A groundwater pollution sampling device and method

Abstract

This invention belongs to the field of water pollution sampling technology, specifically relating to a groundwater pollution sampling device and method. It includes a first water pipe, comprising a straight pipe and a folded corrugated pipe fixedly connected to one end of the straight pipe. One end of the folded corrugated pipe is fixedly connected to the top of a water pump. The outlet of the water pump is located inside the folded corrugated pipe. A second water pipe is fixedly connected to the middle of the top of the water pump, and multiple water passages are evenly distributed on the lower side wall of the second water pipe. This invention not only prevents water from contaminating the inner wall of the water pipe and the water pump during the pump's descent, avoiding subsequent detection errors in the sampled water, but also allows for independent well-washing and sampling pipelines, further minimizing detection errors in the sampled water, thus comprehensively ensuring the accuracy of the water data. Furthermore, this invention enables rapid and successful water-blocking operations and improves well-washing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of water pollution sampling technology, specifically relating to a groundwater pollution sampling device and method. Background Technology

[0002] Groundwater sampling equipment is a tool used to extract water samples from groundwater sources, typically for purposes such as environmental monitoring, water quality testing, and pollution assessment. These devices are sophisticatedly designed to ensure safe and accurate water sample collection at varying depths and under different conditions. Through these devices, samples can be obtained for analyzing groundwater quality, composition, and pollution levels.

[0003] Chinese Patent Application No. 202510845848.2 discloses a groundwater sampling device. Addressing the technical problem that in existing manual groundwater sampling, where groundwater is completely exposed to the air, the water sample is easily contaminated by the environment or wind, leading to inaccurate results, the patent proposes the following solution, which includes a sampling section, a sample storage section, and a control section. This patent obtains a sample by directly sampling within a tube and storing the collected water sample directly in the tube, thus avoiding accidental secondary contamination of the water sample during manual operation and ensuring the accuracy of the sample detection parameters.

[0004] When sampling groundwater, a well-washing operation is usually performed first to pump out the existing water in the monitoring well before sampling. This avoids errors in water quality detection caused by the remaining water in the monitoring well. If the same set of equipment is used, the existing water will contaminate the equipment pipelines. If two sets of equipment are used, the operation becomes complicated. At the same time, since the water above the designated location will fall and be pumped out simultaneously during pumping, well washing requires a lot of time to completely avoid cross-contamination of the water. Furthermore, although some existing airbag-type packing devices can improve well washing efficiency, the packing process is cumbersome and it is not possible to quickly determine whether the packing is successful. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a groundwater pollution sampling device and method. Through the cooperation of a first water pipe, a second water pipe, an opening and closing mechanism, and a water pump, this invention ensures that water at different heights during the pump's descent does not contaminate the inner wall of the water pipes or the pump, avoiding subsequent testing errors. Simultaneously, it allows for the separation of the well-washing pipeline and the sampling pipeline, further minimizing testing errors and comprehensively guaranteeing the accuracy of the tested water data. Furthermore, the invention's telescopic water-blocking mechanism, in conjunction with the first and second water pipes, not only ensures the accuracy of the tested water data but also enables rapid and successful water-blocking operations, improving well-washing efficiency. Finally, the structural design of the support frame allows for both opening and closing control of the inlet and provides blocking and buffering functions, effectively protecting the water pump from damage and further enhancing testing accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A groundwater pollution sampling device includes a first water pipe, which comprises a straight pipe and a folded corrugated pipe fixedly connected to one end of the straight pipe. One end of the folded corrugated pipe is fixedly connected to the top of a water pump. The outlet of the water pump is located inside the folded corrugated pipe. A second water pipe is fixedly connected to the middle of the top of the water pump. Multiple water passage holes are evenly distributed on the lower side wall of the second water pipe. A rubber plug is sealed and inserted into the top of the second water pipe, and a limiting ring is fixedly provided on the top side wall of the second water pipe. A rubber cap is sealed and inserted into the upper end of the first water pipe. A through hole is opened in the middle of the rubber cap, and the second water pipe abuts against the inside of the through hole. The limiting ring is located above the rubber cap and is limited in position.

