Pollution source VOCs sampling device

Abstract

The utility model provides a pollution source VOCs (Volatile Organic Compounds) sampling device which comprises a positioning piece, a positioning bolt fixed on the positioning piece, a sampling barrel arranged on the inner side of the positioning piece, a sample storage barrel arranged on the inner side of the sampling barrel, a stand column which penetrates through the top of the sample storage barrel and is in sliding connection with the top of the sample storage barrel, and a push plate positioned in the sample storage barrel is fixed at the bottom end of the stand column; the top of the sampling barrel is provided with a through hole for the stand column to pass through; a connecting frame is fixed to the top of the sampling barrel, a screw connected with the stand column is in threaded connection with the connecting frame, and a push rod used for driving the connecting frame to ascend and descend is arranged on the positioning piece. According to the soil sampling device, a worker can conveniently take out a soil sample in the sample storage barrel, the operation process is simple and rapid, a large number of samples cannot be left in the sample storage barrel, and the worker can conveniently clean the interior of the sample storage barrel subsequently.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, and in particular to a sampling device for VOCs pollution sources. Background Technology

[0002] The main components of VOCs include hydrocarbons, halogenated hydrocarbons, oxygenated hydrocarbons, and nitrogenous hydrocarbons. These include benzene compounds, organochlorides, Freon series, organic ketones, amines, alcohols, ethers, esters, acids, and petroleum hydrocarbons. Polycyclic aromatic hydrocarbons (PAHs), which are teratogenic and carcinogenic, are a major threat to human health and are representative of volatile pollutants. Soil is a component of the unified geographical environment; it refers to the loose layer covering the Earth's land surface that allows plants to grow. Soil environmental quality is related to agricultural product safety, ecological security, and human health. Soil release is a source of VOCs pollution in the air. Therefore, in recent years, the measurement of VOCs in soil has become increasingly widespread, becoming an important part of soil remediation and atmospheric VOCs control.

[0003] For example, Chinese utility model patent application number CN202123315725.4 discloses a VOCs sampler for pollution sources, which includes a positioning component, a pressing component movably connected to the positioning component, a sampling tube, and a storage tube. Both the sampling tube and the storage tube have an open end and a bottom surface at the other end. When the storage tube is embedded in the sampling tube, the outer wall of the storage tube is in contact with the inner wall of the sampling tube, and the outer bottom surface is in contact with the inner bottom surface of the sampling tube. During sampling, the storage tube is embedded in the sampling tube, allowing soil to directly enter the storage tube. Then, the storage tube is removed from the sampling tube and directly sealed, eliminating the need for transporting the extracted soil sample. This effectively prevents VOCs volatilization. After one sampling is completed, a new storage tube can be used for the next sampling, improving sampling efficiency. Furthermore, the outer wall of the sampling tube remains clean during sampling, allowing for direct storage or transportation, making it more practical.

[0004] Although the above-mentioned sampler eliminates the need to transport the collected soil samples, effectively preventing VOCs volatilization, it makes it difficult for staff to remove the samples when they adhere tightly inside the sample storage tube. Staff need to repeatedly shake or tap the sample storage tube to remove the samples, which is cumbersome and leaves a lot of sample residue inside the sample storage tube, making it inconvenient for staff to clean the inside of the sample storage tube later. Utility Model Content

[0005] This utility model discloses a VOCs sampling device for pollution sources, which solves the problem that when the sample adheres tightly inside the sample storage cylinder, it is inconvenient for staff to remove the sample.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A VOCs sampling device for pollution sources includes a positioning component with a positioning bolt fixed on it. A sampling cylinder is provided inside the positioning component, and a storage cylinder is placed inside the sampling cylinder. A column with a sliding connection passes through the top of the storage cylinder. A push plate located inside the storage cylinder is fixed at the bottom of the column. A through hole is provided at the top of the sampling cylinder for the column to pass through. A connecting frame is fixed at the top of the sampling cylinder, and a screw rod connected to the column is threaded on the connecting frame. A push rod for driving the connecting frame to rise and fall is provided on the positioning component.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] After placing the positioning component in the designated position, insert the sample storage cylinder into the sampling cylinder, ensuring the column passes through the perforation at the top of the sampling cylinder. Then, use a screw to connect the column to the connecting frame, allowing the push plate to fit against the top of the sampling cylinder. Next, drive the connecting frame with a push rod to move the sampling cylinder downwards and insert it into the soil to be sampled, allowing the soil to directly enter the sample storage cylinder. After sampling, restore the sampling cylinder to its original position and remove it from the sampling cylinder. Store the sample storage cylinder after removal. For subsequent sampling, when removing soil from the sample storage cylinder, the operator simply pushes the push plate towards the open end of the sample storage cylinder using the column, completely pushing the soil out of the cylinder. This invention facilitates the removal of soil samples from the sample storage cylinder, is simple and quick to operate, and does not leave a large amount of sample residue inside the sample storage cylinder. It also facilitates subsequent cleaning of the inside of the sample storage cylinder. Attached Figure Description

[0010] Figure 1 This is a front view of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional structural schematic diagram of the sampling tube of this utility model;

[0012] Figure 3 for Figure 1 A magnified structural diagram at point A;

[0013] Figure 4 for Figure 1 A magnified structural diagram at point B.

