A groundwater detection sampling device

Abstract

The application relates to the technical field of water body sampling, and discloses a groundwater detection sampling device, which comprises a main body, and a water level sensor is fixedly connected in the inside of the main body. When the piston disc one continues to slide, the groundwater in the peripheral area of the middle part of the sampling tube can be extracted through the water inlet pipe; when the piston disc one and the piston disc two sample the groundwater in the outer bottom part and the middle part area of the sampling tube respectively, the layered sampling of the groundwater outside the sampling tube can be completed, the limitation of single area sampling collection during sampling can be reduced, the sampling efficiency can be improved, and the continuity and accuracy during subsequent groundwater detection can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water sampling, in particular to a groundwater detection sampling device. BACKGROUND

[0002] The groundwater sampling device is a tool specially used for extracting groundwater samples, and is widely used in the fields of groundwater environmental monitoring, groundwater resource development and utilization, environmental pollution investigation, and hydrology research;

[0003] When detecting and sampling groundwater, the staff generally places the sampling pipe with a piston into the groundwater, pulls the piston up in the sampling pipe to make the water enter the sampling pipe, and then takes out the sampling pipe from the groundwater to detect the sampled water, thereby achieving the sampling purpose. Since the sampling pipe is long and the sampling port is at the bottom of the sampling pipe, when the groundwater in the sampling pipe is sampled, the groundwater can only enter the sampling pipe through the sampling port, and the sampled water is concentrated in the sampling port, which is not convenient for sampling the water in other areas, has low limitation, and also affects the sampling efficiency and the continuity and accuracy of subsequent sampling detection. SUMMARY

[0004] The purpose of the present application is to provide a groundwater detection sampling device to solve the problems in the background art.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The present application is a groundwater detection sampling device, comprising a main body, a water level sensor fixedly connected inside the main body, and further comprising:

[0007] A sliding mechanism is installed inside the main body for sampling water sources.

[0008] An auxiliary mechanism is installed on the outer surface of the sliding mechanism for blocking the mixing of water sources.

[0009] When the sliding mechanism sucks the water source into the main body, the auxiliary mechanism can block the water source in the upper and lower areas of the main body.

[0010] Further, the main body comprises:

[0011] A storage assembly is installed at the bottom of the main body by a fixing member.

[0012] A blocking assembly is installed inside the storage assembly.

[0013] A sliding assembly is installed inside the storage assembly.

[0014] Further, the sliding mechanism comprises a long rod sliding through the side wall of the main body, and the sliding mechanism comprises:

[0015] The fixing assembly is arranged at the bottom of the long rod.

[0016] Further, the auxiliary mechanism comprises a rubber ring arranged on the outer surface of the long rod, and the auxiliary mechanism comprises:

[0017] The movable assembly is arranged at the bottom of the rubber ring;

[0018] The opening and closing assembly is arranged inside the movable assembly.

[0019] Further, the fixing member comprises a sampling tube connected to the bottom of the main body by a bolt, the outer surface of the sampling tube is fixedly connected with a water inlet pipe, and the bottom of the sampling tube is provided with a circular hole;

[0020] The storage assembly comprises a plurality of long grooves arranged in the sampling tube in a circular array with the middle part of the sampling tube as the center;

[0021] The inside of the sampling tube is provided with a plurality of piston grooves one, and the inside of the sampling tube is provided with a plurality of piston grooves two;

[0022] The piston groove one is in communication with the piston groove two through the long groove;

[0023] The inside of the piston groove one is fixedly connected with a stop block one, the inside of the piston groove two is fixedly connected with a stop block two, the inner cavity of the sampling tube is narrow at the top and wide at the bottom, and is in the state shown in the figure.

[0024] Further, the blocking assembly comprises a piston rod one slidingly connected in the piston groove two, and the top of the piston rod one slidingly penetrates into the inside of the sampling tube;

[0025] The bottom inner wall of the piston rod one is fixedly connected with a return spring, and the top of the return spring is fixedly connected with the top inner wall of the piston groove two;

[0026] The top of the plurality of piston rod ones is fixedly connected with a blocking disc, and the bottom of the blocking disc is fixedly connected with a top rod.