[0008] Furthermore, when washing the well, the rubber cap is opened and the rubber plug is closed; when sampling is performed, the rubber cap is closed and the rubber plug is opened.

[0009] Furthermore, the water pump has an inlet at the center of its bottom and an opening / closing mechanism at its bottom. The opening / closing mechanism includes multiple springs fixedly connected around the bottom of the water pump, and a lower baffle is fixedly connected to the bottom of the springs. A connector is fixedly provided at the center of the top of the lower baffle, and the connector is inserted into the inlet. The lower baffle is fixedly connected to the outer wall of the straight pipe through a support frame.

[0010] Furthermore, a first water passage groove is provided through the side wall of the water inlet, and a second water passage groove is provided through the side wall of the insertion pipe; when the limiting ring is positioned above the rubber cover and is limited, the folded corrugated pipe is in a compressed state, and the first water passage groove and the second water passage groove are misaligned and closed; when the limiting ring is released, the folded corrugated pipe extends, and the first water passage groove and the second water passage groove are connected.

[0011] Furthermore, a first connecting ring is fixedly connected to the outer wall of the straight pipe, and a telescopic water-blocking mechanism is fixedly provided on the outer side of the first connecting ring. The telescopic water-blocking mechanism includes a telescopic water-blocking membrane fixedly connected to the outer side of the first connecting ring, and an elastic rubber retaining ring is fixedly connected to the outer edge of the telescopic water-blocking membrane.

[0012] Furthermore, multiple adjusting rods are fixedly connected to the elastic rubber retaining ring, and multiple adjusting holes are opened on the side wall of the straight pipe. A sealing ring is installed on the adjusting hole, and the adjusting rod passes through the corresponding sealing ring. A second connecting ring is fixedly connected to the side wall of the second water pipe, and multiple hinge grooves are fixedly provided on the outer side of the second connecting ring. One end of the adjusting rod is hinged to the corresponding hinge groove.

[0013] Furthermore, the adjustment hole is located below the first connecting ring; when the second water pipe descends, the telescopic water-blocking membrane and the elastic rubber retaining ring open.

[0014] Furthermore, the support frame includes an upper retaining ring, the middle of which is fixedly connected to the outer wall of the straight tube; the bottom of the upper retaining ring is fixedly connected to the lower retaining plate through multiple retaining rods.

[0015] Furthermore, the water outlet is located between the second water pipe and the first water pipe.

[0016] This invention also claims a method for sampling using the aforementioned groundwater pollution sampling equipment, comprising the following steps:

[0017] S1. First, lower the water pump to the groundwater monitoring well. Once underwater, open the rubber cover and hold the first water pipe. As the water pump descends, the folded corrugated pipe extends, connecting the first and second water channels. Due to the synchronous descent of the second water pipe, the adjusting rod deflects, causing the telescopic water-blocking membrane and elastic rubber retaining ring to open. At this point, the elastic rubber retaining ring abuts against the groundwater monitoring well to provide a barrier.

[0018] S2. Start the water pump to flush the well. At this time, the water will be discharged from the opening of the first water pipe. After a period of time, close the rubber cover and open the rubber plug. Take a sample through the water pump. The water will be discharged from the opening of the second water pipe.

