storing the air is basically unchanged, the lime water in the exhaled air in the gas collecting bottles storing the exhaled air is obviously turbid, the carbon dioxide content in the exhaled air is higher than the carbon dioxide content in the inhaled air, but a certain time is usually consumed in the actual operation, the operation is carried out twice when one bottle of exhaled air is collected by the drainage method, the clear lime water with the same number of drops is slowly dripped in the gas collecting bottles, the whole experiment takes about 4 minutes, and the experimental steps are shown in fig. 1.
In the biological teaching in junior high school, a teacher demonstration experiment is prepared, but students often participate in the operation, as shown in fig. 2, a spring clip is arranged at a position A and a position B in fig. 2, and the operation must be strictly carried out according to the following steps: the spring clamp at the position B is closed, the spring clamp at the position A is opened, a breath is inhaled, air enters a human body respiratory system after passing through the lime water in the air inlet I, the spring clamp at the position A is closed, the spring clamp at the position B is opened, the breath is exhaled, the air generated by the human body respiratory system enters the air inlet II, but the breath and the breath cannot achieve ideal effects at one time, the previous steps are repeated for several times in actual operation, the lime water in the air inlet II becomes turbid, the lime water in the air inlet I does not become turbid basically, therefore, the fact that the carbon dioxide is generated by human body respiration is proved, and the content of the carbon dioxide in the exhaled air is higher than the content of the carbon dioxide in the inhaled air is also explained. When students participate in operation, operation steps are often easily confused, as a result, the spring clamp at the position B is opened before air suction, the spring clamp at the position A is closed, the students can cause safety accidents in a clear lime water suction inlet with a certain corrosion effect, and the occurrence of experimental accidents is caused by certain defects of the experimental design.
The existing experimental device has long experimental time during experiment, cannot quickly prove that the content of carbon dioxide in exhaled air of a human body is higher than that of carbon dioxide in inhaled air, and cannot scientifically and safely prove that the experimental device of carbon dioxide is generated under the action of human respiration, so that defects often exist, and the measuring result has deviation.
SUMMERY OF THE UTILITY MODEL
Based on the above, the utility model aims to provide a demonstrator for verifying carbon dioxide generated by human breath in teaching, so as to solve the technical problems that the existing experimental device has long experimental time during experiment, cannot quickly prove that the content of carbon dioxide in exhaled air of a human body is higher than that of carbon dioxide in inhaled air, and cannot scientifically and safely prove that carbon dioxide is generated by human breath, so that some defects often exist, and the measurement result has deviation.
In order to achieve the purpose, the utility model provides the following technical scheme: verify human breathing demonstration ware that produces carbon dioxide in teaching, including two sets of plastics square bottles, the top of plastics square bottle is provided with screw socket plastics bottle lid, and the top of screw socket plastics bottle lid is connected with the shunt tubes through the plastic nut, two sets of check valves are installed to the one end of shunt tubes, and is a set of the pipe is installed to the below of check valve, wear the board joint is connected to the top of plastic nut, and is a set of wear the outer wall cover that the board connects is equipped with rubber tube, and rubber tube's one end installs the blow gun, the inside of plastics square bottle is equipped with lime wash, and is two sets of install two sets of plastics gas between the plastics square bottle and detain.
By adopting the technical scheme, the reaction of air and the clarified lime water and the reaction of human breath and the clarified lime water are verified and compared by breathing and inhaling the air into the transparent cylinder through the breathing air assembly, so that the carbon dioxide is generated by the human breath, the device is scientific in design and simple in operation, the content of the carbon dioxide in the inhaled air and the exhaled air of the human body can be compared by simply breathing and exhaling for several times, the contrast phenomenon is obvious, the device can be produced in batches, and is applied to the teaching of junior high school chemistry and biological experiments, more than thirty groups are generally used in a middle school, a certain market is provided, and the device has social and economic benefits; safety, can make things convenient for the student to carry out student's experiment operation, stopped teachers and students and inhaled the possibility of lime wash when the maloperation.
The utility model is further provided with a sealing ring arranged at the contact position of the outer wall of the plastic air buckle and the inner wall of the plastic square bottle, and the sealing ring is arranged at the joint of the screw-mouth plastic bottle cap and the plastic square bottle.
Through adopting above-mentioned technical scheme, be convenient for increase the leakproofness of connecting between two sets of plastics square bottles.
The utility model is further arranged that one end of the guide pipe is positioned in the lime water, and the liquid level of the lime water is lower than the plastic gas buckle.
By adopting the technical scheme, the exhaled gas can be conveniently detected to be fully reacted with the lime water, and the detection and observation are convenient.
The utility model is further provided that two groups of the one-way valves are symmetrically arranged by the vertical central line of the shunt pipe, one group of the one-way valves is connected with the shunt pipe in the positive direction, and the other group of the one-way valves is connected with the shunt pipe in the negative direction.
