An integrated device for in-situ detection and stratified sampling of groundwater pollution

Abstract

This invention relates to the field of water pollution detection technology and discloses an integrated device for in-situ detection and stratified sampling of groundwater pollution. The device includes a drill pipe, a stratified sampling mechanism, and an in-situ detection mechanism. It also includes a stratified sampling tube assembly fixedly installed inside the drill pipe. The stratified sampling tube assembly consists of multiple sets of sampling tubes arranged vertically. Each set of sampling tubes has a first mounting plate above it, and each first mounting plate has a second mounting plate above it. A drive conversion mechanism is rotatably mounted on the top of each second mounting plate. The technical solution of this invention, through the configuration of the stratified sampling tube assembly, the drive conversion mechanism, and the mechanical linkage mechanism, achieves automated and integrated operation of stratified sampling by the stratified sampling mechanism corresponding to each sampling tube and in-situ detection by the in-situ detection mechanism. This enables rapid in-situ determination and targeted sampling of groundwater pollution conditions, improves work efficiency, and meets the requirements of rapid on-site investigation.

Description

Technical Field

[0001] This invention relates to the field of water pollution detection technology, and in particular to an integrated device for in-situ detection and stratified sampling of groundwater pollution. Background Technology

[0002] Groundwater is one of humanity's most precious water resources. It is not only crucial for agricultural production but also has a significant impact on people's daily lives and industrial activities. However, with the acceleration of industrial development and urbanization, the risk of groundwater pollution is constantly increasing. The main sources of groundwater pollution include industrial emissions, agricultural pollution, and domestic wastewater discharge. Once groundwater is polluted, it is not only difficult to restore but also extremely costly to remediate, causing significant impacts on the environment and socio-economic development.

[0003] In hydrogeological and environmental surveys and groundwater pollution control, we often face problems such as unclear multi-depth stratification characteristics of groundwater in contaminated sites, disconnect between in-situ detection and sampling, and cumbersome operation of traditional equipment that is prone to cross-contamination of water samples. Traditional detection equipment and samplers are independent of each other, and stratified sampling requires multiple drilling operations, which can easily lead to mixing of water samples from different depths and make it difficult to accurately reflect the distribution pattern of pollution. Moreover, detection and sampling are carried out in steps and require the assistance of electronic equipment for judgment. Due to the many on-site operation procedures, it is difficult to achieve rapid in-situ judgment of pollution status and targeted sampling, which cannot meet the work requirements of accurate source tracing and rapid on-site investigation of groundwater pollution. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes an integrated device for in-situ detection and stratified sampling of groundwater pollution. This addresses the problems of traditional equipment being cumbersome to operate and prone to cross-contamination of water samples. Traditional detection equipment and samplers are independent of each other, and stratified sampling requires multiple drilling operations, which can easily lead to mixing of water samples at different depths and make it difficult to accurately reflect the distribution pattern of pollution. Furthermore, detection and sampling are carried out in separate steps, requiring the assistance of electronic equipment for judgment. Due to the numerous on-site operation procedures, it is difficult to achieve rapid in-situ judgment of pollution status and targeted sampling, thus failing to meet the work requirements of accurate source tracing and rapid on-site investigation of groundwater pollution.

[0005] To solve the above-mentioned technical problems, the basic technical solution proposed by this invention is as follows:

[0006] An integrated device for in-situ detection and stratified sampling of groundwater pollution includes a drill pipe, a stratified sampling mechanism and an in-situ detection mechanism, and also includes a stratified sampling tube group fixedly installed inside the drill pipe. The stratified sampling tube group consists of multiple groups of sampling tubes arranged vertically, and each group of sampling tubes has a sampling port on the top of its front side.

[0007] Each set of sampling tubes is equipped with a first mounting plate at the top, and the first mounting plate is fixedly installed on the inner wall of the drill pipe. Each first mounting plate is equipped with a second mounting plate at the top, and the second mounting plate is fixedly installed on the inner wall of the drill pipe.

[0008] A mechanical linkage mechanism is fixedly installed between the first mounting plate and the second mounting plate. The mechanical linkage mechanism consists of a transmission rod, a gear sleeve, a linkage gear, a worm gear, and a worm. The gear sleeve is movably sleeved on the outside of the transmission rod and meshes with the linkage gear. One side of the linkage gear is fixedly connected to one side of the worm gear through a shaft, and the other side of the linkage gear and the other side of the worm gear are mounted on the top of the first mounting plate through a bearing seat. The worm is rotatably mounted on the top of the first mounting plate, and the worm gear meshes with the worm.

[0009] The inner wall of the drill pipe is provided with a detection port, and the in-situ detection mechanism is fixedly installed at the bottom of the first mounting plate. The in-situ detection mechanism consists of a transmission gear, a reciprocating screw, a screw sleeve seat, a detection probe, a sealing valve plate, and a detection control rod. The transmission gear is fixedly installed at the bottom of the first mounting plate through a bearing seat. The transmission gear is meshed with the gear plate sleeve. One end of the reciprocating screw is fixedly connected to one end of the transmission gear. The screw sleeve seat is threaded onto the outside of the reciprocating screw. The detection probe is fixedly installed at the bottom of the screw sleeve seat. One end of the detection control rod is sleeved onto the outside of the detection probe. The other end of the detection control rod is fixedly connected to the sealing valve plate, and the sealing valve plate extends movably into the detection port.