[0019] S3. Turn off the water pump, pull the second water pipe upward to reposition the limit ring, and then pull the first water pipe upward to recover the sampling equipment.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) This invention, through the cooperation of the first water pipe, the second water pipe, the opening and closing mechanism, and the water pump, can ensure that water at different heights does not contaminate the inner wall of the water pipe and the water pump during the descent of the water pump, thus avoiding subsequent detection errors of the sampled water. At the same time, it can also make the well-washing pipe and the sampling pipe independent, further avoiding detection errors of the sampled water, thereby comprehensively ensuring the accuracy of the detected water data. Specifically, the water pump is first lowered into the groundwater monitoring well. At this time, the inlet is closed, so the water at different heights does not contaminate the inner wall of the water pipe and the water pump during the descent of the water pump. After reaching the water, the rubber cover is opened and the first water pipe is held. At this time, the limiting ring is no longer limited by the rubber cover, and the water pump will descend due to gravity. Through the descent of the water pump, the folding The corrugated pipe extends; since the lower baffle is fixedly connected to the outer wall of the straight pipe through the support frame, the descent of the water pump will cause the inlet and the connector to move relative to each other. At this time, the first and second water channels of the lower baffle are connected; then the water pump is started to clean the well. Since the upper end of the second water pipe is sealed with a rubber plug, the water is discharged from the opening of the first water pipe, thus reducing the probability of contamination of the inner wall of the second water pipe by the water pumped out during well cleaning; after a period of time, the rubber cover is closed and the rubber plug is opened, and the water pump is used to take samples. Due to the structural design of the water passage, the water is discharged from the opening of the second water pipe, thus making the well cleaning pipe and the sampling pipe independent, further avoiding the detection error of the sampled water, thereby comprehensively ensuring the accuracy of the water data.

[0022] (2) This invention, through the cooperation of the telescopic water-blocking mechanism with the first and second water pipes, can not only ensure the accuracy of the water body data, but also quickly and successfully carry out the water-blocking operation and improve the well-washing efficiency. Specifically, when the second water pipe descends to open the outlet, it can prevent water bodies at different heights from contaminating the inner wall of the water pipe and the water pump during the descent process. Furthermore, due to the synchronous descent of the second water pipe, the adjusting rod deflects, realizing the opening of the telescopic water-blocking membrane and the elastic rubber retaining ring. At this time, the elastic rubber retaining ring abuts against the groundwater monitoring well to block it. When the well-washing and pumping operation is carried out at this time, the water body above the telescopic water-blocking membrane will be blocked, thereby allowing the groundwater of the water layer to be detected to flow quickly into the pumped area, thus rapidly improving the well-washing efficiency. At the same time, since the second water pipe only needs to be released to descend to block it, if the blockage is successful, the first water pipe will not descend due to the abutment of the elastic rubber retaining ring. If the blockage is unsuccessful, the first water pipe will descend when it is released, thus quickly determining whether the water blocking is successful.

[0023] (3) Through the structural design of the support frame, the present invention can not only realize the opening and closing control of the water inlet, but also realize the blocking and buffering function, effectively protecting the water pump from damage, and further improving the detection accuracy. Specifically, since the bottom of the upper baffle ring is fixedly connected to the lower baffle plate through multiple baffle rods, and the middle of the upper baffle ring is fixedly connected to the outer wall of the straight pipe, the lower baffle plate will not descend when the water pump descends, so that the water inlet and the plug pipe move relative to each other to realize the switching of opening and closing. At the same time, the baffle rods not only play a fixing role, but also work with the lower baffle plate and the upper baffle ring to effectively block large impurities, prevent the water pump from being stuck, and thus effectively protect the water pump from damage. In addition, due to the cooperation of the upper folded corrugated pipe and the lower spring, the water pump also has a certain buffering performance, avoiding damage caused by impact and vibration during use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a groundwater pollution sampling device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of a groundwater pollution sampling device according to the present invention;

[0026] Figure 3 This is a schematic diagram of the dispersed structure of a groundwater pollution sampling device according to the present invention;

[0027] Figure 4 This is a schematic diagram of a partial dispersed structure of a groundwater pollution sampling device according to the present invention;

[0028] Figure 5 This is a schematic diagram of the second water pipe dispersion structure of a groundwater pollution sampling device according to the present invention;

[0029] Figure 6 This is a schematic diagram of the support frame and the decentralized structure of the opening and closing mechanism of a groundwater pollution sampling device according to the present invention.