[0027] Further, the sliding assembly comprises a sliding ring slidingly connected in the piston groove one, and the side wall of the sliding ring slidingly penetrates the piston rod two;

[0028] The bottom of the sliding ring on the outer surface of the piston rod two is fixedly connected with an auxiliary spring;

[0029] The bottom of the plurality of piston rod twos is fixedly connected with an inclined ring, and the bottom of the auxiliary spring is fixedly connected with the outer surface of the piston rod two.

[0030] Further, the outer surface of the long rod is provided with three rectangular grooves;

[0031] The fixed assembly comprises a piston disc I fixedly connected to the outer surface of the long rod, a rectangular groove is internally provided with an elastic plate, and the top of the elastic plate is fixedly connected to the inner wall of the top of the rectangular groove.

[0032] Further, the movable assembly comprises a piston disc II fixedly connected to the bottom of the rubber ring, and the piston disc II is slidingly connected to the outer surface of the long rod at the bottom of the piston disc I;

[0033] The inner wall of the piston disc II is provided with a plurality of cylindrical grooves, the top of the cylindrical groove is provided with a communication groove I, and the inner wall of the communication groove I is rotatably connected with a one-way plate;

[0034] The bottom of the cylindrical groove is provided with a communication groove II, and the inner wall of the communication groove II is rotatably connected with a one-way plate II.

[0035] Further, the opening and closing assembly comprises a spring disc fixedly connected to the inner wall of the cylindrical groove away from the long rod, and the side wall of the spring disc is fixedly connected with an inclined frame;

[0036] The end of the inclined frame away from the spring disc is fixedly connected with a triangular plate, and the top of the triangular plate is provided with a through groove.

[0037] The present application has the following beneficial effects:

[0038] 1、The present application, through the movable assembly and the fixed assembly, when the long rod drives the piston disc II to continue to move upward, the upward movement of the piston disc II will push the inclined ring to slide upward, at this time, the underground water outside the sampling tube will not enter the sampling tube through the circular hole at the bottom of the sampling tube, and at the same time, due to the blocking of the piston disc II by the inclined ring, when the long rod is continuously pulled, the elastic plate will be deformed and contracted after being extruded by the piston disc II, at this time, when the long rod is continuously pulled, the piston disc II will be separated from the piston disc II and drive the piston disc I to continue to slide upward in the narrow channel in the sampling tube, at this time, the continuous sliding of the piston disc I will draw the underground water in the peripheral region of the middle of the sampling tube through the water inlet pipe, and when the piston disc I and the piston disc II sample the underground water in the bottom region and the middle region outside the sampling tube respectively, the layered sampling of the underground water outside the sampling tube can be completed, the limitation of single region sampling during sampling can be reduced, the sampling efficiency can be improved, and the continuity and accuracy during subsequent underground water detection can be improved.

[0039] 2. In this invention, through the movable component and the opening and closing component, when the long rod separates from the piston disk II, the spring discs inside the multiple cylindrical grooves will push the tilting frame and triangular plates to slide under the release of their own spring elastic potential energy. When the multiple spring discs and triangular plates are sliding, the multiple triangular plates will close at the bottom of the piston disk II. At this time, the closed triangular plates will seal the bottom of the piston disk II. Through the closure of the multiple triangular plates and the sealing of the rubber ring, the mixing of groundwater in the wider and narrower sections of the sampling tube during the stratified sampling of water sources outside the sampling tube can be reduced. The blocking between the groundwater sampled in the wider and narrower sections by the piston disk II and the closed triangular plates can prevent water mixing while ensuring the independence of the water after sampling, reducing the impact of water mixing on the accuracy of subsequent detection, thereby ensuring the representativeness of the sample after sampling.

[0040] 3. In this invention, through the movable component and the storage component, when the spring disc slides, the opening of the one-way plate second extracts the residual gas between the bottom of the piston disc second and the sampling tube. This allows the residual gas in the sampling tube to enter multiple cylindrical grooves when water enters, thereby reducing the possibility of residual gas due to the space between the piston disc second and the bottom of the sampling tube during absorption. This also reduces the possibility of the residual gas occupying part of the space in the sampling tube, which could lead to discrepancies between the actual water sample volume and the sample volume. Furthermore, reducing residual gas also reduces the possibility of gas mixing with water during sampling, which could affect the water quality and purity of the sample. This improves sampling accuracy and stability while ensuring sample purity.

