Automatic sampling device of carbon dioxide concentration meter

Abstract

The utility model discloses an automatic sampling device of a carbon dioxide concentration meter, which relates to the technical field of carbon dioxide sampling and comprises a box body, a controller is arranged on the right side of the front end of the box body, a rectangular opening is formed in the middle of the front end of the box body in a penetrating manner, and observation glass is arranged in the rectangular opening. The left side of the upper end of the box body is fixedly connected with a treatment box, and entering gas can be gradually purified through a movable frame which is sequentially provided with activated carbon, a molecular sieve and a gas separation membrane, firstly, the activated carbon can adsorb organic gas and part of inorganic gas; then the molecular sieve selectively adsorbs moisture in other micromolecular gases and mixed gases according to the molecular size, and finally, the gas separation membrane further realizes fine separation, so that various interference gases except carbon dioxide are effectively removed, interference of the interference gases on carbon dioxide detection is reduced, and the detection accuracy is improved. Therefore, the accuracy of a carbon dioxide concentration detection result is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide sampling technology, specifically to an automatic sampling device for a carbon dioxide concentration meter. Background Technology

[0002] A carbon dioxide concentration meter is an instrument used to measure the concentration of carbon dioxide in the environment. It has wide applications in many fields such as environmental monitoring, industrial production, and agricultural planting. The sampling device, as an important supporting equipment for the carbon dioxide concentration meter, is designed to automatically and accurately collect gas samples from different environments and transport them to the carbon dioxide concentration meter for analysis and detection.

[0003] Most sampling devices, when sampling external gases, send carbon dioxide and other gases from the air to a carbon dioxide concentration meter for analysis and detection. Since other gases may interfere with carbon dioxide in the detection principle, the accuracy of carbon dioxide detection results is greatly reduced. Based on this, this solution provides an automatic sampling device for a carbon dioxide concentration meter to solve the above-mentioned problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, an automatic sampling device for a carbon dioxide concentration meter is provided. This technical solution solves the problem that most sampling devices mentioned in the background technology will send carbon dioxide and other gases in the air to the carbon dioxide concentration meter for analysis and detection during the sampling of external gases. Since other gases may interfere with carbon dioxide in the detection principle, the accuracy of carbon dioxide detection results will be greatly reduced.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an automatic sampling device for a carbon dioxide concentration meter, comprising a housing, a controller located on the right side of the front end of the housing, a rectangular opening penetrating through the middle of the front end of the housing, an observation glass located inside the rectangular opening, a processing box fixedly connected to the upper left side of the housing, three limiting grooves located at the front end of the processing box, each of the three limiting grooves containing a movable frame, a handle fixedly connected to the front end of the movable frame, activated carbon, a molecular sieve, and a gas separation membrane arranged sequentially from right to left inside the three movable frames, an air pump located on the left side inside the housing, the lower end of the air pump fixedly installed at the bottom of the housing, a concentration meter body fixedly connected to the front end of the housing, a first connecting pipe fixedly connected to the input end of the air pump, a second support block fixedly connected to the outer surface of the first connecting pipe, the right end of the second support block fixedly connected to the upper left side of the housing, the right end of the first connecting pipe connected to the interior of the processing box, the output end of the air pump fixedly connected to a second connecting pipe, and the right end of the second connecting pipe connected to the input end of the concentration meter body.

[0006] Preferably, the output end of the concentration meter body is fixedly connected to an air outlet pipe, and a third support block is fixedly connected to the outer surface of the air outlet pipe. The lower end of the third support block is fixedly connected to the inner bottom of the box.

[0007] Preferably, the left end of the vent pipe extends to the outside of the housing, and a second valve is fixedly connected to the outer surface of the vent pipe.

[0008] Preferably, an air inlet pipe is fixedly connected to the right end of the processing box, and a first support block is fixedly connected to the outer surface of the air inlet pipe. The lower end of the first support block is fixedly connected to the upper end of the box.

[0009] Preferably, the upper end of the air intake pipe is provided with an air collection hood, the upper end of the air collection hood is fixedly connected with a filter plate, and the outer surface of the air intake pipe and the lower side of the air collection hood are fixedly installed with a first valve.

[0010] Compared with the prior art, the present invention provides an automatic sampling device for a carbon dioxide concentration meter, which has the following beneficial effects:

[0011] This invention utilizes a movable frame sequentially containing activated carbon, a molecular sieve, and a gas separation membrane to progressively purify incoming gas. First, the activated carbon adsorbs organic gases and some inorganic gases. Then, the molecular sieve selectively adsorbs other small molecule gases and moisture from the mixed gas according to their molecular size. Finally, the gas separation membrane further achieves fine separation, effectively removing various interfering gases other than carbon dioxide and reducing their interference with carbon dioxide detection, thereby significantly improving the accuracy of carbon dioxide concentration detection results. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the processing box in this utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of the box in this utility model;

[0015] Figure 4 This is a schematic diagram of the structure after removing the box body in this utility model.