[0030] Figure 7 This is a schematic diagram of a partial cross-sectional structure of the opening and closing mechanism of a groundwater pollution sampling device according to the present invention;

[0031] Figure 8 This is a schematic diagram of the sampling process of a groundwater pollution sampling device according to the present invention.

[0032] The attached figures are labeled as follows:

[0033] First water pipe-100, straight pipe-110, folded corrugated pipe-120, adjusting hole-130, rubber cover-140, through hole-141, first connecting ring-150, water pump-200, water outlet-210, water inlet-220, first water channel-221, telescopic water blocking mechanism-300, elastic rubber retaining ring-310, telescopic water blocking membrane-320, adjusting rod-330, second water pipe-400, water channel-410, rubber plug-420, limiting ring-430, second connecting ring-440, hinge groove-441, opening and closing mechanism-500, lower baffle-510, insertion pipe-520, second water channel-521, spring-530, support frame-600, upper retaining ring-610, baffle rod-620. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0036] Example

[0037] like Figures 1-8 As shown, a groundwater pollution sampling device includes a first water pipe 100, which includes a straight pipe 110 and a folded corrugated pipe 120 fixedly connected to one end of the straight pipe 110. One end of the folded corrugated pipe 120 is fixedly connected to the top of a water pump 200. The outlet 210 of the water pump 200 is located inside the folded corrugated pipe 120. A second water pipe 400 is fixedly connected to the middle of the top of the water pump 200, and the lower sidewall of the second water pipe 400 is evenly provided with... Multiple water passage holes 410; a rubber plug 420 is sealed and inserted into the top of the second water pipe 400, and a limiting ring 430 is fixedly provided on the top side wall of the second water pipe 400; a rubber cover 140 is sealed and inserted into the upper end of the first water pipe 100, and a through hole 141 is opened in the middle of the rubber cover 140, and the second water pipe 400 abuts against the inside of the through hole 141; the limiting ring 430 is located above the rubber cover 140 and is limited; the bottom of the water pump 200 is provided with an opening and closing mechanism 500.

[0038] This invention, through the cooperation of the first water pipe 100, the second water pipe 400, the opening and closing mechanism 500, and the water pump 200, ensures that water at different heights does not contaminate the inner wall of the water pipe and the water pump 200 during the descent of the water pump 200, thus avoiding subsequent detection errors of the sampled water. At the same time, it also allows the well-washing pipe and the sampling pipe to be independent, further avoiding detection errors of the sampled water, thereby comprehensively ensuring the accuracy of the detected water data.

[0039] It is worth noting that the water pump 200 of the present invention can be controlled by wires or remotely controlled by its own internal power supply.

[0040] Furthermore, when washing the well, the rubber cap 140 is opened and the rubber plug 420 is closed; when sampling is performed, the rubber cap 140 is closed and the rubber plug 420 is opened.

[0041] Furthermore, the water pump 200 has an inlet 220 at the bottom center, and the opening and closing mechanism 500 includes multiple springs 530 fixedly connected around the bottom of the water pump 200. The bottom of the springs 530 is fixedly connected to a lower baffle 510. A plug pipe 520 is fixedly provided at the top center of the lower baffle 510, and the plug pipe 520 is plugged into the inlet 220. The lower baffle 510 is fixedly connected to the outer wall of the straight pipe 110 through a support frame 600.

[0042] Furthermore, a first water passage groove 221 is provided through the side wall of the water inlet 220, and a second water passage groove 521 is provided through the side wall of the insertion pipe 520; when the limiting ring 430 is limited above the rubber cover 140, the folded corrugated pipe 120 is in a compressed state, and the first water passage groove 221 and the second water passage groove 521 are misaligned and closed; when the limiting ring 430 is released, the folded corrugated pipe 120 extends, and the first water passage groove 221 and the second water passage groove 521 are connected.