[0041] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0045] Figure 3 This is a schematic diagram of the main body of the invention;

[0046] Figure 4 This is a bottom view of the main body of the invention;

[0047] Figure 5 For the application Figure 4 Amplified schematic diagram at B in the application

[0048] Figure 6 For the application Figure 4 Amplified schematic diagram at B in the application

[0049] Figure 7 For the application Fixed component explosion schematic diagram

[0050] Figure 8 For the application Auxiliary mechanism schematic diagram

[0051] Figure 9 For the application Auxiliary mechanism movement schematic diagram

[0052] Figure 10 For the application Sliding component plane schematic diagram

[0053] Figure 11 For the application Sampling tube plane schematic diagram

[0054] In the drawings, the components represented by each reference numeral are listed as follows:

[0055] In the drawings: 1, main body; 101, water level sensor; 11, storage assembly; 111, sampling tube; 112, water inlet pipe; 113, long groove; 114, piston groove one; 115, piston groove two; 12, blocking assembly; 121, piston rod one; 122, blocking disc; 123, jacking rod; 13, sliding assembly; 131, sliding ring; 132, piston rod two; 133, inclined ring; 2, sliding mechanism; 201, long rod; 21, fixed component; 211, piston disc one; 212, elastic plate; 3, auxiliary mechanism; 301, rubber ring; 31, movable assembly; 311, piston disc two; 312, cylindrical groove; 313, communication groove one; 314, communication groove two; 32, opening and closing assembly; 321, spring disc; 322, inclined frame; 323, triangular plate. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the application.

[0057] Please refer to Figures 1-11 The application is a groundwater detection sampling device, which comprises a main body 1, a water level sensor 101 fixedly connected inside the main body 1, and further comprises;

[0058] The sliding mechanism 2 is arranged inside the main body 1, and is used for sampling the water source;

[0059] The auxiliary mechanism 3 is arranged on the outer surface of the sliding mechanism 2, and is used for blocking the mixing of the water source;

[0060] When the sliding mechanism 2 sucks the water source into the main body 1, the auxiliary mechanism 3 can block the water source in the upper and lower areas of the main body 1.

[0061] The main body 1 comprises:

[0062] The storage assembly 11 is arranged at the bottom of the main body 1 through the fixing member;

[0063] The blocking assembly 12 is arranged inside the storage assembly 11;

[0064] The sliding assembly 13 is arranged inside the storage assembly 11.

[0065] The sliding mechanism 2 comprises a long rod 201 slidingly penetrating the side wall of the main body 1, and the sliding mechanism 2 comprises:

[0066] The fixing assembly 21 is arranged at the bottom of the long rod 201.

[0067] The auxiliary mechanism 3 comprises a rubber ring 301 arranged on the outer surface of the long rod 201, and the auxiliary mechanism 3 comprises:

[0068] The movable assembly 31 is arranged at the bottom of the rubber ring 301;

[0069] The opening and closing assembly 32 is arranged inside the movable assembly 31.

[0070] The fixing member comprises a sampling pipe 111 screw-connected to the bottom of the main body 1, the outer surface of the sampling pipe 111 is fixedly connected with a water inlet pipe 112, and the bottom of the sampling pipe 111 is provided with a circular hole;

[0071] The storage assembly 11 comprises a plurality of long grooves 113 arranged in the sampling pipe 111, and the plurality of long grooves 113 are arranged in an array with the center of the sampling pipe 111 as the center axis;

[0072] The sampling pipe 111 is provided with a plurality of piston grooves one 114 and a plurality of piston grooves two 115;

[0073] The piston grooves one 114 are in communication with the piston grooves two 115 through the long grooves 113;

[0074] The inner part of the piston groove one 114 is fixedly connected with a stop block one, the inner part of the piston groove two 115 is fixedly connected with a stop block two, the inner cavity part of the sampling pipe 111 presents a state of being narrow at the top and wide at the bottom, and presents a state as shown in Figure 11 When the long rod 201 drives the piston disc two 311 to rise, a negative pressure is generated in the sampling pipe 111, at this time, the formation of the negative pressure drives the blocking disc 122 to rise through adsorption force to suck the underground water outside the sampling pipe 111, so that the underground water enters the sampling pipe 111 through the circular hole at the bottom of the sampling pipe 111.

