Reusable detection box for nitrogen oxides in air

Abstract

The utility model relates to a reusable detection box for nitrogen oxides in air, which comprises an upper shell and a lower shell which are clamped with each other, the upper shell is provided with a developing observation opening which is positioned above a test strip connected with the inner bottom of the lower shell, and the inner bottom of the upper shell is connected with a developing liquid tank and an oxidation liquid tank which are also positioned above the test strip. Liquid bags are arranged in the liquid bags; a notch is formed in the side of the upper shell to install the elastic component, one end of an elastic body of the elastic component is connected with the puncture needle, the puncture needle is sleeved with the compression spring, and a through hole is formed in the notch and used for penetrating through the puncture needle and corresponds to the liquid bag. The elastic part is pushed to enable the puncture needle to puncture the liquid bag, liquid in the liquid bag flows out and falls into the test strip through the dripping hole, the concentration of the nitric oxide in the air can be judged through the developing observation opening, and in subsequent use, only the broken liquid bag needs to be taken out and replaced with a new one. According to the utility model, the use cost can be effectively reduced, and the effect of protecting the environment can be further realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air nitrogen oxide detection, in particular to a reusable air nitrogen oxide detection box. Background Art

[0002] Common pollutants in the air include nitrogen oxides, sulfur dioxide, various suspended particulate matter and carbon monoxide. Nitrogen oxides refer to compounds composed of only nitrogen and oxygen. x There are nitric oxide (NO), nitrogen dioxide (NO2), nitrogen pentoxide (N2O5), etc. Except for nitrogen pentoxide which is solid under normal conditions, other nitrogen oxides are gaseous under normal conditions. Nitrogen oxide pollution mainly comes from the combustion of coal, oil and other fuels used in production and life, followed by exhaust gas emitted from factories that produce or use nitric acid. When nitrogen oxides and hydrocarbons coexist in the air, they will react chemically after being exposed to ultraviolet rays from the sun, producing toxic secondary pollutants.

[0003] The air detection kit can quickly detect pollutants in the environment, so as to timely understand the severity of air pollution, as well as the types and concentrations of pollutants. By timely identifying the source and concentration of air pollution, corresponding treatment measures can be taken in time to better control and manage environmental pollution. Therefore, for nitrogen oxides with greater hazards, corresponding nitrogen oxide detection kits can also be used for rapid testing. However, most of the nitrogen oxide detection kits currently in common use are only for one-time use and cannot be reused. This will not only easily lead to an increase in its use cost, but also the discarded materials after the test will cause secondary environmental pollution. Therefore, there is an urgent need for a reusable detection kit for detecting nitrogen oxides in the air. Utility Model Content

[0004] The content of this utility model is used to introduce the concepts in a brief form, which will be described in detail in the following specific implementation. The content of this utility model is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In view of the problems and shortcomings in the prior art, the purpose is to provide a detection box for automatically detecting nitrogen oxides in the air. The utility model uses a puncture needle of an elastic component to puncture the liquid capsule bag, and the liquid in the liquid capsule bag falls onto the test strip through the drip holes at the bottom of the oxidation liquid tank and the color development liquid tank. After color development, the concentration of nitrogen oxides in the air can be determined through the color development observation port. The liquid capsule bag can be replaced and reused, which can further reduce the use cost and protect the environment. It is used to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising an upper shell and a lower shell that are clamped together, a test strip is installed at the bottom of the lower shell, a color development observation port is provided on the upper shell and is located above the test strip, the bottom of the upper shell is connected to a color development liquid tank and an oxidation liquid tank and is also located above the test strip, and liquid capsule bags are placed inside them, and a plurality of drip holes are provided at the bottom of the color development liquid tank and the oxidation liquid tank; a slot is provided on the side of the upper shell to install an elastic component, the elastic component comprises an elastic body, one end of the elastic body is connected to a puncture needle, a compression spring is provided on the outside of the puncture needle, and a through hole is provided in the slot for passing the puncture needle and corresponding to the liquid capsule bag.

[0007] Preferably, the inner bottom of the upper shell is also connected to a guide groove, and the guide groove is located on the inner side of the color developing liquid tank, and a plurality of drip holes are also provided at the bottom of the guide groove. If the guide groove is arranged on the inner side of the color developing liquid tank, the liquid capsule bag can be placed in the guide groove. When in use, the liquid capsule bag in the guide groove is punctured with a puncture needle, and the liquid in the liquid capsule bag immediately flows into the guide groove, and flows into the color developing tank through the drip holes at the bottom of the guide groove. When the puncture needle punctures the liquid capsule bag, the flow rate of the liquid inside it flowing out instantly can be slowed down.