[0010] The stratified sampling mechanism is movably installed inside the sampling tube; the stratified sampling mechanism consists of a guide rail groove wheel, a moving block, an opening and closing linkage, a filter screen, and an opening and closing valve plate. The guide rail groove wheel is fixedly installed at the bottom end of the transmission rod, and the moving block is fixedly installed at one end of the opening and closing linkage. The opening and closing linkage is movably connected to the guide rail groove wheel through the moving block. One side of the filter screen is fixedly installed at the other end of the opening and closing linkage, and the opening and closing valve plate is fixedly installed at the other side of the filter screen. The filter screen and the opening and closing valve plate are movably installed inside the sampling port.

[0011] A drive conversion mechanism is rotatably mounted on the top of the second mounting plate. The drive conversion mechanism consists of a servo motor and a conversion component. The servo motor is fixedly mounted on the bottom of the second mounting plate, and the output end of the servo motor is connected to the conversion component. The conversion component is connected to the transmission rod and worm gear. A locking mechanism is fixedly mounted on the top of the second mounting plate. The locking mechanism is connected to the conversion component via a spline.

[0012] After the entire device is drilled to the target depth, the forward rotation of the servo motor drives the conversion component to transmit power to the transmission rod. The rotation of the transmission rod drives the guide rail groove wheel to rotate. When the guide rail inside the groove wheel rotates to the maximum radius position, the moving block pushes the opening and closing linkage rod to move outward. The outward-moving opening and closing linkage rod pushes the opening and closing valve plate to move out of the sampling port through the filter screen at one end, opening the sampling port. The water sample enters the sampling tube through the filter screen. After sampling is completed, the guide rail groove wheel continues to rotate, so that the guide rail inside the groove wheel rotates to the minimum radius position. At this time, the moving block pulls the opening and closing linkage rod to move inward. The inward-moving opening and closing linkage rod pulls the opening and closing valve plate to reset through the filter screen at one end, automatically closing the sampling port to achieve a seal.

[0013] During drilling, the detection probe is in a retracted and sealed state. After reaching the target depth, the servo motor drives the conversion component to transmit power to the worm gear. The worm gear drives the meshing worm wheel to rotate in both directions, which in turn drives the linkage gear to rotate in both directions via the shaft. The rotating linkage gear drives the meshing gear disc sleeve to move vertically back and forth. The downward-moving gear disc sleeve drives the meshing transmission gear to rotate in both directions, which in turn drives the reciprocating screw to rotate in both directions. The screw sleeve seat converts the rotational force of the reciprocating screw into linear motion, which drives the detection probe to extend and retract. The outward-moving detection probe drives the sealing valve plate to extend out of the detection port on the inner wall of the drill pipe through the detection control rod, thereby opening the detection port and allowing the detection end of the detection probe to contact the groundwater for detection. After the detection medium has completed its reaction, the screw sleeve seat drives the detection probe to retract, and at the same time, the detection control rod drives the sealing valve plate to return to the detection port on the inner wall of the drill pipe, realizing in-situ detection of groundwater pollution characteristic indicators.

[0014] During testing, the locking mechanism locks the transmission rod, keeping the opening and closing valve plate closed; during sampling, the locking mechanism is unlocked, and the corresponding opening and closing valve plate is opened through the transmission rod, realizing the orderly switching between testing and sampling.

[0015] Preferably, the conversion assembly consists of a drive gear, a slide rail, a moving gear, a first driven gear, a second driven gear, and a slider. The drive gear is fixedly mounted on the output end of the servo motor, the slide rail is fixedly mounted on the top of the second mounting plate, the slider is movably mounted inside the slide rail, and the moving gear is rotatably mounted on the top of the slider, moving along the slide rail via the slider. The first driven gear and the second driven gear are symmetrically distributed on the outside of the slide rail and are rotatably mounted on the top of the second mounting plate. The drive gear meshes with the moving gear, and the moving gear dynamically meshes with the first and second driven gears.

[0016] Preferably, the top of the moving gear and the first driven gear are provided with spline holes, and the bottom end of the second driven gear is fixedly connected to the top end of the worm gear through a connecting plate.

[0017] Preferably, the locking mechanism consists of a mounting bracket, a locking pawl, a return spring, a positioning ratchet, and an unlocking abutment wheel. The mounting bracket is fixedly mounted on the top of the second mounting plate. One end of the locking pawl is mounted on the bottom of the mounting bracket via a pivot. One end of the return spring is fixedly mounted on the top of the locking pawl, and the other end of the return spring is fixedly mounted on one side of the mounting bracket.

[0018] Preferably, a spline rod is fixedly installed at the bottom of both the positioning ratchet and the unlocking abutment wheel. The bottom of the positioning ratchet is inserted into the spline hole at the top of the first driven gear through the spline rod, and the positioning ratchet is dynamically engaged with the locking pawl. The bottom of the unlocking abutment wheel is inserted into the spline hole at the top of the moving gear through the spline rod, so that the unlocking abutment wheel moves with the moving gear.

[0019] Preferably, the drill pipe has equidistant air grooves on its outside, each air groove is fitted with a packer on its outside, and a drill bit is fixedly installed at the bottom end of the drill pipe.