[0043] The invention first lowers the water pump 200 into the groundwater monitoring well. At this time, the inlet 220 is sealed by the connector 520, thus preventing water from contaminating the inner wall of the water pipe and the water pump 200 at different heights during the descent. After reaching the underwater level, the rubber cover 140 is opened and the first water pipe 100 is held. At this time, the limiting ring 430 is no longer limited by the rubber cover 140, and the water pump 200 will descend due to gravity. The descent of the water pump 200 causes the folded corrugated pipe 120 to extend. Since the lower baffle 510 is fixedly connected to the outer wall of the straight pipe 110 through the support frame 600, the descent of the water pump 200 will cause relative movement between the inlet 220 and the connector 520. At this time, the first water channel 221 and the second water channel 521 are connected; then the water pump 200 is started to clean the well. Since the upper end of the second water pipe 400 is sealed by the rubber plug 420, the water is discharged from the opening of the first water pipe 100, thereby reducing the probability of the water pumped out of the well contaminating the inner wall of the second water pipe 400; after a period of time, the rubber cover 140 is closed and the rubber plug 420 is opened, and the water pump is used to take a sample. Due to the structural design of the water passage 410, the water is discharged from the opening of the second water pipe 400, thereby making the well cleaning pipe and the sampling pipe independent, further avoiding the detection error of the sampled water, and thus comprehensively ensuring the accuracy of the detected water data.

[0044] Furthermore, a first connecting ring 150 is fixedly connected to the outer wall of the straight pipe 110, and a telescopic water-blocking mechanism 300 is fixedly provided on the outer side of the first connecting ring 150. The telescopic water-blocking mechanism 300 includes a telescopic water-blocking membrane 320 fixedly connected to the outer side of the first connecting ring 150, and an elastic rubber retaining ring 310 is fixedly connected to the outer edge of the telescopic water-blocking membrane 320.

[0045] The present invention, through the cooperation of the telescopic water-blocking mechanism 300 with the first water pipe 100 and the second water pipe 400, can not only ensure the accuracy of the water body detection data, but also quickly and successfully carry out the water-blocking operation and improve the well washing efficiency.

[0046] It should be noted that the accompanying drawings of this invention are only schematic diagrams. The lengths of the first water pipe 100 and the second water pipe 400 in the drawings do not represent their specific lengths. The water pipe above the first connecting ring 150 has been shortened.

[0047] Furthermore, multiple adjusting rods 330 are fixedly connected to the elastic rubber retaining ring 310, and multiple adjusting holes 130 are opened on the side wall of the straight pipe 110. A sealing ring is installed on the adjusting hole 130, and the adjusting rod 330 passes through the corresponding sealing ring. A second connecting ring 440 is fixedly connected to the side wall of the second water pipe 400, and multiple hinge grooves 441 are fixedly provided on the outer side of the second connecting ring 440. One end of the adjusting rod 330 is hinged to the corresponding hinge groove 441.

[0048] When the second water pipe 400 descends to open the outlet 210, this invention ensures that water at different heights does not contaminate the inner wall of the water pipe or the water pump 200 during the descent. Furthermore, the synchronous descent of the second water pipe 400 causes the adjusting rod 330 to deflect, opening the telescopic water-blocking membrane 320 and the elastic rubber retaining ring 310. At this time, the elastic rubber retaining ring 310 abuts against the groundwater monitoring well to block it. When the well is flushed and pumped, the water above the telescopic water-blocking membrane 320 is blocked, allowing groundwater from the water layer to be tested to quickly flow into the pumped area, thus rapidly improving the well flushing efficiency. Simultaneously, since the blocking only requires releasing the second water pipe 400 to descend, if the blocking is successful, releasing the first water pipe 100 will prevent it from descending due to the abutment of the elastic rubber retaining ring 310. If the blocking is unsuccessful, releasing the first water pipe 100 will cause it to descend, thus quickly determining whether the water blocking was successful.