[0008] Preferably, the diameter of the drip hole at the bottom of the guide groove is smaller than the diameter of the drip hole at the bottom of the color developing liquid tank. Since the guide groove and the color developing liquid tank are both provided with a plurality of drip holes at the bottom, setting the drip hole at the bottom of the guide groove smaller than the drip hole at the bottom of the color developing liquid tank can further reduce the flow rate of the liquid in the liquid capsule bag, and effectively prevent the splash of the liquid in the liquid capsule bag that suddenly ruptures. At the same time, it also leaves enough reaction time for the oxidizing liquid and the color developing liquid to drip onto the test strip.

[0009] Preferably, a positioning groove is provided on the elastic body, and the positioning groove cooperates with the limiting block provided on the inner side wall of the notch. A positioning groove is provided inwardly on the outer side of the elastic body, and a limiting block protruding outward is provided on the inner side wall of the notch on the side of the upper shell, and the limiting block is embedded in the positioning groove for installation. When in use, the elastic body of the elastic component is pressed down, and the elastic body moves forward in the notch, so that the limiting block also moves forward along the positioning groove, which can limit the movement range of the elastic component to a certain extent. It can ensure that the elastic component will not fall out of the notch, and it can also ensure that the puncture needle of the elastic component can accurately puncture the liquid capsule bag.

[0010] Preferably, the upper shell is provided with a first liquid addition observation port and a second liquid addition observation port. The upper shell is also provided with a first liquid addition observation port and a second liquid addition observation port in sequence, the first liquid addition observation port corresponds to the oxidation liquid tank, and the second liquid addition observation port corresponds to the color development liquid tank. Through the first liquid addition observation port and the second liquid addition observation port, it can be observed whether the liquid flowing out of the liquid capsule bag is completely dripped onto the test strip below, so as to improve the efficiency of nitrogen oxide detection in the air.

[0011] Preferably, the liquid capsule bag is made of polybutylene succinate. Polybutylene succinate is a polymer compound, and its structural unit contains an ester group that is easily hydrolyzed. Under conditions such as composting and contact with specific microorganisms, it is easily decomposed and metabolized by a variety of microorganisms in nature or enzymes in animals and plants, and finally forms carbon dioxide (CO2) and water (H2O), thereby avoiding pollution to the environment. Polybutylene succinate is a polymer with good biodegradability. Compared with biodegradable plastics such as polylactic acid, polyhydroxyalkanoate, and polycaprolactone, it has a relatively low price, excellent mechanical properties, and good heat resistance, and its heat deformation temperature can be close to 100°C.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model has the advantages of simple structure, convenient operation, accurate detection and high detection efficiency, and can be reused by replacing the liquid capsule bag. By installing the test strip at the bottom of the lower shell, the upper shell is provided with a color observation port, a first liquid addition observation port and a second liquid addition observation port and is located above the test strip. The first liquid addition observation port corresponds to the oxidation liquid tank, the second liquid addition observation port corresponds to the color development liquid tank, and then the liquid capsule bag is placed in both the oxidation liquid tank and the color development liquid tank. When in use, the elastic component is pushed so that the puncture needle punctures the liquid capsule bag, and the oxidation liquid and the color development absorption liquid in the liquid capsule bag flow out immediately, and fall onto the test strip through the drip holes at the bottom of the oxidation liquid tank and the color development liquid tank. After color development, the concentration of nitrogen oxides in the air can be judged through the color development observation port. When used next time, it is only necessary to open the upper shell and the lower shell, take out the broken liquid capsule bag and replace it with a new one. Therefore, the use of the utility model can have the characteristics of safety, environmental protection, quickness and simplicity, and low detection cost, and can further achieve the role of protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 : It is a side view structural schematic diagram of the utility model;

[0016] Figure 3 : It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 4 : It is a schematic diagram of the structure of the elastic component in the utility model;

[0018] Figure 5 : It is a structural schematic diagram of the limit block in the utility model.

[0019] Marked in the figure are: 1. upper shell; 2. lower shell; 3. elastic component; 301. limit block; 302. positioning groove; 303. elastic body; 304. puncture needle; 305. compression spring; 4. first liquid addition observation port; 5. second liquid addition observation port; 6. color development liquid tank; 7. oxidation liquid tank; 8. liquid capsule bag; 9. test strip; 10. guide groove; 11. color development observation port. DETAILED DESCRIPTION

[0020] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0021] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other. Example