Through adopting above-mentioned technical scheme, two sets of check valves are different to be set up, can ensure can not inhale lime wash when breathing in, and inside gas can not enter into plastics side bottle through another set of check valve during expiration, the gas of exhalation can only enter into lime wash through the pipe inside.
In summary, the utility model mainly has the following beneficial effects:
according to the utility model, through the arrangement of the shunt pipe, the one-way valve, the plastic air buckle and the guide pipe, the breathing air assembly breathes out and breathes in the transparent cylinder body, the reaction of air and clarified lime water and the reaction of human breath and clarified lime water are verified and compared, and the carbon dioxide is generated by human breath; safety, can make things convenient for the student to carry out student's experiment operation, stopped teachers and students and inhaled the possibility of lime wash when the maloperation.
Drawings
FIG. 1 is a chemical experiment operating table according to the present invention;
FIG. 2 is a diagram of the operation of the biological experiment of the present invention;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic view of the air-breathing structure of the present invention;
fig. 5 is a schematic view of the exhalation structure of the present invention.
In the figure: 1. a plastic square bottle; 2. a screw-top plastic bottle cap; 3. a shunt tube; 4. a one-way valve; 5. lime water; 6. a rubber tube; 7. a blowing nozzle; 8. a plate penetrating joint; 9. a plastic nut; 10. plastic air buckles; 11. a conduit.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes an embodiment of the present invention based on its overall structure.
A demonstrator for verifying carbon dioxide generation by human respiration in teaching is shown in figures 3-5 and comprises two sets of plastic square bottles 1, wherein the top of each plastic square bottle 1 is provided with a screw plastic bottle cap 2, the top of each screw plastic bottle cap 2 is connected with a shunt tube 3 through a plastic nut 9, one end of each shunt tube 3 is provided with two sets of one-way valves 4, a guide tube 11 is arranged below each set of one-way valves 4, a plate penetrating joint 8 is connected above each plastic nut 9, the outer wall of each set of plate penetrating joint 8 is sleeved with a rubber tube 6, one end of each rubber tube 6 is provided with a blowing nozzle 7, lime water 5 is arranged inside each plastic square bottle 1, the two plastic square bottles 1 are respectively provided with 2 small holes at the same position of a joint part, the two plastic square bottles 1 are connected and fixed through a special tool by using a plastic air buckle 10, any one screw plastic bottle cap 2 is opened, and new clarified lime water 5 with about 1/3 is injected into each plastic square bottle 1, the plastic square bottle 1 is inclined, lime water 5 enters another plastic square bottle 1 through a plastic air buckle 10 and is repeatedly adjusted, so that the lime water 5 in the two plastic square bottles 1 is equal, two groups of plastic air buckles 10 are arranged between the two groups of plastic square bottles 1, air is sucked for 10 seconds through a blowing nozzle 7, air enters the left plastic square bottle 1 from a long guide pipe 11 at the left end, bubbles emerge from the lime water 5 in the left plastic square bottle 1, airflow enters the right plastic square bottle 1 through the plastic air buckles 10, enters a human body respiratory system through a one-way valve 4 inside a short pipe 3 in the right plastic square bottle 1, the air is exhaled for 10 seconds, visible exhaled air enters the stone ash water 4 in the plastic square bottle 1 through the long guide pipe 11 from the one-way valve 4 inside the shunt pipe 3, bubbles emerge from the lime water 5 in the right plastic square bottle 1, and the airflow is directly discharged from the shunt pipe 3 at the upper end of the left bottle through the plastic air buckle 10, after repeated inspiration and expiration (the strength is basically consistent with the time), for a while, the lime water 5 in the left plastic square bottle 1 is basically unchanged, while the lime water 5 in the right plastic square bottle 1 is obviously turbid, so that the content of carbon dioxide in the expired air is higher than that in the air, and the carbon dioxide gas generated by the respiration of a human body is also indicated.
Referring to fig. 3, a sealing ring is arranged at a contact position between the outer wall of the plastic air buckle 10 and the inner wall of the plastic square bottle 1, and a sealing ring is arranged at a joint of the screw-top plastic bottle cap 2 and the plastic square bottle 1, so that the sealing property of the connection between the two groups of plastic square bottles 1 is increased.
Referring to fig. 3, one end of the conduit 11 is located in the lime water 5, and the liquid level of the lime water 5 is lower than the plastic gas button 10, so that exhaled gas can sufficiently react with the lime water 5 for detection and observation.
Referring to fig. 5, two sets of check valves 4 are symmetrically arranged along the vertical centerline of the shunt tube 3, and one set of check valve 4 is connected with the shunt tube 3 in the forward direction, one set of check valve 4 is connected with the shunt tube 3 in the reverse direction, and 10 seconds of expiration are performed, so that the expired air enters the lime water 4 in the plastic square bottle 1 through the check valve 4 inside the shunt tube 3 through the long guide tube 11, bubbles emerge from the lime water 5 in the right plastic square bottle 1, the air flow is directly discharged from the shunt tube 3 short tube at the upper end in the left bottle through the plastic air lock 10, and the two sets of check valves 4 are arranged differently, so that the lime water 5 cannot be inhaled during inspiration, the air cannot enter the plastic square bottle 1 through the other set of check valve during expiration, and the expired air can enter the lime water 5 through the guide tube 11.