[0049] It is worth noting that the telescopic water-blocking membrane 320 and the elastic rubber retaining ring 310 are telescopic and can be made of conventional materials. At the same time, it is not necessary to ensure that the telescopic water-blocking membrane 320 is completely sealed to completely isolate the water body. It is sufficient to ensure the detection accuracy as long as most of the water body is isolated.

[0050] Furthermore, the adjustment hole 130 is located below the first connecting ring 150; when the second water pipe 400 descends, the telescopic water-blocking membrane 320 and the elastic rubber retaining ring 310 open.

[0051] Furthermore, the support frame 600 includes an upper retaining ring 610, the middle of which is fixedly connected to the outer wall of the straight tube 110; the bottom of the upper retaining ring 610 is fixedly connected to the lower retaining plate 510 through multiple retaining rods 620.

[0052] This invention, through the structural design of the support frame 600, can not only control the opening and closing of the inlet 220, but also provide a blocking and buffering effect, effectively protecting the water pump 200 from damage and further improving detection accuracy. Specifically, since the bottom of the upper baffle ring 610 is fixedly connected to the lower baffle plate 510 via multiple baffle rods 620, and the middle of the upper baffle ring 610 is fixedly connected to the outer wall of the straight pipe 110, when the water pump 200 descends, the lower baffle plate 510 will not descend, preventing the inlet 220 from contacting the plug. The relative movement of the connecting pipe 520 enables the switching between opening and closing; at the same time, the baffle 620 not only serves a fixing function, but also works with the lower baffle 510 and the upper baffle ring 610 to effectively block large impurities, preventing the water pump 200 from getting stuck and thus effectively protecting the water pump 200 from damage, while further improving the detection accuracy; in addition, due to the cooperation of the upper folded bellows 120 and the lower spring 530, the water pump 200 also has a certain buffering performance, avoiding damage caused by impact and vibration during use.

[0053] Furthermore, the outlet 210 is located between the second water pipe 400 and the first water pipe 100.

[0054] A method for sampling groundwater pollution using the aforementioned sampling equipment includes the following steps:

[0055] S1. First, lower the water pump 200 into the groundwater monitoring well. Once underwater, open the rubber cover 140 and hold the first water pipe 100. As the water pump 200 descends, the folded corrugated pipe 120 extends, connecting the first water channel 221 with the second water channel 521. Due to the synchronous descent of the second water pipe 400, the adjusting rod 330 deflects, causing the telescopic water-blocking membrane 320 and the elastic rubber retaining ring 310 to open. At this time, the elastic rubber retaining ring 310 abuts against the groundwater monitoring well to provide a barrier.

[0056] S2. Start the water pump 200 to wash the well. At this time, the water is discharged from the pipe opening of the first water pipe 100. After a period of time, close the rubber cover 140 and open the rubber plug 420. Take a sample through the water pump 200. The water is discharged from the pipe opening of the second water pipe 400.