[0022] This embodiment provides a reusable nitrogen oxide detection kit in the air, such as Figures 1 to 5 As shown: it includes an upper shell 1 and a lower shell 2 that are mutually engaged, a test strip 9 is installed at the bottom of the lower shell 2, a color development observation port 11 is opened on the upper shell 1 and is located above the test strip 9, and the bottom of the upper shell 1 is connected to the color development liquid tank 6 and the oxidation liquid tank 7, which are also located above the test strip 9, and a liquid capsule bag 8 is placed inside them, and a plurality of drip holes are provided at the bottom of the color development liquid tank 6 and the oxidation liquid tank 7; a slot is opened on the side of the upper shell 1 to install an elastic component 3, the elastic component includes an elastic body 301, one end of the elastic body 301 is connected to a puncture needle 304, a compression spring 305 is sleeved on the outside of the puncture needle 304, and a through hole is provided in the slot for passing the puncture needle 304 and corresponding to the liquid capsule bag 8. In particular, the color development liquid tank 6 and the oxidation liquid tank 7 are both provided with openings on the side for the puncture needle 304 to pass through and puncture the liquid capsule bag 8.

[0023] This embodiment also includes that the inner bottom of the upper shell 1 is connected to the guide groove 10, and the guide groove 10 is located on the inner side of the color development liquid tank 6, and the diameter of the drip hole opened at the bottom of the guide groove 10 is smaller than the diameter of the drip hole at the bottom of the color development liquid tank 6. When in use, the liquid capsule bag 8 is punctured by the puncture needle 304, and the liquid in the liquid capsule bag 8 immediately flows into the guide groove 10, and flows into the color development liquid tank 6 through the multiple drip holes opened at the bottom of the guide groove 10. Since the guide groove 10 and the color development liquid tank 6 are both provided with multiple drip holes at the bottom, and the drip holes at the bottom of the guide groove 10 are set to be smaller than the drip holes at the bottom of the color development liquid tank 6, the flow rate of the liquid inside the liquid capsule bag 8 can be effectively reduced, and the splashing of the liquid in the liquid capsule bag 8 that is suddenly ruptured can be prevented, and sufficient reaction time for the oxidizing liquid and the color development liquid on the test strip is also left.

[0024] This embodiment also includes that a positioning groove 302 is provided on the elastic body 301, and it cooperates with the limit block 301 provided on the inner side wall of the groove, and a first liquid addition observation port 4 and a second liquid addition observation port 5 are provided on the upper shell 1. The first liquid addition observation port 4 corresponds to the oxidation liquid tank 7, and the second liquid addition observation port 5 corresponds to the color development liquid tank 6. Through the first liquid addition observation port 4 and the second liquid addition observation port 5, it is observed whether the liquid flowing out of the liquid capsule bag 8 is completely dripped onto the test paper strip 9 below, so as to improve the efficiency of nitrogen oxide detection in the air. The limit block 301 is embedded in the positioning groove 302 for installation, so that the limit block 301 can move back and forth along the positioning groove 302 when in use, and the range of motion of the elastic component 3 can be limited to a certain extent. It can ensure that the elastic component 3 will not fall out of the groove, and it can also ensure that the puncture needle 304 of the elastic component 3 can accurately puncture the liquid capsule bag 8.

[0025] This embodiment also includes that the liquid capsule bag 8 is made of polybutylene succinate. Polybutylene succinate is a polymer with good biodegradability. Compared with biodegradable plastics such as polylactic acid, polyhydroxyalkanoate, and polycaprolactone, it has a relatively low price, excellent mechanical properties, and good heat resistance, and its heat deformation temperature can be close to 100°C. In addition, polybutylene succinate is easily decomposed and metabolized by various microorganisms or enzymes in animals and plants in nature, and finally forms carbon dioxide (CO2) and water (H2O), thereby avoiding pollution to the environment.

[0026] How to use this embodiment

[0027] At present, HJ 479-2009 "Determination of nitrogen oxides (nitric oxide and nitrogen dioxide) in ambient air by naphthylethylenediamine hydrochloride spectrophotometry" is often used for detection of nitrogen oxides in ambient air. It stipulates the spectrophotometric method for nitrogen oxides in ambient air, which is suitable for detecting nitrogen oxides, nitrogen dioxide and nitrogen monoxide in ambient air. First, nitrogen dioxide in the air will be absorbed by the absorption liquid in the first absorption bottle in series and react to form pink azo dye, while nitric oxide in the air will not react with the absorption liquid. It will be oxidized to nitrogen dioxide by the oxidation liquid in the oxidation bottle and absorbed by the absorption liquid in the second absorption bottle in series to form pink azo dye. By measuring the absorbance of the samples in the first and second absorption bottles respectively, the mass concentration of nitrogen dioxide and nitric oxide in the two absorption bottles can be calculated, and the sum of the two is the mass concentration of nitrogen oxides. The oxidation liquid usually uses an acidic potassium permanganate solution. The absorbing liquid is a mixture of a color developing liquid and water in proportion, and the color developing liquid is a mixed solution of p-aminobenzenesulfonic acid, N-(1-naphthyl)ethylenediamine hydrochloride, glacial acetic acid and a diluent.

