Sampling device for detecting perfluorinated compounds in underground water for refuse landfill

Abstract

The utility model provides a sampling device for groundwater perfluorinated compound detection for refuse landfill, and relates to the technical field of groundwater perfluorinated compound detection, the sampling device comprises a main rod, a plurality of groups of sampling components are arranged in one side of the main rod, the plurality of groups of sampling components comprise a one-way screw rod, the top of the one-way screw rod is connected with a rotating handle, and the rotating handle is connected with the other side of the main rod. A bearing is connected to the bottom of the one-way screw rod, three groups of sampling boxes are arranged on the front surface, close to the one-way screw rod, of the main rod at equal intervals, a sliding groove is formed in the front surface of each group of sampling box, and a sliding plate is arranged in each sliding groove. According to the utility model, when underground water is sampled, the main rod can be inserted into a water source, so that the water source enters the three groups of sampling boxes, and then the sampling boxes are sealed by rotating the one-way screw rod, so that three groups of underground water with different depths can be collected at one time, and the vertical distribution characteristics of perfluorinated compounds in the underground water can be comprehensively reflected; therefore, the representativeness and the accuracy of the data are improved.

Description

Technical Field

[0001] This utility model relates to the field of groundwater perfluorinated compound detection technology, and in particular to a sampling device for detecting perfluorinated compounds in groundwater used in landfills. Background Technology

[0002] The detection of perfluorinated compounds in groundwater used in landfills is a complex and important process that requires strict adherence to relevant standards and operating procedures to ensure the accuracy and reliability of the test results. Before the test can be conducted, groundwater samples must be collected using a sampling device.

[0003] In the prior art, such as Chinese Patent Publication No. CN211347522U, a groundwater sampler is disclosed, comprising: a sampling tube, including a sampling tube body with a tube opening at the top and a sampling tube cap disposed on the tube opening; a sampling bottle, located inside the sampling tube body and mounted on the sampling tube cap; and a sampling bottle mounting tube, having a shape matching the bottle opening of the sampling bottle, for mounting the sampling bottle on the sampling tube cap, wherein the sampling tube cap has a cap body matching the tube opening and a cap top disposed on the top of the cap body and having a cavity, the upper end of the sampling bottle mounting tube is connected to the bottom of the cap body, the bottle opening of the sampling bottle is connected to the lower end of the sampling bottle mounting tube, a water inlet pipe is inserted at the center of the cap body, the upper end of the water inlet pipe extends upward from the top of the cap body and into the cavity of the cap top, the lower end extends downward from the bottom of the cap body and into the sampling bottle, a water inlet is provided on the cap top, and an overflow outlet is provided on the sampling bottle mounting tube.

[0004] The above-mentioned technical solutions can achieve groundwater sampling. However, existing groundwater sampling devices have a significant limitation in the detection of perfluorinated compounds in landfills: they can only sample groundwater at a single depth each time, and cannot collect water samples from different depths simultaneously. This makes it impossible to fully reflect the vertical distribution characteristics of perfluorinated compounds in groundwater, thus affecting the representativeness and accuracy of the data. Therefore, we propose a new sampling device for detecting perfluorinated compounds in groundwater in landfills. Utility Model Content

[0005] The purpose of this invention is to address the significant limitation of existing groundwater sampling devices in detecting perfluorinated compounds in landfills. These devices can only sample groundwater at a single depth at a time, and cannot collect water samples from different depths simultaneously. This makes it impossible to comprehensively reflect the vertical distribution characteristics of perfluorinated compounds in groundwater, thus affecting the representativeness and accuracy of the data. Therefore, this invention proposes a sampling device for detecting perfluorinated compounds in groundwater in landfills.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sampling device for detecting perfluorinated compounds in groundwater in landfills, comprising a main rod, wherein multiple sampling components are arranged inside one side of the main rod, the multiple sampling components including a one-way screw, a handle connected to the top of the one-way screw, a bearing connected to the bottom of the one-way screw, and three sampling boxes equidistantly arranged on the front surface of the main rod near the one-way screw, each sampling box having a groove on its front surface, a sliding plate arranged inside the groove, a connecting block connected to the top of the sliding plate, and a threaded hole through the interior of the connecting block.

[0007] Furthermore, a sealing ring is provided on the inner wall of the slide groove, and the inner wall of the slide groove is in contact with the outer surface of the slide plate.

