Simple device for measuring vital capacity

Abstract

The utility model discloses a simple device for measuring vital capacity, which relates to the technical field of scientific teaching experiment devices and comprises a barrel body and an air storage inner container arranged in the barrel body. A water level pipe is arranged on the barrel body, an air inlet hose and an exhaust valve are arranged at the top end of the air storage inner container, and a drainage hole is formed in the lower end of the air storage inner container. The vital capacity measuring device is simple in operation and more visual in observation, measurement can be achieved by adding water to a fixed scale, blowing air and observing water level reading, and students can conveniently and independently complete vital capacity measurement. The check valve is installed on the upper portion of the air storage inner container, the problem that reading needs to be conducted immediately after air blowing, otherwise errors are caused by data change is solved, the check valve enables the water level pipe to have a more stable liquid level, students can read the number better and more clearly, and a more accurate experiment result is obtained. The efficiency is high, and the blowing nozzle can be replaced for repeated use after measurement; the whole device is integrally designed, is simple to manufacture, and facilitates teaching popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of scientific teaching experimental devices, in particular to a simple device for measuring vital capacity. Background Art

[0002] The experiment of measuring lung capacity is in the first volume of the fourth grade elementary school science textbook. The specific experimental steps include:

[0003] (1) Unfold the measuring bag.

[0004] (2) Take a deep breath and then exhale the gas through the ventilation tube into the measuring bag.

[0005] (3) After all the air in the lungs has been exhaled, tighten the ventilation tube to prevent air from escaping.

[0006] (4) Read the maximum value (in milliliters) on the inflated measuring bag. This is the measured vital capacity.

[0007] When actually teaching the experimental method in the textbook, it is found that the connection between the ventilation tube and the plastic bag in the second step cannot be sealed, and it needs to be adjusted several times when blowing air; when tightening the ventilation tube in the third step, it is easy to leak during the actual operation; the experimental effect is not ideal.

[0008] Chinese patent CN214705162U discloses a scientific teaching aid for measuring vital capacity in a cycle, which has accurate and convenient readings and can measure vital capacity in a cycle. However, the teaching aid needs to be refilled with water before each measurement, which is inconvenient to operate and is not conducive to teaching promotion. Utility Model Content

[0009] 1. Technical problems to be solved by the utility model

[0010] In view of the problems of poor experimental effect and inconvenient operation in existing teaching materials, the utility model provides a simple device for measuring vital capacity, which is easy to operate, can be completed independently by students, has accurate and convenient readings, has good experimental effect, and can perform repeated measurements.

[0011] 2. Technical solution

[0012] In order to solve the above problems, the technical solution provided by the utility model is:

[0013] A simple device for measuring vital capacity comprises a barrel body and an air storage liner, wherein the air storage liner is arranged in the barrel body; a water level pipe communicating with the barrel body is arranged on the barrel body, an air intake hose and an exhaust valve are arranged at the top of the air storage liner, and a drainage hole is arranged at the lower end of the air storage liner.

[0014] Furthermore, it also includes a check valve, and one end of the air intake hose is connected to the air storage liner through the check valve.

[0015] Furthermore, the other end of the air intake hose is connected to a nozzle.

[0016] Furthermore, the water level tube is provided with a scale.

[0017] Furthermore, a chart area is provided on the barrel body, and the chart area includes a reading and vital capacity comparison table, an operation step diagram, and a simple troubleshooting table.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0020] (1) The device for measuring vital capacity is simple to operate and more intuitive to observe. The measurement can be done by adding water to a fixed scale, blowing, and observing the water level reading, which is convenient for students to complete independently.

[0021] (2) The utility model device is equipped with a check valve on the upper part of the gas storage tank to avoid the problem that the reading needs to be read immediately after blowing, otherwise there will be errors. The check valve makes the water level tube have a more stable liquid level, so that students can read better and more clearly and obtain more accurate experimental results.

[0022] (3) The utility model device has high efficiency in measuring vital capacity. After the measurement is completed, the mouthpiece can be replaced and reused. In addition to teaching demonstration, it is also convenient for students to measure in class, so that students can have a deeper experience of the experiment and the experimental effect is good.

[0023] (4) The entire device of the utility model is of integrated design, which is simple to manufacture and convenient for teaching and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a comprehensive demonstration teaching aid for optical experiments proposed in an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of a gas storage liner of a comprehensive demonstration teaching aid for optical experiments proposed in an embodiment of the utility model;

[0026] Description of reference numerals:

[0027] 1. Barrel body; 11. Water level tube; 12. Chart area; 13. Scale; 2. Air storage tank; 21. Air intake hose; 22. Exhaust valve; 23. Drain hole; 24. Check valve; 25. Mouthpiece; DETAILED DESCRIPTION

[0028] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. The terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection claimed by the present invention.

[0030] Example 1

[0031] Combined with Figure 1-2 A simple device for measuring vital capacity, characterized in that it comprises a barrel body 1 and an air storage liner 2, wherein the air storage liner 2 is arranged in the barrel body 1; the barrel body 1 is provided with a water level pipe 11 communicating with the barrel body 1, the top of the air storage liner 2 is provided with an air intake hose 21 and an exhaust valve 22, and the lower end of the air storage liner 2 is provided with a drainage hole 23. The water level pipe 11 is provided with a scale 13.

[0032] The utility model device adds water into the barrel body, and the water enters the lower end of the air storage liner through the drainage hole at the lower end of the air storage liner, and also enters the water level tube communicated with the barrel body, and the water is added to a specific position, such as the 0 scale; the exhaust valve at the upper end of the air storage liner is closed to make the inside of the air storage liner in a sealed state, and air is blown into the air storage liner through the air intake hose, the pressure in the air storage liner increases, and the water in the air storage liner will be squeezed into the barrel body, and further squeezed into the water level tube, so that the water level in the water level tube rises to a certain scale; the corresponding vital capacity can be known by checking the reading and the vital capacity comparison table, and the measurement is completed, and the measurement is simple; after the measurement is completed, the exhaust valve is opened, the pressure inside and outside the air storage liner is the same, the water level returns to the original position, that is, the 0 scale, and the measurement can be restarted.