[0020] Preferably, the inner wall of the drill pipe is provided with an inflation assembly, which consists of an inflation chamber and an inflation valve pipe. The inflation chamber is opened on the inner wall of the drill pipe, and one end of the inflation valve pipe is connected to the inflation chamber. The other end of the inflation valve pipe passes through the inflation groove and is connected to the packer.

[0021] Preferably, the detection control rod consists of a sleeve and two control rods. The sleeve is fixedly fitted onto one end of the outer side of the detection probe, one end of each control rod is fixedly installed on one side of the sleeve, and the other end of each control rod is fixedly connected to a sealing valve plate.

[0022] The beneficial effects of this invention are:

[0023] The technical solution of the present invention is to set up a layered sampling tube group, with multiple independent sampling tubes arranged vertically, each sampling tube corresponding to a water layer at a different depth; and each group of sampling tubes is equipped with an independent layered sampling mechanism, in-situ detection mechanism, drive conversion mechanism, locking mechanism and mechanical linkage mechanism;

[0024] During sampling, the drive conversion mechanism switches to sampling drive mode, which in turn drives the mechanical linkage mechanism to operate. The operating mechanical linkage mechanism drives the opening and closing valve plate in the corresponding stratified sampling mechanism to move out of the sampling port, opening the sampling port and allowing the water sample to enter the sampling tube through the filter screen. After sampling is completed, the opening and closing valve plate in the stratified sampling mechanism continues to operate and moves in the reverse direction to reset, sealing the sampling port. Each sampling tube operates independently, thereby avoiding the mixing of water samples from different depths and achieving the purpose of independently collecting groundwater samples from corresponding locations. This allows for the acquisition of true water samples from each aquifer, accurately reflecting the pollution distribution pattern and meeting the needs of accurate source tracing and rapid on-site investigation.

[0025] During testing, the in-situ detection mechanism is installed at the corresponding sampling pipe positions. During drilling, the in-situ detection mechanism is in a contracted, sealed state. After reaching the target depth, it is switched to detection drive mode via a drive conversion mechanism. At this time, the locking mechanism locks the stratified sampling mechanism, keeping the opening and closing valve closed to prevent water samples from entering the sampling pipe and causing contamination. The drive conversion mechanism drives the mechanical linkage mechanism to transmit power to the in-situ detection mechanism, causing the detection probe in the in-situ detection mechanism to extend through the detection port on the inner wall of the drill pipe via the detection control rod, allowing the detection end of the detection probe to contact the groundwater for detection. After the detection medium has completed its reaction, the drive conversion mechanism drives the mechanical linkage mechanism in the opposite direction to reset the in-situ detection mechanism, retracting the detection probe and sealing the detection port on the inner wall of the drill pipe with the sealing valve. This achieves in-situ detection of groundwater pollution characteristic indicators, avoiding errors caused by separating detection and sampling in traditional methods, and improving the timeliness and accuracy of the detection.

[0026] By setting up stratified sampling tube groups, drive conversion mechanisms, and mechanical linkage mechanisms, the stratified sampling mechanism corresponding to each sampling tube and the in-situ detection mechanism are automated and integrated, solving the problems of step-by-step sampling and detection and the need for multiple drilling operations for stratified sampling in traditional methods. This achieves rapid in-situ determination of groundwater pollution status and targeted sampling, improves work efficiency, and meets the requirements of rapid field investigation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the first internal structure of the drill pipe in this invention;

[0029] Figure 3 This is a schematic diagram of the second internal structure of the drill pipe in this invention;

[0030] Figure 4 This is a schematic diagram of the inflatable component structure in this invention;

[0031] Figure 5 This is a schematic diagram of the sampling tube structure in this invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the sampling tube in this invention.

[0033] Figure 7 This is a schematic diagram of the transmission connection between the drive conversion mechanism and the mechanical linkage mechanism in this invention;

[0034] Figure 8 This is a schematic diagram showing the transmission connection between the mechanical linkage mechanism, the layered sampling mechanism, and the in-situ detection mechanism in this invention.

[0035] Figure 9 This is a schematic diagram of the layered sampling mechanism and in-situ detection mechanism in this invention;

[0036] Figure 10 This is a schematic diagram showing the connection between the drive conversion mechanism and the locking mechanism in this invention;

[0037] Figure 11 This is a schematic diagram of the drive conversion mechanism in the present invention;

[0038] Figure 12 This is a schematic diagram of the conversion component structure in this invention;

[0039] Figure 13 This is a schematic diagram of the connection structure between the slide rail frame and the slider in this invention;

[0040] Figure 14 This is a schematic diagram of the locking mechanism structure in this invention;

[0041] Figure 15 This is a schematic diagram of the sampling drive mode structure of the drive conversion mechanism in this invention;