[0008] Furthermore, the slide plate and the slide groove form a sliding connection, and the connecting block is L-shaped.

[0009] Furthermore, the one-way screw and the bearing form a rotatable connection, and the one-way screw and the connecting block form a threaded connection through a threaded hole.

[0010] Furthermore, a filter assembly is connected to one outer surface of each sampling box, the filter assembly including a water outlet, and a limit block is provided inside the water outlet.

[0011] Furthermore, a filter screen is attached to the front surface of the limiting block, and a threaded cap is threadedly connected to the outer surface of the water outlet.

[0012] Furthermore, bolts are inserted into both the upper and lower ends of the water outlet near the filter screen, and threaded grooves are provided at both the upper and lower ends of the filter screen.

[0013] Furthermore, the position and size of the bolt match the position and size of the threaded groove, and the bolt, after passing through the outlet, forms a threaded connection with the threaded groove.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this utility model, when sampling groundwater, the main rod can be inserted into the water source, allowing the water source to enter the three sets of sampling boxes. Then, the sampling boxes are sealed by rotating the one-way screw. In this way, three sets of groundwater at different depths can be collected at one time, which can comprehensively reflect the vertical distribution characteristics of perfluorinated compounds in groundwater, thereby improving the representativeness and accuracy of the data.

[0016] 2. In this utility model, after the groundwater is collected, the screw cap can be opened to release the water source in the sampling box for testing. At the same time as releasing the water source, impurities can also be filtered to avoid impurities affecting the accuracy of water sample testing and the service life of the instrument. Attached Figure Description

[0017] Figure 1 A perspective view of a sampling device for detecting perfluorinated compounds in groundwater used in landfills is provided for this utility model.

[0018] Figure 2 This utility model provides an exploded structural diagram of a sampling device for detecting perfluorinated compounds in groundwater used in landfills;

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This invention provides a schematic diagram of the exploded structure of the outlet of a sampling device for detecting perfluorinated compounds in groundwater used in landfills.

[0021] Legend: 1. Main rod; 2. Handle; 3. Multiple sampling components; 301. One-way screw; 302. Rotary handle; 303. Bearing; 304. Slide groove; 305. Slide plate; 306. Connecting block; 307. Threaded hole; 308. Sampling box; 4. Filter assembly; 401. Outlet; 402. Limiting block; 403. Filter screen; 404. Threaded groove; 405. Bolt; 406. Threaded cap. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example 1, as Figure 1 - Figure 3As shown, this utility model provides a sampling device for detecting perfluorinated compounds in groundwater in landfills, including a main rod 1. Multiple sampling components 3 are arranged inside one side of the main rod 1. Each sampling component 3 includes a one-way screw 301, with a handle 302 connected to the top of the one-way screw 301 and a bearing 303 connected to the bottom. Three sampling boxes 308 are equidistantly arranged on the front surface of the main rod 1 near the one-way screw 301. Each sampling box 308 has a groove 304 on its front surface. The part is provided with a sliding plate 305, and a connecting block 306 is connected to the top of the sliding plate 305. A threaded hole 307 is opened through the inside of the connecting block 306. A sealing ring is provided on the inner wall of the slide groove 304. The inner wall of the slide groove 304 is in contact with the outer surface of the sliding plate 305. The sliding plate 305 and the slide groove 304 form a sliding connection. The connecting block 306 is L-shaped. A one-way screw 301 and a bearing 303 form a rotating connection. The one-way screw 301 is threadedly connected to the connecting block 306 through the threaded hole 307.

[0025] The overall effect of Embodiment 1 is that when sampling groundwater, the main rod 1 can be inserted into the water source by grasping the handle 2, allowing the water source to enter the three sampling boxes 308. Then, the handle 302 is rotated forward to drive the one-way screw 301 to rotate forward. At the same time, the one-way screw 301 rotates forward and simultaneously rotates with the three connecting blocks 306 through the threaded hole 307. This causes the three connecting blocks 306 to push the sliding plate 305 downward, allowing the sliding plate 305 to move within the sliding groove 304. The sampling box 308 is sealed by sliding the main rod 1 out of the water source, and the water in the sampling box 308 is taken out for perfluorinated compound detection. When the handle 302 is turned in the opposite direction, the sliding plate 305 will slide upward in the slide groove 304 through the screw rotation, so that the sampling box 308 is in the open state for easy use next time. In this way, three sets of groundwater at different depths can be collected at one time, which can comprehensively reflect the vertical distribution characteristics of perfluorinated compounds in groundwater, thereby improving the representativeness and accuracy of the data.