[0075] The blocking assembly 12 comprises a piston rod one 121 slidingly connected in the inner part of the piston groove two 115, and the top of the piston rod one 121 slidingly penetrates into the inner part of the sampling pipe 111;

[0076] The bottom inner wall of the piston rod one 121 is fixedly connected with a return spring, and the top of the return spring is fixedly connected with the top inner wall of the piston groove two 115;

[0077] The top of the plurality of piston rod ones 121 is fixedly connected with the blocking disc 122, the bottom of the blocking disc 122 is fixedly connected with the top rod 123, the sliding of the blocking disc 122 drives the plurality of piston rod ones 121 to synchronously slide, and the plurality of piston rod ones 121 slide to extrude the gas in the piston groove two 115 and make the extruded gas enter into the piston groove one 114 through the long groove 113.

[0078] The sliding assembly 13 comprises a sliding ring 131 slidingly connected in the inner part of the piston groove one 114, and the side wall of the sliding ring 131 slidingly penetrates the piston rod two 132;

[0079] The bottom of the sliding ring 131 located on the outer surface of the piston rod two 132 is fixedly connected with an auxiliary spring;

[0080] The bottom of the auxiliary spring is fixedly connected with the outer surface of the piston rod two 132, and when the extruded gas enters into the piston groove one 114, the sliding ring 131 is pushed to slide downward, and the sliding ring 131 slides to drive the piston rod two 132 and the inclined ring 133 to synchronously move downward through the auxiliary spring.

[0081] Three rectangular grooves are formed in the outer surface of the long rod 201;

[0082] The fixed assembly 21 comprises a piston disc one 211 fixedly connected with the outer surface of the long rod 201, the inner part of the rectangular groove is provided with an elastic plate 212, the top of the elastic plate 212 is fixedly connected with the top inner wall of the rectangular groove, and when the long rod 201 is continuously pulled, the piston disc one 211 is separated from the piston disc two 311 and continuously slides upward in the narrower channel in the sampling pipe 111.

[0083] The active assembly 31 comprises a piston disc two 311 fixedly connected at the bottom of the rubber ring 301, and the piston disc two 311 is slidingly connected to the outer surface of the long rod 201 at the bottom of the piston disc one 211;

[0084] The inner wall of the piston disc two 311 is provided with a plurality of cylindrical grooves 312, the top of the cylindrical groove 312 is provided with a communication groove one 313, and the inside of the communication groove one 313 is rotatably connected with a one-way plate;

[0085] The bottom of the cylindrical groove 312 is provided with a communication groove two 314, the inside of the communication groove two 314 is rotatably connected with a one-way plate two, and the long rod 201 is separated from the piston disc two 311 when continuing to move upward after being pulled, and when the long rod 201 is separated from the piston disc two 311, the auxiliary springs on the plurality of piston rods two 132 push the inclined ring 133 to move downward by a distance.

[0086] The opening and closing assembly 32 comprises a spring disc 321 fixedly connected to the inner wall of the cylindrical groove 312 away from the long rod 201, and the side wall of the spring disc 321 is fixedly connected with an inclined frame 322;

[0087] The end of the inclined frame 322 away from the spring disc 321 is fixedly connected with a triangular plate 323, and the top of the triangular plate 323 is provided with a through groove.

[0088] In use, first, two pull ropes are connected with the top of the main body 1 and the top of the long rod 201 by external workers, then the workers pull the two ropes and transport the device into underground water, and when the main body 1 is completely immersed in water and the water level sensor 101 detects underground water, a signal is transmitted to the outside, at this time, the workers receive the signal and stop transporting the main body 1 in the underground water, then the workers pull the pull rope connected with the long rod 201 to make the long rod 201 drive the piston disc one 211 and the piston disc two 311 to slide upward in the sampling pipe 111, at this time, the upward movement of the piston disc two 311 and the piston disc one 211 will suck the underground water outside the sampling pipe 111 into the sampling pipe 111 through the circular hole at the bottom of the sampling pipe 111, then the main body 1 is pulled back to the ground to complete the purpose of sampling before detection, when the potential energy of the spring on the spring disc 321 is released and pushes the spring disc 321 and the inclined frame 322 to slide, the sliding of the spring disc 321 and the inclined frame 322 in the cylindrical groove 312 will generate negative pressure in the cylindrical groove 312.