[0042] Figure 16 This is a schematic diagram of the drive conversion mechanism for detecting drive modes in this invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Drill pipe; 101. Packer; 102. Drill bit; 103. Inflation groove; 104. Inflation assembly; 1041. Inflation chamber; 1042. Inflation valve pipe; 2. Layered sampling mechanism; 201. Guide rail grooved wheel; 202. Moving block; 203. Opening and closing linkage; 204. Filter screen; 205. Opening and closing valve plate; 3. In-situ detection mechanism; 301. Transmission gear; 302. Reciprocating lead screw; 303. Sleeve seat; 304. Detection probe; 305. Sealing valve plate; 306. Detection control rod; 4. Drive conversion mechanism; 401. Servo motor; 402. Rotary... Replacement components; 4021, drive gear; 4022, slide rail; 4023, moving gear; 4024, first driven gear; 4025, second driven gear; 4026, slider; 5, locking mechanism; 501, mounting bracket; 502, locking pawl; 503, return spring; 504, positioning ratchet; 505, unlocking contact wheel; 6, mechanical linkage mechanism; 601, transmission rod; 602, gear plate sleeve; 603, linkage gear; 604, worm gear; 605, worm; 7, sampling tube; 701, sampling port; 8, first mounting plate; 9, second mounting plate. Detailed Implementation

[0045] The following will be combined with the appendix Figure 1 To be continued Figure 16The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] An integrated device for in-situ detection and stratified sampling of groundwater pollution includes a drill pipe 1, a stratified sampling mechanism 2, and an in-situ detection mechanism 3. It also includes a stratified sampling tube assembly fixedly installed inside the drill pipe 1. The stratified sampling tube assembly consists of multiple sets of sampling tubes 7 arranged vertically, each set of sampling tubes 7 having a sampling port 701 at the top of its front side. Each set of sampling tubes 7 can collect groundwater samples at different depths. The stratified sampling tube assembly can precisely select the required sampling depth, and groundwater samples can be independently collected from corresponding locations through the sampling ports of each set of sampling tubes 7. These samples can be analyzed separately, thus achieving precise and stratified detection of groundwater quality, ensuring the accuracy and effectiveness of the detection.

[0047] Each sampling tube 7 is provided with a first mounting plate 8 above it, and the first mounting plate 8 is fixedly installed on the inner wall of the drill pipe 1. Each first mounting plate 8 is provided with a second mounting plate 9 above it, and the second mounting plate 9 is fixedly installed on the inner wall of the drill pipe 1.

[0048] A mechanical linkage mechanism 6 is fixedly installed between the first mounting plate 8 and the second mounting plate 9. The mechanical linkage mechanism 6 consists of a transmission rod 601, a gear sleeve 602, a linkage gear 603, a worm gear 604, and a worm 605. The gear sleeve 602 is movably sleeved on the outside of the transmission rod 601 and meshes with the linkage gear 603. One side of the linkage gear 603 is fixedly connected to one side of the worm gear 604 through a shaft. The other side of the linkage gear 603 and the other side of the worm gear 604 are mounted on the top of the first mounting plate 8 through a bearing seat. The worm 605 is rotatably mounted on the top of the first mounting plate 8, and the worm gear 604 meshes with the worm 605.

[0049] The inner wall of the drill pipe 1 is provided with a detection port. The in-situ detection mechanism 3 is fixedly installed at the bottom of the first mounting plate 8. The in-situ detection mechanism 3 consists of a transmission gear 301, a reciprocating screw 302, a threaded sleeve seat 303, a detection probe 304, a sealing valve plate 305, and a detection control rod 306. The transmission gear 301 is fixedly installed at the bottom of the first mounting plate 8 through a bearing seat. The transmission gear 301 is meshed with the gear plate sleeve 602. One end of the reciprocating screw 302 is fixedly connected to one end of the transmission gear 301. The threaded sleeve seat 303 is threaded onto the outside of the reciprocating screw 302. The detection probe 304 is fixedly installed at the bottom of the threaded sleeve seat 303. One end of the detection control rod 306 is sleeved onto the outside of the detection probe 304. The other end of the detection control rod 306 is fixedly connected to the sealing valve plate 305, and the sealing valve plate 305 extends movably into the detection port.

[0050] The stratified sampling mechanism 2 is movably installed inside the sampling tube 7. The stratified sampling mechanism 2 consists of a guide rail groove wheel 201, a moving block 202, an opening and closing connecting rod 203, a filter screen 204, and an opening and closing valve plate 205. The guide rail groove wheel 201 is fixedly installed at the bottom end of the transmission rod 601, and the moving block 202 is fixedly installed at one end of the opening and closing connecting rod 203. The opening and closing connecting rod 203 is movably connected to the guide rail groove wheel 201 through the moving block 202. One side of the filter screen 204 is fixedly installed at the other end of the opening and closing connecting rod 203, and the opening and closing valve plate 205 is fixedly installed at the other side of the filter screen 204. The filter screen 204 and the opening and closing valve plate 205 are movably installed inside the sampling port 701.

[0051] The top of the second mounting plate 9 is rotatably mounted with a drive conversion mechanism 4. The drive conversion mechanism 4 consists of a servo motor 401 and a conversion component 402. The servo motor 401 is fixedly mounted on the bottom of the second mounting plate 9, and the output end of the servo motor 401 is connected to the conversion component 402. The conversion component 402 is connected to the transmission rod 601 and the worm gear 605.