[0016] The numbers on the map are:

[0017] 1. Housing; 2. Controller; 3. Rectangular opening; 4. Observation glass; 5. Processing box; 6. Limiting groove; 7. Movable frame; 8. Handle; 9. Activated carbon; 10. Molecular sieve; 11. Gas separation membrane; 12. Inlet pipe; 13. Gas collection hood; 14. Filter plate; 15. First valve; 16. First support block; 17. First connecting pipe; 18. Second support block; 19. Air pump; 20. Concentration meter body; 21. Second connecting pipe; 22. Outlet pipe; 23. Second valve; 24. Third support block. Detailed Implementation

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0019] Reference Figures 1-4As shown, an automatic sampling device for a carbon dioxide concentration meter includes a housing 1. A controller 2 is located on the right side of the front end of the housing 1. The controller 2 can be of model S7-1200. Any existing controller 2 capable of performing this function can be used, without limitation. The controller 2 is electrically connected to the air pump 19 and the concentration meter body 20. The controller 2 can control the start and stop of the air pump 19 and the data acquisition and processing of the concentration meter body 20. The data on the display screen of the concentration meter body can be observed through the observation glass 4. A rectangular opening 3 is formed through the middle of the front end of the housing 1, and the observation glass 4 is located inside the rectangular opening 3. A processing box 5 is fixedly connected to the upper left side of the housing 1. The front end of the processing box 5 has three limiting grooves 6. Each of the three movable frames 7 has an internal movable frame 7. Inside the movable frame 7, there is a supporting grid to support the activated carbon 9 and molecular sieve 10, ensuring sufficient strength and stability and uniformly distributing the weight of the activated carbon 9 and molecular sieve 10. The movable frame 7 is plugged into the limiting groove 6, and a sealing gasket is provided between the movable frame 7 and the limiting groove 6 to ensure that the gas inside the treatment box 5 does not leak from the connection between the movable frame 7 and the limiting groove 6. A handle 8 is fixedly connected to the front end of the movable frame 7. The three movable frames 7 contain, from right to left, activated carbon 9, molecular sieve 10 and gas separation membrane 11. Activated carbon 9 has a highly developed pore structure and a large specific surface area, which enables it to separate organic gases and some inorganic gases in the mixed gas through van der Waals forces. The adsorption on its surface reduces the content of impurity gases in the mixed gas, minimizing potential interference with carbon dioxide detection. Molecular sieve 10 is a 5A molecular sieve; the charge distribution and pore structure of the 5A molecular sieve 10 surface can adsorb gases such as nitrogen and oxygen in the mixed gas. When the mixed gas, after preliminary purification by activated carbon 9 and molecular sieve 10, passes through the gas separation membrane 11 under pressure difference, carbon dioxide has a relatively high permeability to this membrane and can preferentially pass through, while other residual impurity gases have difficulty passing through. This further separates carbon dioxide from other impurity gases, greatly improving the purity of carbon dioxide entering the concentration meter body 20 and minimizing interference from other gases on carbon dioxide concentration detection, thereby significantly improving... To ensure the accuracy of the test results, an air pump 19 is installed on the left side inside the housing 1. The lower end of the air pump 19 is fixedly installed at the bottom of the housing 1. A concentration meter body 20 is fixedly connected to the front end of the housing 1. The concentration meter body 20 receives samples from the first connecting tube 17 and the second connecting tube 21, and uses its internal detection technology to accurately measure the carbon dioxide concentration in the sample. During the measurement process, the signal processing circuit inside the concentration meter converts the detected physical signal into an electrical signal, and performs amplification, filtering, and other processing, finally displaying the carbon dioxide concentration value in digital form on the display screen. The input end of the air pump 19 is fixedly connected to the first connecting tube 17, and a second support block 18 is fixedly connected to the outer surface of the first connecting tube 17.The right end of the second support block 18 is fixedly connected to the upper left side of the housing 1. The right end of the first connecting pipe 17 is connected to the interior of the processing box 5. The output end of the air pump 19 is fixedly connected to the second connecting pipe 21, and the right end of the second connecting pipe 21 is connected to the input end of the concentration meter body 20.