[0014] In the diagram: 1. Positioning component; 2. Sampling cylinder; 21. Cylinder body; 22. Sampling head; 23. Connecting ring; 24. Perforation; 25. Magnet; 26. Push rod; 3. Sample storage cylinder; 31. Push plate; 32. Column; 33. Circular plate; 4. Connecting frame; 41. Screw; 42. Magnet; 5. Push rod; 6. Connecting pipe; 7. Limiting plate; 71. Short plate; 72. Rotating rod; 73. Fixing plate; 74. Bolt; 8. Connecting plate. Detailed Implementation

[0015] The specific content of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a VOCs sampling device for pollution sources, including a positioning component 1, a positioning bolt fixed on the positioning component 1, a sampling cylinder 2 provided on the inner side of the positioning component 1, a storage cylinder 3 placed on the inner side of the sampling cylinder 2, a slidingly connected column 32 passing through the top of the storage cylinder 3, a push plate 31 located inside the storage cylinder 3 fixed at the bottom end of the column 32, a through hole 24 for the column 32 to pass through the top of the sampling cylinder 2, a connecting frame 4 fixed on the top of the sampling cylinder 2, a screw 41 threadedly connected to the column 32 on the connecting frame 4, and a push rod 5 for driving the connecting frame 4 to rise and fall on the positioning component 1. Place the positioning component 1 in the designated position, insert the positioning bolt into the soil, and fix the positioning component 1. Then, place the sample storage cylinder 3 into the sampling cylinder 2, and after the column 32 passes through the perforation 24, use the screw 41 to fix the column 32 to the connecting frame 4. After the worker uses the push rod 5 to push the connecting frame 4 downward, the connecting frame 4 can drive the sampling cylinder 2 downward. After the sampling cylinder 2 is inserted into the soil to be sampled, the soil directly enters the sample storage cylinder 3. After the soil sampling operation is completed, push rod 5 drives the connecting frame 4 upward, so that the sampling cylinder 2 and the sample storage cylinder 3 return to their original positions. Then, remove the screw 41. Separate the column 32 from the connecting frame 4, and then remove the sample storage cylinder 3 from the sampling cylinder 2. At the same time, the staff uses an external sealing cap (the sealing cap in the prior art document mentioned in the background art is sufficient) to seal the open end of the sample storage cylinder 3, thus completing the sealed storage of the soil. After the sample storage cylinder 3 is transferred to the testing room, the staff can remove the external sealing cap and then push the push plate 31 through the column 32 to move it. Moving the push plate 31 will completely eject the soil sample from the sample storage cylinder 3. The outer ring surface of the push plate 31 fits against the inner wall of the sample storage cylinder 3, which can completely push out the soil sample from the sample storage cylinder 3.

[0017] like Figure 1 , Figure 3 and Figure 4As shown, a connecting pipe 6 is fixedly connected through the positioning component 1, and a push rod 5 is slidably connected inside the connecting pipe 6. A limiting plate 7 is fixed at the bottom of the push rod 5 and contacts the bottom of the connecting pipe 6. Two short plates 71 that are symmetrically arranged are fixed at the bottom of the limiting plate 7. A rotating rod 72 that passes through the two short plates 71 and is rotatably connected to the short plates 71 is provided at the bottom of the limiting plate 7. A fixing plate 73 is fixed on the limiting plate 7. A bolt 74 is threadedly connected to the fixing plate 73. A set of screw holes that are arranged in a ring array and are adapted to the bolt 74 are opened at one end of the rotating rod 72 near the fixing plate 73. A connecting plate 8 that is connected to the rotating rod 72 is fixed on the connecting frame 4. After the sample storage cylinder 3 is inserted into the soil along with the sampling cylinder 2 for sampling and reset, the staff can turn the bolt 74 to separate the bolt 74 from one of the screw holes on the rotating rod 72, rotate the connecting frame 4 by 90°, and then thread the bolt 74 into the corresponding screw hole on the other rotating rod 72 to complete the fixation of the rotating rod 72. Then, after the staff separates the column 32 from the screw rod 41, they can push the column 32 to move the sample storage cylinder 3 outside the sampling cylinder 2. Then, the column 32 passes through the through hole 24 and moves outside the sampling cylinder 2. The way the sample storage cylinder 3 is taken out from the sampling cylinder 2 in a horizontal state can prevent the soil sample in the sample storage cylinder 3 from falling out when the sample storage cylinder 3 is separated from the sampling cylinder 2, and it is also convenient for the staff to place another sample storage cylinder 3 into the sampling cylinder 2 later.

