Non-methane total hydrocarbon sampling device

Abstract

The utility model discloses a non-methane total hydrocarbon sampling device and belongs to the technical field of gas sampling. Comprising a box body, a sampler, a sampling tube, a controller and a sampling bag, the sampler is installed at the front end of the box body, the sampling tube is communicated with the sampler through a connecting tube, the controller is connected with the sampling tube through a connecting line, the sampling bag is placed in the box body, and the placing frame is rotatably installed on one side of the box body. According to the non-methane total hydrocarbon sampling device disclosed by the invention, all the components can be orderly arranged in the same box body, so that the portability and the operation convenience of equipment are remarkably improved, integrated portable sampling is realized, sampling personnel can easily carry the whole set of equipment to go to different sampling sites, the operation difficulty caused by scattered equipment is reduced, and the sampling efficiency is improved. The sampling efficiency and safety are improved, and meanwhile, the precise instrument is protected from being damaged in the transportation process.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, specifically to a non-methane total hydrocarbon sampling device. Background Technology

[0002] Non-methane hydrocarbons (NMH) are among the most important volatile organic compounds in the atmosphere, significantly impacting air quality, climate change, and human health. They participate in atmospheric photochemical reactions, generating secondary pollutants such as ozone, thus exacerbating atmospheric oxidation and photochemical smog formation. Furthermore, some NMHs are toxic, carcinogenic, and mutagenic, posing a potential threat to human health. Therefore, it is necessary to sample and detect gases in the air. When using the sampling device, connect the gas bag to the sampler outlet via a connector, ensuring a tight seal. If a heated sampling tube is used, connect one end of the tube to the sampler inlet and the other end to the sampling point. The heating temperature of the sampling tube can be set via a controller.

[0003] Existing sampling devices are used in conjunction with sampling tubes. During the sampling process, when sampling is required at different locations, the sampling personnel need to carry the various devices used in the sampling device to the next sampling location. The storage of these devices becomes a problem. Due to the lack of convenient carrying methods, the operation difficulty when picking them up is increased. Therefore, it is necessary to design a non-methane total hydrocarbon sampling device to solve the above problems. Utility Model Content

[0004] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a non-methane total hydrocarbon sampling device to solve the problem that the sampling equipment in the existing devices is not convenient to carry.

[0005] The technical solution adopted by this application to solve its technical problem is: a non-methane total hydrocarbon sampling device, including a box, a sampler, a sampling tube, a controller, and a sampling bag. The sampler is installed at the front end of the box, the sampling tube is connected to the sampler through a connecting tube, the controller is connected to the sampling tube through a connecting line, and the sampling bag is placed inside the box. The device also includes a placement frame and a placement plate. The placement frame is rotatably installed on one side of the box and is suitable for storing the controller. The placement plate is fixed on the other side of the box and is suitable for placing the sampling tube.

[0006] A fixed clamping plate is fixed to the front end of the placement plate, and a movable clamping plate is installed at the front end of the placement plate. The movable clamping plate can move relative to the fixed clamping plate, and a clamping space suitable for clamping and placing the sampling tube is formed between the fixed clamping plate and the movable clamping plate.

[0007] Furthermore, a support base is fixed to the rear end of the placement plate, and the support base has an arc-shaped recess suitable for supporting the sampling tube.

[0008] Furthermore, a limiting rod is fixed at the front end of the placement plate, and the movable clamp slides inside the placement plate along the limiting rod. A spring is sleeved on the outer wall of the limiting rod, and the spring pushes the movable clamp closer to the fixed clamp through its elastic force.

[0009] Furthermore, two arc-shaped grooves are provided on one side of the placement frame, and a locking block is fixed on one side of the box body. The locking block is snapped into the arc-shaped groove, which is suitable for limiting the placement frame.

[0010] Furthermore, the air inlet of the sampling tube is detachably equipped with a filter screen, which is suitable for filtering particulate matter in the sampled air.

[0011] Furthermore, one end of the sampling tube is provided with an annular groove, the filter screen is installed inside the annular groove, and one end of the sampling tube is provided with an installation sleeve, the installation sleeve and the sampling tube are connected by a thread, which is suitable for replacing the filter screen.

[0012] Furthermore, a sampling port is provided on one side of the sampler, and the other end of the sampling tube is threadedly connected to the air inlet of the sampling port. A flexible tube is connected to the air inlet of the sampling bag, and one end of the flexible tube is connected to the air outlet at the rear end of the sampler.

[0013] Furthermore, the upper part of the box body is connected to a box lid, the middle part of the box lid is provided with an exhaust valve, the front end of the box lid is connected to an upper buckle, the front end of the box body is provided with a lower buckle, the upper buckle is engaged inside the lower buckle, and the sealing ring provided at the lower end of the box lid is tightly fitted to the box body.