The working principle of the utility model is as follows: wherein the components in the two groups of plastic square bottles 1 are the same and are bilaterally symmetrical, 2 small holes are respectively drilled at the same position of the joint part of the two plastic square bottles 1, the two plastic square bottles 1 are connected and fixed by a plastic air buckle 10 through a special tool, any one screw plastic bottle cap 2 is opened, about 1/3 fresh clarified lime water 5 is injected into the plastic square bottles 1, the plastic square bottles 1 are inclined, the lime water 5 enters the other plastic square bottle 1 through the plastic air buckle 10 and is repeatedly adjusted, the lime water 5 in the two plastic square bottles 1 is equivalent, the principle and the airflow direction of the one-way valve 4 (the long pipe air inlet short pipe gives out air) are realized, the air is sucked for 10 seconds through the blowing nozzle 7, the air enters the left plastic square bottle 1 from the left end long pipe 11, bubbles emerge from the lime water 5 in the left plastic square bottle 1, the airflow enters the right plastic square bottle 1 through the plastic air buckle 10, and enters the human body respiratory system through the one-way valve 4 in the inner shunt pipe 3 of the right plastic square bottle 1, expiration is carried out for 10 seconds, it is seen that expired air enters the plastic square bottle 1 of the stone grey water 4 through the long guide pipe 11 by the check valve 4 inside the shunt tube 3, bubbles emerge from the lime water 5 in the right plastic square bottle 1, airflow is directly discharged from the shunt tube 3 short tube at the upper end in the left bottle through the plastic air buckle 10, repeated inspiration and expiration (the force is basically consistent with the time), for a while, it is seen that the lime water 5 in the left plastic square bottle 1 is basically unchanged, and the lime water 5 in the right plastic square bottle 1 obviously becomes turbid, so that the content of carbon dioxide in the expired air is higher than that in the air, and the carbon dioxide gas generated by human respiration is also explained.
Although embodiments of the present invention have been shown and described, the present embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and those skilled in the art can make modifications, substitutions, variations, etc. of the embodiments as required without departing from the principle and spirit of the present invention, but within the scope of the claims of the present invention.
Claims (6)
1. Verify human breathing demonstration ware that produces carbon dioxide in teaching, including two sets of plastics square bottles (1), its characterized in that: the top of plastics square bottle (1) is provided with screw socket plastics bottle lid (2), and the top of screw socket plastics bottle lid (2) is connected with shunt tubes (3) through plastics nut (9), two sets of check valve (4) are installed to the one end of shunt tubes (3), and is a set of pipe (11) are installed to the below of check valve (4), wear plate joint (8) are connected to the top of plastics nut (9), and are a set of wear plate joint (8)'s outer wall cover is equipped with rubber tube (6), and rubber tube's (6) one end installs blow gun (7), lime wash (5) are equipped with to the inside of plastics square bottle (1), and are two sets of install two sets of plastics gas between plastics square bottle (1) and detain (10).
2. The demonstrator used in teaching for verifying carbon dioxide production by human breath as claimed in claim 1, wherein: and a sealing ring is arranged at the contact position of the outer wall of the plastic air buckle (10) and the inner wall of the plastic square bottle (1).
3. The demonstrator used in teaching for verifying carbon dioxide production by human breath as claimed in claim 1, wherein: one end of the guide pipe (11) is positioned in the lime water (5), and the liquid level of the lime water (5) is lower than the plastic air button (10).
4. The demonstrator used in teaching for verifying carbon dioxide production by human breath as claimed in claim 1, wherein: the two groups of check valves (4) are symmetrically arranged on the vertical middle line of the shunt pipe (3).
5. The demonstrator used in teaching for verifying carbon dioxide production by human breath as claimed in claim 1, wherein: one group of the one-way valves (4) are connected with the shunt tubes (3) in the forward direction, and the other group of the one-way valves (4) are connected with the shunt tubes (3) in the reverse direction.
6. The demonstrator used in teaching for verifying carbon dioxide production by human breath as claimed in claim 1, wherein: and a sealing ring is arranged at the joint of the screw-mouth plastic bottle cap (2) and the plastic square bottle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121671023.7U CN216145322U (en) | 2021-07-16 | 2021-07-16 | Demonstration device for verifying carbon dioxide generated by human breath in teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121671023.7U CN216145322U (en) | 2021-07-16 | 2021-07-16 | Demonstration device for verifying carbon dioxide generated by human breath in teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216145322U true CN216145322U (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121671023.7U Expired - Fee Related CN216145322U (en) | 2021-07-16 | 2021-07-16 | Demonstration device for verifying carbon dioxide generated by human breath in teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216145322U (en) |
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2021
- 2021-07-16 CN CN202121671023.7U patent/CN216145322U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220329 |
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| CF01 | Termination of patent right due to non-payment of annual fee |