[0089] When the staff pulls the pull rope connected with the long rod 201, the long rod 201 rises in the sampling pipe 111, and the plurality of elastic plates 212 on the long rod 201 are clamped at the bottom of the piston disc two 311, so that when the long rod 201 rises, the piston disc one 211 and the piston disc two 311 are synchronously lifted in the sampling pipe 111, and when the long rod 201 lifts the piston disc two 311, a negative pressure is generated in the sampling pipe 111, at this time, the formation of the negative pressure will bring the blocking disc 122 to rise by adsorption force to suck the underground water outside the sampling pipe 111, so that the underground water enters the sampling pipe 111 through the circular hole at the bottom of the sampling pipe 111, and when the blocking disc 122 slides under the action of the negative pressure and the pushing of the water flow, the sliding of the blocking disc 122 will drive the plurality of piston rods one 121 to slide synchronously, and the sliding of the plurality of piston rods one 121 will squeeze the gas in the piston groove two 115 and make the squeezed gas enter the piston groove one 114 through the long groove 113, and when the squeezed gas enters the piston groove one 114, it will push the sliding ring 131 to slide downward, and the sliding of the sliding ring 131 will drive the piston rod two 132 and the inclined ring 133 to move downward synchronously through the auxiliary spring, and when the piston disc two 311 continuously extracts the underground water outside and is about to move to the junction of the wider and narrower passages in the sampling pipe 111, the upward movement of the piston disc two 311 will make the rubber ring 301 contact with the side wall of the inclined ring 133, and then when the piston disc two 311 continues to move upward under the action of the long rod 201, the upward movement of the piston disc two 311 will push the inclined ring 133 to slide upward, at this time, the underground water outside the sampling pipe 111 will not enter the sampling pipe 111 through the circular hole at the bottom of the sampling pipe 111, and when the inclined ring 133 is pushed to slide upward, it will push the sliding ring 131 to squeeze the gas in the piston groove one 114 and make it enter the piston groove two 115 to reset the piston rod one 121, and the reset spring on the piston rod one 121 will also reset the piston rod one 121 under the action of the elastic potential energy, and because the piston disc two 311 is blocked by the inclined ring 133, when the long rod 201 continues to be pulled, the elastic plate 212 will be squeezed by the piston disc two 311 to deform and shrink, at this time, when the long rod 201 continues to be pulled, it will separate from the piston disc two 311 and drive the piston disc one 211 to continue to slide upward in the narrower passage in the sampling pipe 111, at this time, the continuous sliding of the piston disc one 211 will extract the underground water in the peripheral area of the middle part of the sampling pipe 111 through the water inlet pipe 112, and when the piston disc one 211 and the piston disc two 311 sample the underground water in the external, bottom and middle parts of the sampling pipe 111 respectively, the stratified sampling of the underground water outside the sampling pipe 111 can be completed, which can reduce the limitations of single area sampling during sampling, improve the sampling efficiency, and improve the continuity and accuracy of subsequent underground water detection.

[0090] When the piston disc two 311 is blocked by the tilting ring 133 after being extruded by the upward movement of the piston disc two 311, the long rod 201 will be pulled and continue to move upward, and the long rod 201 will be separated from the piston disc two 311. When the long rod 201 is separated from the piston disc two 311, the auxiliary spring on the plurality of piston rods two 132 will push the tilting ring 133 to move downward by a distance. When the tilting ring 133 continues to move downward, it will push the rubber ring 301 and the piston disc two 311 to move downward. Because there is underground water being sucked at the bottom of the piston disc two 311, when the piston disc two 311 and the rubber ring 301 are pushed by the tilting ring 133, the tilting ring 133 will tightly fit with the rubber ring 301. At this time, the rubber ring 301 can seal between the piston disc two 311, the tilting ring 133 and the relatively wide inner wall of the sampling tube 111. At the same time, when the long rod 201 is separated from the piston disc two 311, the spring disc 321 inside the plurality of cylindrical grooves 312 will push the tilting frame 322 and the triangular plate 323 to slide under the release of the spring elastic potential energy of the spring disc 321. When the plurality of spring discs 321 and the triangular plate 323 slide, the plurality of triangular plates 323 will close at the bottom of the piston disc two 311. At this time, the closed triangular plates 323 will seal the bottom of the piston disc two 311. Through the closure of the plurality of triangular plates 323 and the sealing of the rubber ring 301, the mixing of the relatively wide and narrow underground water in the sampling tube 111 during the stratified sampling of the water outside the sampling tube 111 can be reduced. The blocking of the piston disc two 311 and the closed triangular plates 323 between the relatively wide and narrow underground water can prevent water mixing while ensuring the independence of the water after sampling, reducing the influence of water mixing on the accuracy of subsequent detection, so as to ensure the representativeness of the sample after sampling.

