An efficient groundwater stratification sampling device

Abstract

The invention belongs to the technical field of groundwater sampling equipment, and discloses an efficient groundwater stratified sampling device, comprising a frame, wherein the frame is provided with an operating table and a lifting device, wherein the lifting device is connected with a plurality of sampling devices along a height direction, wherein the sampling device comprises a sampling barrel, wherein the sampling barrel is provided with a plurality of water inlets along a circumferential direction, wherein the sampling barrel is rotatably connected with a plurality of rotating plates along a circumferential direction, wherein the rotating plates correspond to the water inlets one by one, and wherein the rotating plates are fastened with a retractable push-pull rod; wherein a driving assembly is provided at the top of the sampling barrel, wherein the driving assembly is rotatably connected with the free end of the push-pull rod, and wherein the driving assembly is used for driving the push-pull rod to rotate toward or away from the sampling barrel; wherein a sealing member is connected with a side of the rotating plate close to an outer wall of the sampling barrel; wherein a controller for controlling the operation of the driving assembly is provided at the operating table; wherein the invention solves the problems that the existing water taking device is prone to cause cross-mixing of water bodies at different depths, has low sampling efficiency, and is prone to blockage of water inlets.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater sampling equipment, in particular to a highly efficient groundwater stratified sampling device. Background Art

[0002] Groundwater refers to water stored in the rock voids below the ground. In a narrow sense, it refers to water in saturated aquifers below the groundwater surface. In the national standard "Hydrogeological Terminology" (GB / T 14157-93), groundwater refers to various forms of gravity water buried below the surface. Because groundwater has a stable amount of water and good water quality, it is one of the important water sources for agricultural irrigation, industrial mining and urban water use. However, due to the continuous discharge of industrial and domestic wastewater, the water quality of groundwater has a certain impact, so regular testing of groundwater is very important. In the process of sampling and testing groundwater, it is necessary to sample the water body at different depths to analyze the water quality of each layer of the water body.

[0003] When existing groundwater stratification sampling devices are used to sample water bodies at different depths, most of them use ropes to place the sampling equipment in the water. Only sample water of one depth can be sampled at a time, and the sampling efficiency is low. Moreover, the sampling devices are mostly in a normally open state. When going down to sample deep water, the sampling equipment will be submerged by the upper water, resulting in cross-mixing of the sample water. The sampling accuracy is low, and larger debris in the water can easily flow into the sampling tube, resulting in low quality of the sample water and easy blockage of the water inlet. Summary of the invention

[0004] The present invention aims to provide an efficient groundwater stratification sampling device, which solves the problems of existing water-taking devices that easily lead to cross-mixing of water bodies at different depths, low sampling efficiency, and easy clogging of water inlets.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A highly efficient groundwater stratified sampling device comprises a frame, wherein the frame is connected to an operating table and a lifting device; the lifting device is connected to a plurality of sampling devices along a height direction, the sampling device comprises a sampling barrel, the sampling barrel is provided with a plurality of water inlets along a circumferential direction, the sampling barrel is rotatably connected to a plurality of rotating plates along a circumferential direction, the rotating plates correspond to the water inlets one by one, and the rotating plates are fastened to a retractable push-pull rod; a driving assembly is provided on the top of the sampling barrel, the driving assembly is rotatably connected to the free end of the push-pull rod, and the driving assembly drives the push-pull rod to rotate the rotating plate toward and / or away from the sampling barrel; a sealing member is connected to a side of the rotating plate close to the outer wall of the sampling barrel; the operating table is provided with a controller for controlling the operation of the driving assembly.

[0007] Furthermore, the driving assembly includes a first motor fixedly connected to the sampling tube, the first motor is wirelessly connected to the controller, the output shaft of the first motor is fixedly connected to a screw, the top of the sampling tube is connected to a guide sleeve, the screw is slidably connected to a wire seat, the wire seat is fastened to a sliding sleeve, the sliding sleeve is slidably connected to the guide sleeve, and the sliding sleeve is rotatably connected to the push-pull rod.

[0008] Furthermore, the guide sleeve is provided with a sliding groove, the inner side wall of the sliding sleeve is connected with a sliding block, and the sliding block is slidably arranged on the inner side of the sliding groove.

[0009] Furthermore, the guide sleeve is provided with a sensor, and the sensor is wirelessly connected to the controller.

[0010] Furthermore, the push-pull rod includes a telescopic rod fastened to the rotating plate, the telescopic rod is slidably connected to a telescopic sleeve, a spring is arranged in the telescopic sleeve, one end of the spring is connected to the telescopic sleeve, and the other end of the spring is connected to an end of the telescopic rod away from the rotating plate.

[0011] Furthermore, the telescopic rod is connected to a guide rail, the telescopic sleeve is provided with a guide groove, and the guide rail is slidably connected in the guide groove.

[0012] Furthermore, the sealing member is a hemispherical rubber, and the diameter of the sealing member is matched with the diameter of the water inlet.

[0013] Furthermore, the sampling tube is connected to a tube core tube along the axial direction, the tube core tube is connected to a screw rod through a thread, and the screw rod is connected to the lifting device.

[0014] Furthermore, the lifting device includes a winding drum, a bracket and a second motor, the winding drum is rotatably connected to the frame, the free end of the bracket is connected to a pulley, the winding drum is connected to a rope, and the free end of the rope is connected to the sampling device through the pulley.

[0015] Furthermore, the bracket includes a first bracket, the first bracket is detachably connected to a second bracket, and the second bracket is a telescopic cylinder or an electric telescopic rod.