[0033] The readings and the vital capacity comparison table may be different due to different barrel sizes, and can be calculated using the volume formula, which is convenient for direct reading during measurement. For example, in an experiment of measuring vital capacity using the device of this embodiment, the comparison table is as follows:

[0034]

[0035] The vital capacity data detected by the teaching material and teaching aid vital capacity measurement bag has low accuracy and can only roughly measure the vital capacity data. In addition, it is easy to leak during the measurement operation, resulting in more inaccurate measurement. The utility model measures the vital capacity data by the displacement method. The minimum scale reading converts the vital capacity to about 27ml, and the maximum range is about 3600ml, which meets the vital capacity measurement range of primary school stage.

[0036] Example 2

[0037] Combined with Figure 1-2 A simple device for measuring vital capacity, characterized in that it comprises a barrel body 1 and an air storage liner 2, wherein the air storage liner 2 is arranged in the barrel body 1; the barrel body 1 is provided with a water level pipe 11 communicating with the barrel body 1, the top of the air storage liner 2 is provided with an air intake hose 21 and an exhaust valve 22, and the lower end of the air storage liner 2 is provided with a drain hole 23. It also comprises a check valve 24, and one end of the air intake hose 21 is connected to the air storage liner 2 through the check valve 24. The other end of the air intake hose 21 is connected with a mouthpiece 25. The water level pipe 11 is provided with a scale 13. The barrel body 1 is provided with a marking area 12.

[0038] A check valve is installed on the upper part of the gas storage tank, and the air intake hose is connected to the gas storage tank through the check valve to avoid gas backflow and achieve unidirectional gas flow, so that the water level tube maintains a stable liquid level, avoiding the problem of reading immediately after blowing, otherwise there will be errors, which can better allow students to read clearly and obtain more accurate data. The mouthpiece can better blow air into the gas storage tank. The scale on the water level tube can be achieved by, for example, sticking a scale strip on the water level tube to read the water level difference before and after blowing.

[0039] The icon area on the barrel includes a reading and vital capacity comparison table, an operation step diagram, a simple troubleshooting table, etc. The reading and vital capacity comparison table allows students to immediately understand their vital capacity data through the comparison table after the experiment; the operation step diagram allows students, especially those who are not familiar with the experimental process, to conduct experiments more accurately; the troubleshooting table is helpful for troubleshooting simple problems encountered during the operation. In addition, these charts can also increase the aesthetics of the device.

[0040] The troubleshooting table can be organized according to the problems that students often encounter in actual operation, for example, it can be shown in the following table:

[0041] Phenomenon reason Workaround The readings dropped significantly Check valve connection leaks Replace the check valve raw tape The readings dropped significantly Leakage at the exhaust valve connection Replace the exhaust valve raw tape Blowing water level unchanged Exhaust valve not closed Close the exhaust valve Blowing is difficult The air intake hose is bent and hinders air blowing Keep the air intake hose clear

[0042] The operation step diagram shows the specific operation steps. The specific operation steps of the device for measuring vital capacity of the utility model include:

[0043] (1) Place the barrel on a horizontal table and place the gas storage liner inside the barrel;

[0044] (2) Confirm that the exhaust valve is in the open state;

[0045] (3) Add tap water into the barrel until the scale on the water level tube reaches zero;

[0046] (4) Close the exhaust valve;

[0047] (5) Use the mouthpiece to blow air into the air storage tank. Do not blow again after changing the air;

[0048] (6) Look at the water level tube and read the water level scale value;

[0049] (7) Find the corresponding vital capacity value in the comparison table based on the reading;

[0050] (8) Open the exhaust valve, confirm that the water level has returned to zero, and repeat steps 4-7 for the second measurement.

[0051] The utility model is easy to operate and more intuitive to observe when measuring vital capacity. It can be measured by adding water to a fixed scale, blowing, and observing the water level reading, which is convenient for students to complete independently. The lung capacity measurement efficiency is high, and the mouthpiece can be replaced and reused after the measurement is completed. In addition to teaching demonstrations, it is also convenient for all students in the class to perform measurements, so that students can have a deeper experience of the experiment and the experimental effect is good. The entire device is integrated in design, simple to make, and convenient for teaching and promotion.

[0052] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A simple device for measuring vital capacity, characterized in that: The invention comprises a barrel body (1) and an air storage liner (2), wherein the air storage liner (2) is arranged in the barrel body (1); the barrel body (1) is provided with a water level pipe (11) which is in communication with the barrel body (1); the top end of the air storage liner (2) is provided with an air intake hose (21) and an air exhaust valve (22); and the bottom end of the air storage liner (2) is provided with a drainage hole (23).

2. A simple device for measuring vital capacity according to claim 1, characterized in that: It also includes a check valve (24), and one end of the air intake hose (21) is connected to the air storage liner (2) via the check valve (24).

3. A simple device for measuring vital capacity according to claim 2, characterized in that: The other end of the air intake hose (21) is connected to a nozzle (25).

4. A simple device for measuring vital capacity according to claim 1, characterized in that: The water level tube (11) is provided with a scale (13).

5. A simple device for measuring vital capacity according to claim 1, characterized in that: The barrel body (1) is provided with a chart area (12), wherein the chart area (12) includes a reading and vital capacity comparison table, an operation step diagram, and a simple troubleshooting table.

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