[0014] Furthermore, a carrying strap is attached to the upper part of the box.

[0015] The beneficial effects of this application are as follows: This application provides a non-methane total hydrocarbon sampling device. The main body of the device is a box. A sampler is installed at the front end for absorbing gas samples. The sampler is connected to the sampling tube through a connecting pipe to ensure the effective transmission of gas samples. The controller is connected to the sampling tube through a connecting line and can control the heating temperature of the sampling tube to ensure sample quality. The placement frame is rotatably installed on one side of the box and is specifically used to store the controller. The angle can be adjusted as needed. The placement plate is fixed on the other side of the box and is used to place the sampling tube. The fixed clamp and the movable clamp at the front end form an adjustable clamping space, which can firmly clamp sampling tubes of different specifications.

[0016] This structural design allows all components to be arranged in an orderly manner within the same box, significantly improving the portability and ease of operation of the equipment. It enables integrated portable sampling, allowing sampling personnel to easily carry the entire set of equipment to different sampling locations, reducing operational difficulties caused by scattered equipment, improving sampling efficiency and safety, and also protecting precision instruments from damage during transportation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a non-methane total hydrocarbon sampling device according to an embodiment of this application;

[0019] Figure 2 This is a left-side perspective three-dimensional structural schematic diagram of a non-methane total hydrocarbon sampling device according to an embodiment of this application;

[0020] Figure 3 This is a rear-view perspective structural diagram of a non-methane total hydrocarbon sampling device according to an embodiment of this application;

[0021] Figure 4 This is a three-dimensional structural diagram of the box body according to an embodiment of this application;

[0022] Figure 5 This is a three-dimensional structural diagram showing the placement and installation of the heating sampling tube and controller according to an embodiment of this application;

[0023] Figure 6 This is a three-dimensional structural diagram of the placement plate, fixed clamping plate, movable clamping plate and support base when they are in conjunction according to an embodiment of this application.

[0024] Figure 7 This is an exploded three-dimensional structural diagram of the sampling tube according to an embodiment of this application.

[0025] The following are the labeling elements in the figure:

[0026] 1. Box body; 2. Box lid; 3. Sampler; 4. Sampling tube; 5. Controller; 6. Sampling bag; 7. Tube; 8. Placement frame; 9. Placement plate; 10. Locking block; 11. Fixing clamp; 12. Movable clamp; 13. Limiting rod; 14. Spring; 15. Support base; 16. Annular groove; 17. Filter screen; 18. Mounting sleeve; 19. Exhaust valve; 20. Upper buckle; 21. Lower buckle; 22. Sampling port; 23. Shoulder strap; 24. Arc groove. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] like Figure 1 - Figure 7 As shown, this application provides a non-methane total hydrocarbon sampling device, including a box body 1, a sampler 3, a sampling tube 4, a controller 5, and a sampling bag 6. The sampler 3 is installed at the front end of the box body 1. The sampling tube 4 is connected to the sampler 3 through a connecting tube. The controller 5 is connected to the sampling tube 4 through a connecting line. The sampling bag 6 is placed inside the box body 1. The device also includes a placement frame 8 and a placement plate 9. The placement frame 8 is rotatably installed on one side of the box body 1 and is suitable for storing the controller 5. The placement plate 9 is fixed on the other side of the box body 1 and is suitable for placing the sampling tube 4.

[0030] A fixed clamping plate 11 is fixed to the front end of the placement plate 9, and a movable clamping plate 12 is installed at the front end of the placement plate 9. The movable clamping plate 12 can move relative to the fixed clamping plate 11, and a clamping space suitable for clamping and placing the sampling tube 4 is formed between the fixed clamping plate 11 and the movable clamping plate 12.

[0031] In the above design, the box body 1 serves as the support and protection structure for the entire device. The box body 1 is made of a sturdy and durable material, possessing sufficient strength and sealing. The sampler 3 is installed at the front end of the box body 1 and employs advanced pump-suction or diffusion sampling technology to efficiently and accurately extract air samples. The sampling tube 4 is a heated sampling tube, which is connected to the sampler 3 via a connecting tube and is responsible for transmitting air samples to the sampler 3. The inner wall of the sampling tube 4 is smooth to reduce sample loss during transmission. The controller 5 is electrically connected to the sampling tube 4 via a connecting wire and is responsible for controlling the start and stop of the heating function of the sampling tube 4. The placement frame 8 is laid flat and the controller 5 is placed inside the placement frame 8 for easy removal. By pushing the movable clamp 12 inward toward the fixed clamp 11, the sampling tube 4 can be firmly clamped. When lifting the box body 1, the equipment used can be lifted together.