[0020] Reference Figures 3-4 As shown, the output end of the concentration meter body 20 is fixedly connected to an outlet pipe 22. A third support block 24 is fixedly connected to the outer surface of the outlet pipe 22. The lower end of the third support block 24 is fixedly connected to the bottom of the inner part of the housing 1. The left end of the outlet pipe 22 extends to the outside of the housing 1. A second valve 23 is fixedly connected to the outer surface of the outlet pipe 22. The right end of the processing box 5 is fixedly connected to an inlet pipe 12. A first support block 16 is fixedly connected to the outer surface of the inlet pipe 12. The lower end of the first support block 16 is connected to the housing 1. The upper end of the inlet pipe 12 is fixedly connected to the gas collection hood 13. The upper end of the gas collection hood 13 is fixedly connected to the filter plate 14. The filter plate 14 can prevent large solid impurities from accumulating on the activated carbon 9, molecular sieve 10 and gas separation membrane 11 by pre-intercepting large solid particles. This allows the activated carbon 9, molecular sieve 10 and gas separation membrane 11 to focus more on the adsorption and separation of various molecules in the gas. The outer surface of the inlet pipe 12 and the lower side of the gas collection hood 13 are fixedly installed with a first valve 15.

[0021] The working principle and usage process of this utility model are as follows: When in use, place the device in a suitable area, then open the first valve 15. Next, the controller 2 controls the air pump 19 to start, generating suction. The filter plate 14 blocks large dust particles from entering, while simultaneously transporting external gas through the gas collection hood 13 and the inlet pipe 12 into the processing chamber 5. The processing chamber 5 contains activated carbon 9, a molecular sieve 10, and a gas separation membrane 11. First, the activated carbon 9 adsorbs organic gases and some inorganic gases in the mixed gas through van der Waals forces, thereby reducing the content of these impurity gases. Then, the molecular sieve 10 further removes nitrogen, oxygen, water vapor, etc., from the mixed gas, while allowing carbon dioxide to pass through smoothly. Finally, the gas separation membrane 11 achieves fine separation, significantly reducing the content of gases other than carbon dioxide, thus significantly improving the purity of carbon dioxide. The treated carbon dioxide then enters the concentration meter body 20 through the first connecting pipe 17 and the second connecting pipe 21. The concentration meter body 20 detects the carbon dioxide concentration in this area. After detection, the second valve 23 is opened, and the carbon dioxide is discharged from the outlet pipe 22.

[0022] 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 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic sampling device for a carbon dioxide concentration meter, characterized in that: The enclosure includes a housing (1), a controller (2) located on the right side of the front end of the housing (1), a rectangular opening (3) extending through the middle of the front end of the housing (1), an observation glass (4) located inside the rectangular opening (3), a processing box (5) fixedly connected to the upper left side of the housing (1), three limiting grooves (6) located at the front end of the processing box (5), each of the three limiting grooves (6) having a movable frame (7) inside, a handle (8) fixedly connected to the front end of the movable frame (7), activated carbon (9), a molecular sieve (10) and a gas separation membrane (11) arranged sequentially from right to left inside the three movable frames (7), and an air pump (19) located on the left side inside the housing (1). The lower end of the air pump (19) is fixedly installed at the bottom of the inside of the box (1). The front end of the inside of the box (1) is fixedly connected to the concentration meter body (20). The input end of the air pump (19) is fixedly connected to the first connecting pipe (17). The outer surface of the first connecting pipe (17) is fixedly connected to the second support block (18). The right end of the second support block (18) is fixedly connected to the upper left side of the box (1). The right end of the first connecting pipe (17) is connected to the inside of the processing box (5). The output end of the air pump (19) is fixedly connected to the second connecting pipe (21). The right end of the second connecting pipe (21) is connected to the input end of the concentration meter body (20).

2. The automatic sampling device for a carbon dioxide concentration meter according to claim 1, characterized in that: The output end of the concentration meter body (20) is fixedly connected to the gas outlet pipe (22), and the outer surface of the gas outlet pipe (22) is fixedly connected to the third support block (24). The lower end of the third support block (24) is fixedly connected to the inner bottom of the box body (1).

3. The automatic sampling device for a carbon dioxide concentration meter according to claim 2, characterized in that: The left end of the vent pipe (22) extends to the outside of the housing (1), and a second valve (23) is fixedly connected to the outer surface of the vent pipe (22).

4. The automatic sampling device for a carbon dioxide concentration meter according to claim 1, characterized in that: The right end of the processing box (5) is fixedly connected to an air inlet pipe (12), and the outer surface of the air inlet pipe (12) is fixedly connected to a first support block (16). The lower end of the first support block (16) is fixedly connected to the upper end of the box body (1).

5. The automatic sampling device for a carbon dioxide concentration meter according to claim 4, characterized in that: The upper end of the air inlet pipe (12) is provided with an air collection hood (13), and the upper end of the air collection hood (13) is fixedly connected with a filter plate (14). The outer surface of the air inlet pipe (12) and the lower side of the air collection hood (13) are fixedly installed with a first valve (15).

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