[0091] When the spring potential energy on the spring disc 321 is released and pushes the spring disc 321 and the tilting frame 322 to slide, the sliding of the spring disc 321 and the tilting frame 322 in the cylindrical groove 312 will generate negative pressure in the cylindrical groove 312. At this time, the formation of negative pressure will make the one-way plate two in the communication groove two 314 open and the one-way plate in the communication groove one 313 close. When the spring disc 321 slides, the residual gas between the bottom of the piston disc two 311 and the sampling tube 111 will be extracted through the opening of the one-way plate two and the through groove on the triangular plate 323, so that the residual gas in the sampling tube 111 enters the plurality of cylindrical grooves 312 when the water enters, thereby reducing the residual gas when the water enters after the space between the piston disc two 311 and the bottom of the sampling tube 111. At the same time, the residual gas can reduce the situation that the water sampling amount after water sampling does not match the actual situation due to the occupation of part of the space in the sampling tube 111 by the residual gas. At the same time, by reducing the residual gas, the mixing of gas and water during sampling can be reduced, thereby affecting the water quality and sample purity of the sample, improving the sampling accuracy and stability while ensuring the purity of the sample.

[0092] The preferred embodiments of the application disclosed above are only to help explain the present application. The preferred embodiments are not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of this teaching. It is intended that the specification be considered as exemplary only with the factual recitations being intended to be within the scope of the application, as it is defined by the appended claims and their equivalents.