[0052] The conversion component 402 comprises a drive gear 4021, a slide rail 4022, a moving gear 4023, a first driven gear 4024, a second driven gear 4025, and a slider 4026. The drive gear 4021 is fixedly mounted on the output end of the servo motor 401. The slide rail 4022 is fixedly mounted on the top of the second mounting plate 9. The slider 4026 is movably mounted inside the slide rail 4022. The moving gear 4023 is rotatably mounted on the top of the slider 4026 and moves along the slide rail 4022 via the slider 4026. The first driven gear 4024, second driven gear 4025, and third driven gear 4026 are all driven by the first driven gear 4024 and the second driven gear 4025. Gear 4024 and second driven gear 4025 are symmetrically distributed on the outside of slide rail frame 4022, and first driven gear 4024 and second driven gear 4025 are rotatably mounted on the top of second mounting plate 9. The driving gear 4021 is meshed with moving gear 4023, and moving gear 4023 is dynamically meshed with first driven gear 4024 and second driven gear 4025. Spline holes are opened on the top of moving gear 4023 and first driven gear 4024, and the bottom end of second driven gear 4025 is fixedly connected to the top of worm gear 605 through connecting plate.

[0053] It should be noted that the drive conversion mechanism 4 has two transmission modes: sampling drive mode and detection drive mode. During sampling, the drive conversion mechanism 4 switches to sampling drive mode. Specifically, the servo motor 401 drives the active gear 4021 to rotate forward. The forward rotating active gear 4021 drives the meshing moving gear 4023 to rotate, while simultaneously moving the moving gear 4023 along the slide rail frame 4022 via the slider 4026 to the side close to the first driven gear 4024, so that the moving gear 4023 meshes with the first driven gear 4024. The rotating moving gear 4023 drives the transmission rod 601 at the bottom to rotate through the meshing first driven gear 4024, driving the layered sampling mechanism 2 to run for sampling.

[0054] During testing, the drive conversion mechanism 4 switches to the testing drive mode. Specifically, the servo motor 401 drives the active gear 4021 to rotate in the opposite direction. The reverse-rotating active gear 4021 drives the meshing movable gear 4023 to rotate, while simultaneously moving the movable gear 4023 along the slide rail frame 4022 via the slider 4026 to the side close to the second driven gear 4025, so that the movable gear 4023 meshes with the second driven gear 4025. The rotating movable gear 4023 drives the worm gear 605 at the bottom to rotate through the meshing second driven gear 4025, driving the in-situ testing mechanism 3 to run for in-situ testing.

[0055] A locking mechanism 5 is fixedly installed on the top of the second mounting plate 9, and the locking mechanism 5 is splinedly connected to the conversion component 402;

[0056] The locking mechanism 5 consists of a mounting bracket 501, a locking pawl 502, a return spring 503, a positioning ratchet 504, and an unlocking contact wheel 505. The mounting bracket 501 is fixedly mounted on the top of the second mounting plate 9. One end of the locking pawl 502 is mounted on the bottom of the mounting bracket 501 via a rotating shaft. One end of the return spring 503 is fixedly mounted on the top of the locking pawl 502, and the other end of the return spring 503 is fixedly mounted on one side of the mounting bracket 501.

[0057] Both the positioning ratchet 504 and the unlocking abutment wheel 505 have splined rods fixedly installed at their bottoms. The bottom of the positioning ratchet 504 is inserted into the splined hole at the top of the first driven gear 4024 through the splined rod, and the positioning ratchet 504 is dynamically engaged with the locking pawl 502. The bottom of the unlocking abutment wheel 505 is inserted into the splined hole at the top of the moving gear 4023 through the splined rod, so that the unlocking abutment wheel 505 moves with the moving gear 4023.

[0058] During sampling, the moving gear 4023 drives the top unlocking contact wheel 505 to approach the locking pawl 502, causing the locking pawl 502 to rotate against it. The rotating locking pawl 502 stretches the return spring 503, and one end of the rotating locking pawl 502 moves away from the positioning ratchet 504, releasing the lock on the positioning ratchet 504, thereby unlocking the first driven gear 4024. The first driven gear 4024, which is easy to rotate, drives the layered sampling mechanism 2 to open and close through the transmission rod 601.

[0059] During testing, the moving gear 4023 drives the top unlocking contact wheel 505 away from the locking pawl 502. The reset force of the reset spring 503 drives the locking pawl 502 to reset, locking the positioning ratchet 504 and keeping the opening and closing valve plate 205 closed, preventing water sample from entering the sampling chamber and causing contamination during the testing process; thus achieving an orderly switching between testing and sampling.

[0060] After the entire device drills to the target depth, the drive conversion mechanism 4 switches to sampling drive mode. The forward rotation of the servo motor 401 drives the conversion assembly 402 to transmit power to the transmission rod 601. Specifically, the servo motor 401 drives the drive gear 4021 to rotate forward, and the forward-rotating drive gear 4021 drives the meshed moving gear 4023 to rotate. Since the slider 4026 is movably mounted within the slide rail frame 4022, while the drive gear 4021 drives the moving gear 4023 to rotate, the moving gear 4023 moves to the slide rail frame 4026 via the slider 4026. At one end of the rail frame 4022, the moving gear 4023 meshes with the first driven gear 4024; at this time, the unlocking abutment wheel 505 on the top of the moving gear 4023 approaches the locking pawl 502, abuts and rotates the locking pawl 502, stretches the return spring 503, and one end of the rotating locking pawl 502 moves away from the positioning ratchet 504, releasing the lock on the positioning ratchet 504, thereby unlocking the first driven gear 4024; at this time, the continuing to rotate moving gear 4023 drives the transmission rod 601 at the bottom to rotate through the meshing first driven gear 4024;

[0061] The rotating transmission rod 601 drives the stratified sampling mechanism 2 to operate. Specifically, the rotating transmission rod 601 drives the guide rail groove wheel 201 to rotate. When the guide rail inside the guide rail groove wheel 201 rotates to the maximum radius position, the moving block 202 pushes the opening and closing linkage 203 to move outward. The outwardly moving opening and closing linkage 203 pushes the opening and closing valve plate 205 to move out of the sampling port 701 through the filter screen 204 at one end, opening the sampling port 701. The water sample enters the sampling tube 7 through the filter screen 204. During this process, the in-situ detection mechanism 3 will not be activated to ensure that the water sample is not contaminated by the detection equipment.