[0032] The sampling bag 6 is placed inside the box 1 and is made of inert material to avoid chemical reaction with the sample. The sampling bag 6 has sufficient capacity to store the sampled air sample and is equipped with a valve to control the air outlet.

[0033] like Figure 7 As shown, a support base 15 is fixed at the rear end of the placement plate 9, which is suitable for supporting the sampling tube 4. A limit rod 13 is fixed at the front end of the placement plate 9. The movable clamping plate 12 slides along the limit rod 13 inside the placement plate 9. A spring 14 is sleeved on the outer wall of the limit rod 13. The spring 14 pushes the movable clamping plate 12 close to the fixed clamping plate 11 by elastic force.

[0034] In the above design, pulling the movable clamp 12 outward can compress the spring 14, so the elastic force of the spring 14 can push the movable clamp 12 inward close to the fixed clamp 11, thereby firmly clamping the sampling tube 4. At the same time, the movable clamp 12 can slide along the limiting rod 13 to accommodate sampling tubes 4 of different diameters. The support base 15 is designed at the rear end of the placement plate 9 to support the other end of the sampling tube 4 and ensure that the sampling tube 4 remains balanced when placed.

[0035] like Figure 2 As shown, two arc-shaped grooves 24 are opened on one side of the placement frame 8, and a locking block 10 is fixed on one side of the box body 1. The locking block 10 is snapped into the arc-shaped groove 24, which is suitable for limiting the placement frame 8.

[0036] In the above design, when the placement frame 8 is not in use, it can be rotated to a vertical position and the locking block 10 can be engaged inside the arc groove 24 to limit and fix the placement frame 8, preventing it from shaking or falling off. When it is needed, the opposite operation is performed.

[0037] like Figure 7 As shown, the air inlet of the sampling tube 4 is detachably equipped with a filter screen 17, which is suitable for filtering particulate matter in the sampled air. One end of the sampling tube 4 is provided with an annular groove 16, and the filter screen 17 is installed inside the annular groove 16. One end of the sampling tube 4 is provided with an installation sleeve 18, which is threadedly connected to the sampling tube 4, suitable for replacing the filter screen 17.

[0038] In the above design, the filter screen 17 is installed at the air inlet of the sampling tube 4 and is made of high-efficiency filter material, which can effectively remove particulate matter and impurities in the air. The mounting sleeve 18 is connected to the sampling tube 4 by a thread to ensure that the filter screen 17 is securely installed. At the same time, the design of the mounting sleeve 18 makes it easy to disassemble and replace the filter screen 17.

[0039] like Figure 4As shown, a sampling port 22 is provided on one side of the sampler 3, and the other end of the sampling tube 4 is threaded to the sampling port 22. The air inlet of the sampling bag 6 is connected to a hose 7, and one end of the hose 7 is connected to the rear end of the sampler 3.

[0040] In the above design, the other end of the sampling tube 4 is threaded to the sampling port 22, the sampling bag 6 is connected to the hose 7, and one end of the hose 7 is connected to the sampler 3. This design facilitates the disassembly and cleaning of the sampling tube 4 and the hose 7, ensuring the accuracy and reliability of the sampling process.

[0041] like Figure 5 As shown, the upper part of the box body 1 is connected to the box cover 2, the middle part of the box cover 2 is provided with an exhaust valve 19, the front end of the box cover 2 is connected to the upper buckle 20, the front end of the box body 1 is provided with the lower buckle 21, the upper buckle 20 is engaged inside the lower buckle 21, and the sealing ring provided at the lower end of the box cover 2 is tightly fitted with the box body 1.

[0042] In the above design, during the sampling process, the air inside the box body 1 is discharged by opening the exhaust valve 19, the negative pressure environment is relieved, and the box cover 2 can be opened. The upper buckle 20 is then engaged inside the lower buckle 21, so that the box cover 2 is tightly fixed to the box body 1. At the same time, the sealing ring set at the lower end of the box cover 2 is tightly fitted with the box body 1 to prevent air leakage.

[0043] like Figure 1 As shown, a shoulder strap 23 is connected to the upper part of the box 1;

[0044] In the above design, the shoulder strap 23 makes it convenient for sampling personnel to carry and move the entire device, improving the convenience and efficiency of sampling work.

[0045] Working principle: First, correctly install the sampling bag 6 onto the hose 7 and check its sealing performance to ensure that the sampling bag 6 is undamaged and leak-free, so as to ensure the accuracy of the sampling results. Then, fix the box cover 2 onto the box body 1 with the upper buckle 20 and the lower buckle 21, and check the overall sealing performance of the device to ensure that the device will not leak during the sampling process, which would affect the sampling results.