Claims

1. A groundwater detection sampling device, comprising a main body (1), the inside of the main body (1) is fixedly connected with a water level sensor (101), characterized in that, Also includes; The sliding mechanism (2) is installed and arranged inside the main body (1), and is used for sampling water source; The sliding mechanism (2) includes a long rod (201) sliding through the main body (1), and a fixed assembly (21) installed and arranged at the bottom of the long rod (201); Three rectangular grooves are formed in the outer surface of the long rod (201); The fixed assembly (21) includes a piston disc I (211) fixedly connected to the outer surface of the long rod (201), the rectangular groove is provided with an elastic plate (212) inside, and the top of the elastic plate (212) is fixedly connected with the inner wall of the top of the rectangular groove; The auxiliary mechanism (3) is installed and arranged on the outer surface of the sliding mechanism (2), and is used for blocking the mixing of the water source; The auxiliary mechanism (3) includes a rubber ring (301) arranged on the outer surface of the long rod (201), and a movable assembly (31) installed and arranged at the bottom of the rubber ring (301); The movable assembly (31) includes a piston disc II (311) fixedly connected to the bottom of the rubber ring (301), and the piston disc II (311) is slidingly connected to the outer surface of the long rod (201) at the bottom of the piston disc I (211); When the sliding mechanism (2) sucks the water source into the main body (1), the auxiliary mechanism (3) can block the water source in the upper and lower areas of the main body (1); The main body (1) includes: The storage assembly (11) is installed and arranged at the bottom of the main body (1) through a fixing piece; The fixing piece includes a sampling pipe (111) screwed to the bottom of the main body (1), the outer surface of the sampling pipe (111) is fixedly connected with a water inlet pipe (112), and the bottom of the sampling pipe (111) is provided with a circular hole; The storage assembly (11) includes a plurality of long grooves (113) formed in the inside of the sampling pipe (111), and the plurality of long grooves (113) are arranged in an array with the central axis being the middle part of the sampling pipe (111); The inside of the sampling pipe (111) is provided with a plurality of piston grooves I (114), and the inside of the sampling pipe (111) is provided with a plurality of piston grooves II (115); The piston groove I (114) is in communication with the piston groove II (115) through the long groove (113), and the inner cavity of the sampling pipe (111) is in a state of being narrow at the top and wide at the bottom; The blocking assembly (12) is installed and arranged in the inside of the storage assembly (11); The blocking assembly (12) includes a piston rod I (121) slidingly connected in the inside of the piston groove II (115), and the top of the piston rod I (121) slidingly penetrates into the inside of the sampling pipe (111); The bottom inner wall of the piston rod I (121) is fixedly connected with a return spring, and the top of the return spring is fixedly connected with the top inner wall of the piston groove II (115); The top of the piston rod I (121) is fixedly connected with a blocking disc (122), and the bottom of the blocking disc (122) is fixedly connected with a top rod (123); The sliding assembly (13) is mounted and arranged inside the storage assembly (11); The sliding assembly (13) comprises a sliding ring (131) slidingly connected inside the first piston groove (114), and a piston rod (132) slidingly penetrating the side wall of the sliding ring (131); The bottom of the sliding ring (131) is fixedly connected with an auxiliary spring on the outer surface of the piston rod (132); The bottom of the piston rod (132) is fixedly connected with an inclined ring (133), and the bottom of the auxiliary spring is fixedly connected with the outer surface of the piston rod (132); When the long rod (201) is pulled up, the piston disc (211) and the piston disc (311) are simultaneously pulled up in the sampling tube (111) due to the clamping of the multiple elastic plates (212) on the long rod (201) on the bottom of the piston disc (311). When the long rod (201) pulls up the piston disc (311), a negative pressure is generated in the sampling tube (111), and the negative pressure drives the blocking disc (122) to rise by adsorption force to suck the underground water outside the sampling tube (111), so that the underground water enters the sampling tube (111) through the circular hole at the bottom of the sampling tube (111). The sliding of the blocking disc (122) drives the multiple piston rods (121) to slide synchronously, and the sliding of the multiple piston rods (121) squeezes the gas in the second piston groove (115) and makes the squeezed gas enter the first piston groove (114) through the long groove (113). When the squeezed gas enters the first piston groove (114), it pushes the sliding ring (131) to slide downward, and the sliding of the sliding ring (131) drives the piston rod (132) and the inclined ring (133) to move downward synchronously through the auxiliary spring. When the piston disc (311) continuously extracts the underground water outside and is about to move to the junction of the wide and narrow passages in the sampling tube (111), the upward movement of the piston disc (311) causes the rubber ring (301) to contact the side wall of the inclined ring (133). When the long rod (201) continues to pull up the piston disc (311), the upward movement of the piston disc (311) pushes the inclined ring (133) to slide upward, so that the underground water outside the sampling tube (111) cannot enter the sampling tube (111) through the circular hole at the bottom of the sampling tube (111). At the same time, the piston disc (311) is blocked by the inclined ring (133), so that the elastic plate (212) is deformed and shrinks after being squeezed by the piston disc (311) when the long rod (201) is continuously pulled. At this time, the long rod (201) is separated from the piston disc (311) and drives the piston disc (211) to continue to slide upward in the narrow passage of the sampling tube (111), and the continuous sliding of the piston disc (211) extracts the underground water in the middle peripheral region of the sampling tube (111) through the water inlet pipe (112).

2. The groundwater detection sampling device of claim 1, wherein: The auxiliary mechanism (3) further comprises an opening and closing assembly (32) which is mounted inside the movable assembly (31).

3. A groundwater detection sampling device according to claim 2, wherein: The inner wall of the second piston disc (311) is provided with a plurality of cylindrical grooves (312), the top of each cylindrical groove (312) is provided with a communication groove I (313), and the inner part of the communication groove I (313) is rotatably connected with a one-way plate; The bottom of each cylindrical groove (312) is provided with a communication groove II (314), and the inner part of the communication groove II (314) is rotatably connected with a second one-way plate.

4. A groundwater detection sampling device according to claim 3, wherein: The opening and closing assembly (32) comprises a spring disc (321) fixedly connected to the inner wall of the cylindrical groove (312) away from the long rod (201), and the side wall of the spring disc (321) is fixedly connected with an inclined frame (322). One end of the inclined frame (322) away from the spring disc (321) is fixedly connected with a triangular plate (323), and the top of the triangular plate (323) is provided with a through groove.

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