[0028] The utility model includes an upper shell 1 and a lower shell 2, and the upper shell 1 and the lower shell 2 are easily disassembled and fixed by clamping. A test strip 9 is installed at the bottom of the lower shell 2, and the two ends of the test strip 9 are fixed by supporting clamping slots. A color observation port 11, a first liquid addition observation port 4 and a second liquid addition observation port 5 are sequentially opened on the upper shell 1, and the color observation port 11, the first liquid addition observation port 4 and the second liquid addition observation port 5 are all arranged above the test strip 9. The lower part of the first liquid addition observation port 4 corresponds to the oxidation liquid tank 7, and the lower part of the second observation liquid port 5 corresponds to the color development liquid tank 6, and a plurality of drip holes are opened at the bottom of the oxidation liquid tank 7 and the color development liquid tank 6. Liquid capsule bags 8 are stored in the oxidation liquid tank 7 and the color development liquid tank 6. The corresponding liquid capsule bag in the oxidation liquid tank 7 stores oxidation liquid for converting nitric oxide in the air into nitrogen dioxide, and the liquid capsule bag in the color development liquid tank 6 stores color development absorption liquid for absorbing the generated nitrogen dioxide and reacting to produce color change.

[0029] In particular, a notch is provided on the side of the upper shell 1 to install the elastic component 3. Specifically, the elastic component 3 includes an elastic body 303, which is a cylindrical structure. One end of the elastic body 303 is connected to the puncture needle 304, and a compression spring 305 is sleeved on the outside of the puncture needle 304. When in use, the elastic body 303 is pressed down on the outside of the upper shell 1, and the elastic body 303 drives the puncture needle 304 to move forward, that is, the puncture needle 304 passes through the through hole provided in the notch to puncture the liquid capsule bag 8 in the color developing liquid tank 6, and similarly, the liquid capsule bag 8 in the oxidation liquid tank 7 can also be punctured. The oxidizing liquid and the color developing absorption liquid in the liquid capsule bag 8 flow out, and the detection of nitrogen oxides in the air can be carried out. When the detection of nitrogen oxides needs to be carried out again in the future, it is only necessary to open the upper shell 1 and the lower shell 2, take out the punctured liquid capsule bag 8, discard it, and replace it with a new one, and the detection of nitrogen oxides in the air can be carried out again. In addition, a positioning groove 302 is provided inwardly on the outer side of the elastic body 303, and a limiting block 301 is connected to the inner wall of the groove. The positioning groove 302 and the limiting block 301 cooperate with each other to limit the movable position of the elastic component 3.

[0030] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element 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.

[0031] In addition to the above embodiments, the present invention may also have other implementation modes. For those skilled in the art, the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reusable nitrogen oxide detection box in air, comprising an upper shell (1) and a lower shell (2) that are locked together, characterized in that: A test strip (9) is installed at the bottom of the lower shell (2); a color development observation port (11) is provided on the upper shell (1) and is located above the test strip (9); a color development liquid tank (6) and an oxidation liquid tank (7) are connected to the bottom of the upper shell (1) and are also located above the test strip (9); a liquid capsule bag (8) is placed inside the color development liquid tank (6) and the oxidation liquid tank (7); a plurality of drip holes are provided at the bottom of the color development liquid tank (6) and the oxidation liquid tank (7); a slot is provided on the side of the upper shell (1) for installing an elastic component (3); the elastic component comprises an elastic body, one end of the elastic body is connected to a puncture needle (304), a compression spring (305) is sleeved on the outside of the puncture needle (304), and a through hole is provided in the slot for passing the puncture needle (304) and corresponding to the liquid capsule bag (8).

2. A reusable nitrogen oxide detection kit in the air according to claim 1, characterized in that: The inner bottom of the upper shell (1) is also connected to a guide groove (10), and the guide groove (10) is located on the inner side of the color developing liquid tank (6), and a plurality of drip holes are also provided at the bottom of the guide groove (10).

3. A reusable nitrogen oxide detection kit in air according to claim 2, characterized in that: The diameter of the drip hole at the bottom of the guide groove (10) is smaller than the diameter of the drip hole at the bottom of the color developing liquid tank (6).

4. A reusable nitrogen oxide detection kit in air according to claim 1, characterized in that: A positioning groove (302) is provided on the elastic body, and cooperates with a limiting block (301) provided on the inner side wall of the groove.

5. The reusable nitrogen oxide detection kit in the air according to claim 1, characterized in that: The upper shell (1) is provided with a first liquid adding observation port (4) and a second liquid adding observation port (5).

6. A reusable nitrogen oxide detection kit in air according to claim 1, characterized in that: The liquid capsule bag (8) is made of polybutylene succinate.

Images