[0026] Example 2, as Figure 1 and Figure 4As shown, the difference between this embodiment and embodiment 1 is that a filter assembly 4 is connected to one outer surface of each sampling box 308. The filter assembly 4 includes an outlet 401. A limiting block 402 is provided inside the outlet 401. A filter screen 403 is attached to the front surface of the limiting block 402. A threaded cap 406 is threadedly connected to the outer surface of the outlet 401. Bolts 405 are inserted into the upper and lower ends of the outlet 401 near the filter screen 403. Threaded grooves 404 are opened at the upper and lower ends of the filter screen 403. The position and size of the bolts 405 match the position and size of the threaded grooves 404. After the bolts 405 pass through the outlet 401, they form a threaded connection with the threaded grooves 404.

[0027] The effect achieved by the entire embodiment 2 is that after sampling, the threaded cover 406 can be removed, allowing the sample water in the sampling box 308 to flow out through the outlet 401. The filter screen 403 in the outlet 401 can filter impurities in the water. When it is necessary to clean the impurities on the surface of the filter screen 403 after long-term use, all the upper and lower bolts 405 can be removed, and then the filter screen 403 can be taken out for cleaning. After that, the cleaned filter screen 403 is pushed into the outlet 401 and limited by the limiting block 402. The bolts 405 are then threaded through the outlet 401 and fixed with the threaded groove 404.

[0028] Working principle: When sampling groundwater, the main rod 1 can be inserted into the water source, allowing the water to enter the three sampling boxes 308. Then, the sampling boxes 308 are sealed by rotating the one-way screw 301. This allows for the simultaneous collection of groundwater samples from three different depths, comprehensively reflecting the vertical distribution characteristics of perfluorinated compounds in the groundwater, thereby improving the representativeness and accuracy of the data. After the groundwater is collected, the threaded cover 406 can be opened to release the water from the sampling boxes 308 for testing. Releasing the water also filters impurities, preventing unfiltered impurities from affecting the accuracy of water sample testing and the lifespan of the instrument.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A sampling device for detecting perfluorinated compounds in groundwater at landfills, comprising a main rod (1), characterized in that: Multiple sampling components (3) are arranged inside one side of the main rod (1); The multiple sampling components (3) include a one-way screw (301), a handle (302) is connected to the top of the one-way screw (301), a bearing (303) is connected to the bottom of the one-way screw (301), and three sampling boxes (308) are equidistantly arranged on the front surface of the main rod (1) near the one-way screw (301). Each sampling box (308) has a groove (304) on its front surface. A sliding plate (305) is arranged inside the groove (304), and a connecting block (306) is connected to the top of the sliding plate (305). A threaded hole (307) is opened through the inside of the connecting block (306).

2. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 1, characterized in that: The inner wall of the slide groove (304) is provided with a sealing ring, and the inner wall of the slide groove (304) is in contact with the outer surface of the slide plate (305).

3. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 2, characterized in that: The sliding plate (305) and the sliding groove (304) form a sliding connection, and the connecting block (306) is L-shaped.

4. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 3, characterized in that: The one-way screw (301) and the bearing (303) are rotatably connected, and the one-way screw (301) is threadedly connected to the connecting block (306) through the threaded hole (307).

5. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 1, characterized in that: Each of the sampling boxes (308) has a filter assembly (4) connected to one side of its outer surface. The filter assembly (4) includes a water outlet (401) and a limit block (402) is provided inside the water outlet (401).

6. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 5, characterized in that: The front surface of the limiting block (402) is fitted with a filter screen (403), and the outer surface of the water outlet (401) is threadedly connected with a threaded cap (406).

7. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 6, characterized in that: Bolts (405) are inserted into the upper and lower ends of the outlet (401) near the filter screen (403), and threaded grooves (404) are opened at the upper and lower ends of the filter screen (403).

8. The sampling device for detecting perfluorinated compounds in groundwater in landfills according to claim 7, characterized in that: The position and size of the bolt (405) match the position and size of the threaded groove (404), and the bolt (405) forms a threaded connection with the threaded groove (404) after passing through the outlet (401).

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