[0018] like Figure 2 As shown, the sampling cylinder 2 is embedded with a magnet 25 that contacts the outer wall of the sample storage cylinder 3, and the sample storage cylinder 3 is made of steel. When the sample storage cylinder 3 is placed inside the sampling cylinder 2 and comes into contact with the magnet 25, it can be attracted and held in place, increasing the stability of the sample storage cylinder 3 and making it easier for the operator to connect the screw 41 to the column 32.

[0019] like Figure 1 and Figure 2 As shown, the sampling cylinder 2 includes a cylinder body 21. The bottom of the cylinder body 21 has an annular threaded groove, and the bottom of the cylinder body 21 has an annular sampling head 22. A connecting ring 23, threadedly connected within the threaded groove, is fixed to the top of the sampling head 22. Because hard stones may exist in the soil, if stones damage or chip the sharp parts of the sampling head 22, workers can separate the connecting ring 23 from the cylinder body 21 and replace it with a new sampling head 22. This eliminates the need to replace the entire sampling cylinder 2, saving costs, and the replacement process is simple and quick.

[0020] like Figure 1 , Figure 2 and Figure 3As shown, a sliding push rod 26 is slidably connected to the top of the sampling cylinder 2. A magnetic block 42 is fixed on the inner wall of the connecting frame 4, which contacts the top of the push rod 26. The top of the push rod 26 is made of steel. The bottom of the push rod 26 contacts the top of the sample storage cylinder 3. After the sample storage cylinder 3 has finished sampling and been reset, the staff can use the push rod 26 to push the sample storage cylinder 3 to move it outside the sampling cylinder 2, making it easy for the staff to remove the sample storage cylinder 3. When the push rod 26 is not needed, the top of the push rod 26 can be made to contact the magnetic block 42, so that the magnetic block 42 can attract the push rod 26. The part of the push rod 26 that contacts the magnetic block 42 can be made of steel, while other parts can be made of lighter plastic or other materials.

[0021] like Figure 1 As shown, a circular plate 33 is fixed to the top of the column 32, and the circular plate 33 has a threaded hole that matches the screw 41. The screw 41 can be connected to the threaded hole on the circular plate 33 to complete the fixation of the column 32.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pollution source VOCs sampling device comprising a positioning member (1) on which a positioning bolt is fixed, characterized in that: The inner side of the positioning piece (1) is provided with a sampling cylinder (2), the inner side of the sampling cylinder (2) is placed with a sample storage cylinder (3), the top of the sample storage cylinder (3) penetrates a slidingly connected stand column (32), the bottom end of the stand column (32) is fixed with a push plate (31) located in the sample storage cylinder (3), and the top of the sampling cylinder (2) is provided with a through hole (24) for the stand column (32) to pass through; the top of the sampling cylinder (2) is fixed with a connecting frame (4), the connecting frame (4) is threadedly connected with a screw rod (41) connected with the stand column (32), and the positioning piece (1) is provided with a push rod (5) for driving the connecting frame (4) to ascend and descend.

2. The device of claim 1, wherein: The positioning piece (1) penetrates a fixedly connected connecting pipe (6), the push rod (5) is slidingly connected in the connecting pipe (6), and the bottom end of the push rod (5) is fixed with a limiting plate (7) in contact with the bottom of the connecting pipe (6); the bottom of the limiting plate (7) is fixed with two left and right symmetrical short plates (71), the bottom of the limiting plate (7) is provided with a rotating rod (72) penetrating the two short plates (71) and being rotatably connected with the short plates (71), and the limiting plate (7) is fixed with a fixed plate (73), the fixed plate (73) is threadedly connected with a bolt (74), and the end of the rotating rod (72) close to the fixed plate (73) is provided with a group of annularly arrayed screw holes matched with the bolt (74); the connecting frame (4) is fixed with a connecting plate (8) connected with the rotating rod (72).

3. The device of claim 1, wherein: The sampling cylinder (2) is embedded with a magnetite (25) in contact with the outer wall of the sample storage cylinder (3), and the sample storage cylinder (3) is made of steel.

4. The device of claim 1, wherein: The sampling cylinder (2) comprises a cylinder body (21), the bottom of the cylinder body (21) is provided with an annular threaded groove, and the bottom of the cylinder body (21) is provided with an annular sampling head (22); the top of the sampling head (22) is fixed with a threaded groove in the threaded groove.

5. The device of claim 1, wherein: The top of the sampling cylinder (2) penetrates a slidingly connected push rod (26), the inner wall of the connecting frame (4) is fixed with a magnet block (42) in contact with the top of the push rod (26), and the top end of the push rod (26) is made of steel.

6. The device of claim 1, wherein: The top of the stand column (32) is fixed with a circular plate (33), and the circular plate (33) is provided with a threaded hole matched with the screw rod (41).

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