[0062] After sampling is completed, continue to rotate the guide rail groove wheel 201 so that the guide rail inside the guide rail groove wheel 201 rotates to the minimum radius position. At this time, the moving block 202 pulls the opening and closing linkage 203 to move inward. The inwardly moved opening and closing linkage 203 pulls the opening and closing valve plate 205 to reset through the filter screen 204 at one end, and automatically closes the sampling port 701 to achieve sealing.

[0063] During the drilling process, the detection probe 304 is in a retracted and sealed state. After reaching the target depth, the drive conversion mechanism 4 switches to the sampling drive mode. The servo motor 401 reverses the drive conversion component 402 and transmits the power to the worm gear 605. Specifically, the servo motor 401 drives the active gear 4021 to rotate in the opposite direction. The reverse-rotating active gear 4021 drives the meshed moving gear 4023 to rotate. At the same time, the moving gear 4023 moves along the slide rail frame 4022 via the slider 4026 to the other end inside the slide rail frame 4022, so that the moving gear 4023 meshes with the second driven gear 4025. At this time, the unlocking abutment wheel 505 on the top of the moving gear 4023 moves away from the locking pawl 502. The reset force of the reset spring 503 drives the locking pawl 502 to reset, locking the positioning ratchet 504 and keeping the opening and closing valve plate 205 closed to prevent water sample from entering the sampling chamber and causing contamination during the detection process.

[0064] The continuously rotating moving gear 4023 drives the meshing second driven gear 4025 to rotate. The rotating second driven gear 4025 drives the worm 605 to rotate. The rotating worm 605 drives the meshing worm wheel 604 to rotate forward, which drives the linkage gear 603 to rotate through the shaft. The rotating linkage gear 603 drives the meshing gear disc sleeve 602 to move downward. The moving gear disc sleeve 602 drives the meshing transmission gear 301 to rotate forward, which drives the reciprocating screw 302 to rotate forward. The screw sleeve seat 303 converts the rotational force of the reciprocating screw 302 into linear motion, which drives the detection probe 304 to move outward. The outwardly moving detection probe 304 drives the sealing valve plate 305 to extend out of the detection port on the inner wall of the drill pipe 1 through the detection control rod 306, thereby opening the detection port and allowing the detection end of the detection probe 304 to contact the groundwater for detection.

[0065] After the detected medium has completed its reaction, the rotating worm 605 drives the meshing worm wheel 604 to rotate in the opposite direction. This drives the linkage gear 603 to rotate in the opposite direction via the shaft. The rotating linkage gear 603 drives the meshing gear disc sleeve 602 to move upward. The moving gear disc sleeve 602 drives the meshing transmission gear 301 to rotate in the opposite direction, which in turn drives the reciprocating screw 302 to rotate in the opposite direction. The screw sleeve seat 303 converts the rotational force of the reciprocating screw 302 into linear motion, causing the screw sleeve seat 303 to move the detection probe 304 inward. At the same time, the detection control rod 306 drives the sealing valve plate 305 to reset to the detection port on the inner wall of the drill pipe 1, thus realizing the in-situ detection of groundwater pollution characteristic indicators.

[0066] like Figures 2 to 4As shown, the drill pipe 1 has equidistant air-filled slots 103 on its outer side, and a packer 101 is fitted onto the outer side of each air-filled slot 103. A drill bit 102 is fixedly installed at the bottom end of the drill pipe 1. An air-filling assembly 104 is provided on the inner wall of the drill pipe 1. The air-filling assembly 104 consists of an air-filling chamber 1041 and an air-filling valve pipe 1042. The air-filling chamber 1041 is located on the inner wall of the drill pipe 1, and one end of the air-filling valve pipe 1042 is connected to the air-filling chamber 1041. The other end of the air-filling valve pipe 1042 passes through the air-filled slot 103 and is connected to the packer 101. A three-way valve is provided at the connection end between the air-filling valve pipe 1042 and the air-filled slot 103, and the amount of gas inside the packer 101 is controlled by the three-way valve. The inflation chamber 1041 is connected to an external inflation device via a pipeline. Air is then injected into the inflation chamber 1041 through the external inflation device, and the air inside the inflation chamber 1041 is transported to the inflation tank 103 through the inflation valve pipe 1042, causing the inflation tank 103 to expand. This causes the packer 101 to expand outwards. Multiple expanding inflation tanks 103 effectively seal the inner walls of the detection holes at different depths around the drill pipe 1, separating water samples at different depths and preventing mixing, thus ensuring the purity and accuracy of the water samples. During device recovery, the gas inside the packer 101 is discharged through a three-way valve, causing the packer 101 to retract and release the seal on the inner wall of the detection hole, facilitating device recovery.

