Sampling device for monitoring atmospheric pollutants

Abstract

The utility model relates to a sampling device for monitoring atmospheric pollutants, which comprises a sampling cylinder, a plurality of groups of sampling pipes distributed in the circumferential direction are arranged in the sampling cylinder, sealing structures are correspondingly arranged at the upper end and the lower end of each group of sampling pipes, each sealing structure comprises a sealing rod penetrating through the outer wall of the sampling cylinder in a sliding mode, and a sealing groove is formed in one side, close to the sealing rod, of each sampling pipe. The sealing rod penetrates through the outer wall of the sampling tube from the sealing groove in a sliding manner, and a sealing block matched with the sealing groove is arranged on the sealing rod; the lower end of the sampling cylinder is communicated with an air storage bin through a plurality of holes, the holes and the sampling pipes are distributed correspondingly, a piston driven by a core rod is arranged in the air storage bin in a sliding manner, and an exhaust hole sealed by a plunger is formed in one side of the air storage bin. The air sampling device is simple in structure and convenient to use, air of multiple sampling points can be collected and monitored at a time through one device, use of workers is facilitated, and sampling efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of gas monitoring technology, and specifically relates to a sampling device for monitoring air pollutants. Background Technology

[0002] Air pollution refers to the phenomenon where the concentration of pollutants in the atmosphere reaches harmful levels, damaging ecosystems and the conditions for normal human survival and development, and causing harm to people and property. Its causes include both natural and anthropogenic factors, with the latter being more significant. Air pollution monitoring refers to the process of measuring the types and concentrations of pollutants in the atmosphere and observing their spatiotemporal distribution and variation patterns. The purpose of air pollution monitoring is to identify pollutants in the atmosphere, understand their distribution and diffusion patterns, and monitor the emission and control of air pollution sources.

[0003] Utility model patent CN221528125U discloses a sampling device for air pollution detection. With its partition plate, sealing plug, small piston, and small baffle, this device makes it more convenient and faster for staff to collect air samples outdoors, eliminating waiting time. However, it has the following shortcomings: 1. The device can only extract air from one location at a time. When collecting air from multiple locations, multiple devices must be carried or a return trip is necessary, making it inconvenient. 2. The adsorption tubes need to be removed before the collected air can be analyzed. During disassembly, the samples may mix with the non-sampled air. Furthermore, the adsorption tubes are interconnected without sealing, leading to further mixing of samples and affecting the accuracy of the analysis. Utility Model Content

[0004] To address the existing technical problems, this utility model proposes a sampling device for monitoring air pollutants. The purpose of this utility model and the solution to its technical problems are achieved by the following technical solutions.

[0005] According to this utility model, a sampling device for monitoring air pollutants includes a sampling cylinder containing several groups of circumferentially distributed sampling tubes. Each group of sampling tubes has a sealing structure at both its upper and lower ends. The sealing structure includes a sealing rod that slides through the outer wall of the sampling cylinder. A sealing groove is provided on the side of the sampling tube near the sealing rod. The sealing rod slides through the sealing groove through the outer wall of the sampling tube, and a sealing block matching the sealing groove is provided on the sealing rod. The lower end of the sampling cylinder is connected to a gas storage chamber through several holes, which are distributed correspondingly to the sampling tubes. The gas outlet at the lower end of the sampling tube is connected to the holes. A piston driven by a core rod is slidably disposed in the gas storage chamber, and a plunger-sealed exhaust port is provided on one side of the gas storage chamber.

[0006] The beneficial effects are: by setting up several groups of sampling tubes concentrated in the same sampling cylinder, it is possible to collect gas from multiple observation points for monitoring. The structure is simple and easy to use. At the same time, both ends of the sampling tube are equipped with sealing blocks, and when detecting the gas in the sampling tube, there is no need to disassemble the parts, which can ensure that the sampled gas is not contaminated and improve the accuracy of the detection results.

[0007] Furthermore, the top of the sampling tube is equipped with a cover plate, and the cover plate has an air inlet.

[0008] The beneficial effects are: when the equipment is not in use, the cover can provide some protection for the sampling tube, preventing damage and maintaining the cleanliness of the sampling tube.

[0009] Furthermore, the sealing block has a first rubber pad at both the upper and lower ends, and the piston has a second rubber pad at the upper end.

[0010] The beneficial effects are: firstly, the rubber pad can further improve the sealing effect of the sampling tube, avoiding air leakage and external gas contamination; secondly, the rubber pad can ensure the performance of the gas storage chamber, making the piston exhaust and extraction work stable.

[0011] Furthermore, there are six groups of sampling tubes, with two sampling tubes in each group.

[0012] Furthermore, the cross-section of the sealing groove is semi-circular, the sealing block is circular, and the diameter of the sealing block and the diameter of the sealing groove cross-section are the same as the diameter of the inner wall of the sampling tube.

[0013] In summary, this utility model has a simple structure and is easy to use. It can collect and monitor air from multiple sampling points at a time with a single device, which is convenient for staff to use and improves sampling efficiency. At the same time, the upper and lower sealing blocks can prevent the mixing of samples, and the device does not need to be disassembled when testing samples, which reduces sample contamination and improves the accuracy of sample test results.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, preferred embodiments are given below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sampling device of this utility model.

[0016] Figure 2 This is a schematic diagram of the sampling device of this utility model with the cover plate removed.

[0017] Figure 3 yes Figure 2 Top view.

[0018] Figure 4 yes Figure 3 A sectional view.

[0019] Figure 5 This is a schematic diagram showing the connection between the sealing rod and the sampling tube.