[0057] S3. Turn off the water pump 200, pull the second water pipe 400 upward to reposition the limit ring 430, and then pull the first water pipe 100 upward to recover the sampling equipment.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A groundwater pollution sampling apparatus, characterized by, The utility model provides a water pump, including first water pipe (100), first water pipe (100) includes straight pipe (110) and fixed communication in straight pipe (110) one end's folding bellows (120), folding bellows (120) one end with water pump (200) top fixed connection, water pump (200) water outlet (210) is located in folding bellows (120) inside, water pump (200) top middle fixed connection has second water pipe (400), second water pipe (400) lower end lateral wall evenly is provided with a plurality of water through -hole (410), second water pipe (400) top sealing plug has rubber plug (420), second water pipe (400) top lateral wall fixedly established and limited ring (430), first water pipe (100) upper end sealing plug has rubber cover (140), rubber cover (140) middle part is provided with through -hole (141), second water pipe (400) abuts in through -hole (141) inside, limited ring (430) is located in rubber cover (140) above is limited, water pump (200) bottom is equipped with open -close mechanism (500), When washing well, rubber cover (140) opens, rubber plug (420) closes, when sampling, rubber cover (140) closes, rubber plug (420) opens, Water pump (200) bottom middle is equipped with water inlet (220), open -close mechanism (500) includes a plurality of fixed connection in water pump (200) bottom around spring (530), spring (530) bottom common fixed connection has lower baffle (510), lower baffle (510) top middle fixedly established and inserted pipe (520) are inserted, inserted pipe (520) are inserted with water inlet (220), lower baffle (510) are fixedly connected with the outside lateral wall of straight pipe (110) through support frame (600), Water inlet (220) lateral wall is through and is provided with first water through -groove (221), inserted pipe (520) lateral wall is through and is provided with second water through -groove (521), when limited ring (430) is located in rubber cover (140) above is limited, folding bellows (120) is in compression state, first water through -groove (221) and second water through -groove (521) are closed in error, when limited ring (430) is relieved from the limitation, folding bellows (120) is elongated, first water through -groove (221) and second water through -groove (521) are communicated.

2. The groundwater pollution sampling device of claim 1, wherein The outer side wall of the straight pipe (110) is fixedly connected with the first connecting ring (150), the outer side of the first connecting ring (150) is fixedly provided with the telescopic water blocking mechanism (300), and the telescopic water blocking mechanism (300) comprises a telescopic water blocking film (320) fixedly connected to the outer side of the first connecting ring (150).

3. The groundwater pollution sampling apparatus of claim 2, wherein The elastic rubber check ring (310) is fixedly connected with a plurality of adjusting rods (330), the sidewall of the straight pipe (110) is provided with a plurality of adjusting holes (130), the adjusting holes (130) are provided with sealing rings, and the adjusting rods (330) pass through the corresponding sealing rings; the sidewall of the second water pipe (400) is fixedly connected with a second connecting ring (440), the outer side of the second connecting ring (440) is fixedly provided with a plurality of hinged grooves (441); one end of the adjusting rod (330) is hinged to the corresponding hinged groove (441).

4. The groundwater pollution sampling device of claim 3, wherein, The adjusting hole (130) is located below the first connecting ring (150); when the second water pipe (400) is lowered, the elastic rubber check ring (310) and the telescopic water blocking film (320) are opened.

5. The groundwater pollution sampling device of claim 1, wherein, The support frame (600) comprises an upper check ring (610), and the middle of the upper check ring (610) is fixedly connected with the outer sidewall of the straight pipe (110); the bottom of the upper check ring (610) is fixedly connected with the lower check disc (510) through a plurality of check rods (620).

6. The groundwater pollution sampling device of claim 1, wherein, The water outlet (210) is located between the second water pipe (400) and the first water pipe (100).

7. A method of sampling using the groundwater pollution sampling apparatus according to any one of claims 3 to 4, characterized by, The method comprises the following steps: S1, first, the water pump (200) is lowered into the underground water monitoring well, after reaching the underwater, the rubber cover (140) is opened and the first water pipe (100) is held, the folding bellows (120) is elongated by the lowering of the water pump (200), at this time, the first water channel (221) is communicated with the second water channel (521); due to the synchronous lowering of the second water pipe (400), the adjusting rod (330) is deflected, and the elastic rubber check ring (310) and the telescopic water blocking film (320) are opened; at this time, the elastic rubber check ring (310) abuts against the underground water monitoring well to block; S2, the water pump (200) is started to wash the well, at this time, the water is discharged from the pipe opening of the first water pipe (100); After a period of time, the rubber cover (140) is closed, and the rubber plug (420) is opened, the water pump (200) is used for sampling, and the water is discharged from the pipe opening of the second water pipe (400); S3, the water pump (200) is closed, the second water pipe (400) is pulled up, the limiting ring (430) is re-limited, and then the first water pipe (100) is pulled up to recover the sampling equipment.

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