[0067] like Figure 9 As shown, the detection control rod 306 consists of a sleeve and two control rods. The sleeve is fixedly fitted onto one end of the outer side of the detection probe 304. One end of each of the two control rods is fixedly installed on one side of the sleeve, and the other end of each control rod is fixedly connected to the sealing valve plate 305. The fixed connection between the other end of each control rod and the sealing valve plate 305 allows the moving detection probe 304 to drive the two control rods to move through the sleeve, directly controlling the position of the sealing valve plate 305 and thus controlling the opening and closing of the sealing valve plate 305 and the detection port.

[0068] Based on the explanations and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. An integrated device for in-situ detection and stratified sampling of groundwater pollution, comprising a drill pipe (1), a stratified sampling mechanism (2), and an in-situ detection mechanism (3), characterized in that, It also includes a layered sampling tube group fixedly installed inside the drill pipe (1). The layered sampling tube group consists of multiple sampling tubes (7) arranged vertically, and each sampling tube (7) has a sampling port (701) on the top of its front side. Each sampling tube (7) is provided with a first mounting plate (8) above it, and the first mounting plate (8) is fixedly installed on the inner wall of the drill pipe (1). Each first mounting plate (8) is provided with a second mounting plate (9) above it, and the second mounting plate (9) is fixedly installed on the inner wall of the drill pipe (1). A mechanical linkage mechanism (6) is fixedly installed between the first mounting plate (8) and the second mounting plate (9). The mechanical linkage mechanism (6) consists of a transmission rod (601), a gear sleeve (602), a linkage gear (603), a worm gear (604), and a worm (605). The gear sleeve (602) is movably sleeved on the outside of the transmission rod (601), and the gear sleeve (602) meshes with the linkage gear (603). One side of the linkage gear (603) is fixedly connected to one side of the worm gear (604) through a shaft. The other side of the linkage gear (603) and the other side of the worm gear (604) are mounted on the top of the first mounting plate (8) through a bearing seat. The worm (605) is rotatably mounted on the top of the first mounting plate (8), and the worm gear (604) meshes with the worm (605). The inner wall of the drill pipe (1) is provided with a detection port, and the in-situ detection mechanism (3) is fixedly installed at the bottom of the first mounting plate (8); the in-situ detection mechanism (3) consists of a transmission gear (301), a reciprocating screw (302), a screw sleeve seat (303), a detection probe (304), a sealing valve plate (305), and a detection control rod (306). The transmission gear (301) is fixedly installed at the bottom of the first mounting plate (8) through a bearing seat. The transmission gear (301) and the gear plate sleeve (60) are connected. 2) Meshing connection: one end of the reciprocating screw (302) is fixedly connected to one end of the transmission gear (301), the threaded sleeve (303) is threaded onto the outside of the reciprocating screw (302), the detection probe (304) is fixedly installed at the bottom of the threaded sleeve (303), one end of the detection control rod (306) is sleeved onto the outside of the detection probe (304), and the other end of the detection control rod (306) is fixedly connected to the sealing valve plate (305), and the sealing valve plate (305) extends movably into the detection port; The layered sampling mechanism (2) is movably installed inside the sampling tube (7); the layered sampling mechanism (2) consists of a guide rail groove wheel (201), a moving block (202), an opening and closing connecting rod (203), a filter screen (204), and an opening and closing valve plate (205). The guide rail groove wheel (201) is fixedly installed at the bottom end of the transmission rod (601), and the moving block (202) is fixedly installed at one end of the opening and closing connecting rod (203). The opening and closing connecting rod (203) is movably connected to the guide rail groove wheel (201) through the moving block (202); one side of the filter screen (204) is fixedly installed at the other end of the opening and closing connecting rod (203), and the opening and closing valve plate (205) is fixedly installed at the other side of the filter screen (204). The filter screen (204) and the opening and closing valve plate (205) are movably installed inside the sampling port (701). A drive conversion mechanism (4) is rotatably mounted on the top of the second mounting plate (9). The drive conversion mechanism (4) consists of a servo motor (401) and a conversion component (402). The servo motor (401) is fixedly mounted on the bottom of the second mounting plate (9), and the output end of the servo motor (401) is connected to the conversion component (402) in a transmission connection. The conversion component (402) is connected to the transmission rod (601) and the worm gear (605) in a transmission connection. A locking mechanism (5) is fixedly mounted on the top of the second mounting plate (9). The locking mechanism (5) is splinedly connected to the conversion component (402). After the entire device is drilled to the target depth, the forward rotation of the servo motor (401) drives the conversion component (402) to transmit power to the transmission rod (601). The rotation of the transmission rod (601) drives the guide rail groove wheel (201) to rotate. When the guide rail inside the guide rail groove wheel (201) rotates to the maximum radius position, the moving block (202) pushes the opening and closing linkage (203) to move outward. The outwardly moved opening and closing linkage (203) pushes the opening and closing valve plate (205) to move out of the sampling port through the filter screen (204) at one end. Inside 701), open the sampling port (701), and the water sample enters the sampling tube (7) through the filter screen (204); after sampling is completed, continue to rotate the guide rail groove wheel (201) so that the guide rail inside the guide rail groove wheel (201) rotates to the minimum radius position. At this time, the opening and closing linkage (203) is pulled inward by the moving block (202). The inwardly moved opening and closing linkage (203) pulls the opening and closing valve plate (205) to reset through the filter screen (204) at one end, and automatically closes the sampling port (701) to achieve sealing. During the drilling process, the detection probe (304) is in a retracted and sealed state. After reaching the target depth, the servo motor (401) drives the conversion component (402) to transmit power to the worm gear (605). The worm gear (605) drives the meshing worm wheel (604) to rotate in both directions. This drives the linkage gear (603) to rotate in both directions via the shaft. The rotating linkage gear (603) drives the meshing gear disc sleeve (602) to move vertically back and forth. The downward-moving gear disc sleeve (602) drives the meshing transmission gear (301) to rotate in both directions, which in turn drives the reciprocating screw (302) to rotate in both directions. The reciprocating screw is then rotated through the screw sleeve seat (303). The rotational force of the rod (302) is converted into linear motion, which drives the detection probe (304) to extend and retract. The outwardly moving detection probe (304) drives the sealing valve plate (305) to extend out of the detection port on the inner wall of the drill pipe (1) through the detection control rod (306), thereby opening the detection port and allowing the detection end of the detection probe (304) to contact the groundwater for detection. After the detection medium has completed the reaction, the threaded seat (303) drives the detection probe (304) to retract and move back. At the same time, the sealing valve plate (305) is reset to the detection port on the inner wall of the drill pipe (1) through the detection control rod (306), thereby realizing the in-situ detection of groundwater pollution characteristic indicators. During testing, the locking mechanism (5) locks the transmission rod (601) to keep the opening and closing valve plate (205) closed; during sampling, the locking mechanism (5) is unlocked and the corresponding opening and closing valve plate (205) is opened through the transmission rod (601) to realize the orderly switching between testing and sampling.

2. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 1, characterized in that: The conversion assembly (402) consists of a drive gear (4021), a slide rail (4022), a moving gear (4023), a first driven gear (4024), a second driven gear (4025), and a slider (4026). The drive gear (4021) is fixedly mounted on the output end of the servo motor (401). The slide rail (4022) is fixedly mounted on the top of the second mounting plate (9). The slider (4026) is movably mounted inside the slide rail (4022). The moving gear (4023) is rotatably mounted on the top of the slider (4026). The gear (4023) moves along the slide rail frame (4022) via the slider (4026); the first driven gear (4024) and the second driven gear (4025) are symmetrically distributed on the outside of the slide rail frame (4022), and the first driven gear (4024) and the second driven gear (4025) are rotatably mounted on the top of the second mounting plate (9), wherein the driving gear (4021) is meshed with the moving gear (4023), and the moving gear (4023) is dynamically meshed with the first driven gear (4024) and the second driven gear (4025).

3. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 2, characterized in that: The top of the moving gear (4023) and the first driven gear (4024) are provided with spline holes, and the bottom end of the second driven gear (4025) is fixedly connected to the top end of the worm (605) through a connecting plate.

4. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 1, characterized in that: The locking mechanism (5) consists of a mounting bracket (501), a locking pawl (502), a return spring (503), a positioning ratchet (504), and an unlocking abutment wheel (505). The mounting bracket (501) is fixedly mounted on the top of the second mounting plate (9). One end of the locking pawl (502) is mounted on the bottom of the mounting bracket (501) via a pivot. One end of the return spring (503) is fixedly mounted on the top of the locking pawl (502), and the other end of the return spring (503) is fixedly mounted on one side of the mounting bracket (501).

5. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 4, characterized in that: The bottom of the positioning ratchet (504) and the unlocking abutment wheel (505) are both fixedly equipped with spline rods. The bottom of the positioning ratchet (504) is inserted into the spline hole at the top of the first driven gear (4024) through the spline rod, and the positioning ratchet (504) is dynamically engaged with the locking pawl (502). The bottom of the unlocking abutment wheel (505) is inserted into the spline hole at the top of the moving gear (4023) through the spline rod, so that the unlocking abutment wheel (505) moves with the moving gear (4023).

6. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 1, characterized in that: The drill pipe (1) has equidistant air-filled grooves (103) on its outside. Each air-filled groove (103) is fitted with a packer (101) on its outside. A drill bit (102) is fixedly installed at the bottom end of the drill pipe (1).

7. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 1, characterized in that: The inner wall of the drill pipe (1) is provided with an inflation assembly (104). The inflation assembly (104) consists of an inflation chamber (1041) and an inflation valve pipe (1042). The inflation chamber (1041) is located on the inner wall of the drill pipe (1), and one end of the inflation valve pipe (1042) is connected to the inflation chamber (1041). The other end of the inflation valve pipe (1042) passes through the inflation groove (103) and is connected to the packer (101).

8. The integrated device for in-situ detection and stratified sampling of groundwater pollution according to claim 1, characterized in that: The detection control rod (306) consists of a sleeve and two control rods. The sleeve is fixedly fitted onto one end of the outer side of the detection probe (304). One end of each of the two control rods is fixedly installed on one side of the sleeve, and the other end of each control rod is fixedly connected to the sealing valve plate (305).

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