[0046] Start the sampler 3 to begin working. The sampler 3 uses a pump to expel the air inside the housing 1, creating a negative pressure that allows the air to enter the sampling tube 4. When the air sample passes through the sampling tube 4, it is first filtered by the filter screen 17 to remove particulate matter and impurities. Then, it is transferred through the hose 7 to the sampling bag 6 for collection. After sampling is completed, a certain amount of non-methane total hydrocarbon sample will be collected in the sampling bag 6 for subsequent analysis.

[0047] Open the exhaust valve 19 to release the negative pressure environment so that the box cover 2 can be opened. Open the box cover 2, take out the sampling bag 6 and seal it for preservation. The sampling bag 6 should be stored in a cool and dry place, avoiding direct sunlight and high temperature environment to ensure the stability of the sample. When it is necessary to go to the next location for sampling, install the sampling tube 4 on the placement plate 9 and clamp and limit it with the fixed clamp 11 and the movable clamp 12 to ensure that the sampling tube 4 is placed stably. At the same time, place the controller 5 in the rotating placement frame 8, which can be used as needed, thereby improving the convenience of equipment use.

[0048] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A non-methane total hydrocarbon sampling device, comprising a housing (1), a sampler (3), a sampling tube (4), a controller (5), and a sampling bag (6), wherein the sampler (3) is installed at the front end of the housing (1), the sampling tube (4) is connected to the sampler (3) via a connecting tube, the controller (5) is connected to the sampling tube (4) via a connecting wire, and the sampling bag (6) is placed inside the housing (1), characterized in that: It also includes a placement frame (8) and a placement plate (9). The placement frame (8) is rotatably mounted on one side of the box body (1) and is suitable for storing the controller (5). The placement plate (9) is fixed on the other side of the box body (1) and is suitable for storing the sampling tube (4). The placement plate (9) is fixed with a fixed clamping plate (11) at the front end, and a movable clamping plate (12) is installed at the front end of the placement plate (9). The movable clamping plate (12) can move relative to the fixed clamping plate (11), and a clamping space suitable for clamping and placing the sampling tube (4) is formed between the fixed clamping plate (11) and the movable clamping plate (12).

2. The non-methane total hydrocarbon sampling device according to claim 1, characterized in that: The rear end of the placement plate (9) is fixed with a support base (15), and the support base (15) has an arc-shaped recess suitable for supporting the sampling tube (4).

3. The non-methane total hydrocarbon sampling device according to claim 2, characterized in that: The placement plate (9) has a limiting rod (13) fixed at its front end. The movable clamping plate (12) slides inside the placement plate (9) along the limiting rod (13). A spring (14) is sleeved on the outer wall of the limiting rod (13). The spring (14) pushes the movable clamping plate (12) close to the fixed clamping plate (11) by elastic force.

4. The non-methane total hydrocarbon sampling device according to claim 1, characterized in that: Two arc-shaped grooves (24) are provided on one side of the placement frame (8), and a locking block (10) is fixed on one side of the box body (1). The locking block (10) is snapped into the arc-shaped groove (24) and is suitable for limiting the placement frame (8).

5. The non-methane total hydrocarbon sampling device according to claim 1, characterized in that: The air inlet of the sampling tube (4) is detachably equipped with a filter screen (17), which is suitable for filtering particulate matter in the sampled air.

6. The non-methane total hydrocarbon sampling device according to claim 5, characterized in that: One end of the sampling tube (4) is provided with an annular groove (16), and the filter screen (17) is installed inside the annular groove (16). One end of the sampling tube (4) is provided with an installation sleeve (18), and the installation sleeve (18) is threadedly connected to the sampling tube (4), which is suitable for replacing the filter screen (17).

7. The non-methane total hydrocarbon sampling device according to claim 1, characterized in that: The sampler (3) has a sampling port (22) on one side, and the other end of the sampling tube (4) is threaded to the air inlet of the sampling port (22). The air inlet of the sampling bag (6) is connected to a hose (7), and one end of the hose (7) is connected to the air outlet of the sampler (3).

8. A non-methane total hydrocarbon sampling device according to claim 1, characterized in that: The upper part of the box body (1) is connected to the lid (2), the middle part of the lid (2) is provided with an exhaust valve (19), the front end of the lid (2) is connected with an upper buckle (20), the front end of the box body (1) is provided with a lower buckle (21), the upper buckle (20) is engaged inside the lower buckle (21), and the sealing ring provided at the lower end of the lid (2) is tightly fitted to the box body (1).

9. A non-methane total hydrocarbon sampling device according to claim 1, characterized in that: The upper part of the box (1) is connected to a shoulder strap (23).

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