[0020] Figure 6 This is a schematic diagram of the sealing block. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0022] An embodiment of a sampling device for monitoring air pollutants:

[0023] Please see Figures 1 to 6 A sampling device for monitoring air pollutants includes a sampling cylinder 1, a cover plate 7 on the top of the sampling cylinder 1, an air inlet 8 on the cover plate 7, and six sets of circumferentially distributed sampling tubes 2 inside the sampling cylinder 1. The sampling tubes 2 are hollow tubular structures, and each set of sampling tubes 2 has two tubes. Each set of sampling tubes 2 has a sealing structure at both the upper and lower ends. The sealing structure includes a sealing rod 3 that slides laterally and penetrates through the outer wall of the sampling cylinder 1. A sealing groove is provided on the side of the sampling tube 2 near the sealing rod 3. The sealing rod 3 slides through the outer wall of the sampling tube 2 from the sealing groove, and a sealing block 9 that matches the sealing groove is provided on the sealing rod 3. One sealing block 9 corresponds to one sealing groove. That is, the outer sealing block 9 is located between the inner wall of the sampling cylinder 1 and the sampling tube 2, and the inner sealing block 9 is located between the two sampling tubes 2. The upper and lower ends of the sealing block 9 are provided with a first rubber pad 14 to improve the sealing effect of the sampling tube 2 and avoid air leakage and external gas pollution.

[0024] The cross-section of the sealing groove is semi-circular, and the sealing block 9 is circular. The diameter of the sealing block 9 and the diameter of the sealing groove cross-section are the same as the diameter of the inner wall of the sampling tube 2.

[0025] In other embodiments of this example, the number of sampling tubes 2 can be set to more than six or less as needed. Correspondingly, the number of sealing structures also needs to be increased to further increase the number of monitoring points that can be collected at one time. At the same time, the number of sampling tubes 2 in each group can be more than two. Correspondingly, sealing blocks 9 corresponding to the number of sampling tubes 2 need to be set.

[0026] The lower end of the sampling tube 1 is connected to a gas storage chamber 5 through several holes 13. The holes 13 are distributed in a corresponding manner with the sampling tube 2, and the air outlet at the lower end of the sampling tube 2 is set in a corresponding manner with the holes 13. A piston 10 driven by a core rod 6 is slidably installed inside the gas storage chamber 5. A second rubber pad 12 is provided at the upper end of the piston 10 to ensure the effectiveness of the gas storage chamber 5 and to make the exhaust and suction of the piston 10 run stably. An exhaust port 11 sealed by a plunger 4 is provided on one side of the gas storage chamber 5.

[0027] The working process of this embodiment:

[0028] When staff use this utility model, they first arrive at the monitoring point, then release the seals at both ends of one set of sampling tubes 2 by pulling the two sealing rods 3 outwards to pull the sealing block 9 out of the sealing groove, thus releasing the seal. Then, sampling is performed (before sampling, the sampling tube 2 is rinsed three times with on-site gas to ensure the representativeness of the sample; the core rod 6 can be pulled up and down to rinse the sampling tube 2). After rinsing, the core rod 6 is pulled down to draw the sample air into the sampling tube 2, and then the two sealing rods 3 are pushed inwards to reset the sealing block 9, sealing the sampling tube 2 and completing the sampling).

[0029] When sampling at the next monitoring point, repeat the above steps using another set of sampling tubes 2;

[0030] After each set of sampling tubes 2 has been sampled, first open the vent 11 sealed by the plunger 4, and use a suction device (e.g., a suction pump) to extract the residual sample gas in the gas storage chamber 5. Then, release the seal at the lower end of one set of sampling tubes 2 by pulling the sealing rod 3 at the lower end of the sampling tube 2 outward while keeping the sealing rod 3 at the upper end stationary. Then, use a suction device to extract the sample gas for testing and analysis. After the analysis is completed, test the sample gas in the next set of sampling tubes 2.

[0031] The above description is merely a preferred embodiment of this utility model. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A sampling device for monitoring air pollutants, comprising a sampling tube (1), characterized in that: The sampling tube (1) is provided with several groups of sampling tubes (2) arranged in a circumferential direction. Each group of sampling tubes (2) has a sealing structure at both the upper and lower ends. The sealing structure includes a sealing rod (3) that slides through the outer wall of the sampling tube (1). The sampling tube (2) is provided with a sealing groove on the side near the sealing rod (3). The sealing rod (3) slides through the outer wall of the sampling tube (2) from the sealing groove, and a sealing block (9) matching the sealing groove is provided on the sealing rod (3). The lower end of the sampling tube (1) is connected to a gas storage chamber (5) through several holes (13). The holes (13) are distributed in a corresponding manner with the sampling tube (2), and the air outlet at the lower end of the sampling tube (2) is connected to the holes (13). A piston (10) driven by a core rod (6) is slidably provided in the gas storage chamber (5), and an exhaust port (11) sealed by a plunger (4) is provided on one side of the gas storage chamber (5).

2. The sampling device for monitoring air pollutants according to claim 1, characterized in that: The top of the sampling tube (1) is provided with a cover plate (7), and the cover plate (7) is provided with an air inlet (8).

3. The sampling device for monitoring air pollutants according to claim 1, characterized in that: The sealing block (9) has a first rubber pad (14) at both the upper and lower ends.

4. The sampling device for monitoring air pollutants according to claim 1, characterized in that: The piston (10) has a second rubber pad (12) at its upper end.

5. A sampling device for monitoring air pollutants according to claim 1, characterized in that: There are six groups of sampling tubes (2), and each group of sampling tubes (2) has two tubes.

6. A sampling device for monitoring air pollutants according to claim 1, characterized in that: The cross-section of the sealing groove is semi-circular, the sealing block (9) is circular, and the diameter of the sealing block (9) and the diameter of the cross-section of the sealing groove are the same as the diameter of the inner wall of the sampling tube (2).

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