[0016] The principle and beneficial effects of the technical solution are:

[0017] 1. The present invention provides an efficient groundwater stratification sampling device, wherein a vehicle frame is used to install a lifting device and transport components to a sampling position; the lifting device is used to place the sampling device into a specified depth and lift it to the ground after sampling is completed; the lifting device is connected to a plurality of groups of sampling devices, and water samples of different depths can be taken at one time, thereby increasing sampling efficiency and saving resources; a sampling tube is provided with a plurality of water inlets along the circumference, and the sampling tube is connected with a plurality of rotating plates along the circumference, the rotating plates correspond to the water inlets one by one, a sealing member is connected to the inner side of the rotating plate at a position corresponding to the water inlet, and a retractable push-pull rod is fastened to the rotating plate The free end of the push-pull rod is rotatably connected to the driving assembly; the controller controls the driving assembly to work, and the driving assembly drives the free end of the push-pull rod to rotate in a direction away from the sampling barrel, that is, the free end of the push-pull rod rotates toward the top wall away from the sampling barrel, and the push-pull rod drives the rotating plate to rotate in a direction close to the outer wall of the sampling barrel until it is close to the outer wall of the sampling barrel, and the sealing member seals the water inlet; the driving assembly drives the free end of the push-pull rod to rotate in a direction close to the sampling barrel, that is, the free end of the push-pull rod rotates toward the top wall close to the sampling barrel, and the push-pull rod drives the rotating plate to rotate in a direction away from the outer wall of the sampling barrel, and the sealing member is separated from the water inlet.

[0018] In this way, when the sampling tube is stationary or moves downward or upward in the water, the rotating plate is in close contact with the outer wall of the sampling tube, and the sealing member seals the water inlet, which can prevent water from entering the sampling tube at other depths, avoid cross-mixing of water bodies, and improve sampling accuracy; when the sampling tube is placed at a specified depth to start sampling, the rotating plate rotates in a direction away from the sampling tube to push away debris around the sampling tube, thereby improving the quality of sample water and avoiding blockage of the water inlet; the rotating plate rotates in a direction close to the outer wall of the sampling tube, which can increase the speed at which water flows into the sampling tube, further improving sampling efficiency;

[0019] 2. The present invention provides an efficient groundwater stratification sampling device, in which a driving assembly adopts a screw rod, a screw seat, a first motor, and a sliding sleeve to cooperate with each other, and can simultaneously drive a plurality of push-pull rods to slide along the axial direction of the sampling tube, and the installation and operation are convenient, the force is evenly distributed, and the service life is long; specifically, the motor drives the screw rod to rotate, and the screw rod drives the screw seat to slide up (down) along the axial direction of the sampling tube, and the screw seat drives the sliding sleeve to slide up (down), and the sliding sleeve drives the push-pull rod to slide up (down) away from the end of the rotating plate, thereby driving the rotating plate to rotate toward (away from) the outer wall of the sampling tube, so that the water inlet can be opened or closed, and the surrounding debris can be pushed away; the slider is slidably connected in the slide groove, so that the sliding sleeve can slide along the axial direction of the guide sleeve, and the sliding is smoother while guiding, thereby further increasing the sampling efficiency;

[0020] 3. The present invention provides an efficient groundwater stratification sampling device, in which the push-pull rod adopts a telescopic sleeve, a telescopic rod and a spring to cooperate with each other, which is easy to install and operate, and the pulling force of the spring can make the rotating plate fit closely with the sampling tube, reduce the force on the screw thread, and increase the service life of the parts; and when the rotating plate rotates, it can also play a buffering role; specifically, when the rotating plate is in close contact with the outer wall of the sampling tube, the spring is in an elongated state, and the spring applies a force toward the center of the sampling tube to the rotating plate through the telescopic rod, so that the rotating plate fits the sampling tube more closely, which can avoid the water resistance from separating it from the sampling tube during the downward movement, and reduce the force on the screw thread; the setting of the guide rail and the guide groove can prevent the telescopic rod and the telescopic sleeve from twisting, thereby preventing the spring from twisting and increasing the service life of the spring;

[0021] 4. The present invention provides an efficient groundwater stratified sampling device, which uses hemispherical rubber as a sealing member, which can better fit the water inlet, and the maximum diameter of the rubber can be slightly larger than the diameter of the water inlet. When the rotating plate rotates toward the outer wall of the sampling tube, the hemispherical rubber can be gradually inserted into the water inlet, and the connection between the sealing member and the water inlet is gradually tightened, further increasing the sealing effect;

[0022] 5. The present invention provides an efficient groundwater stratification sampling device, in which the sampling tube is threadedly connected to the screw rod through a tube core tube, and a plurality of sampling tubes can be installed on the threaded rod, and the intervals between adjacent sampling tubes can be adjusted. In actual use, the distance between the sampling tubes on the screw rod can be adjusted by rotating the sampling tube or the screw rod according to different sampling depths, thereby further increasing the sampling efficiency and being easy to operate. The lifting device adopts a second motor, a winding drum, a bracket and a pulley to cooperate, and the lifting is stable, the operation is simple and the efficiency is high. The bracket includes a first bracket and a second bracket, and the two brackets are detachably connected, and the angle between the first bracket and the second bracket can be adjusted, and the second bracket is retractable, so that water samples at different distances from the shore can be taken as needed, and the applicability is wide. A sensor is arranged on the sliding sleeve, and when the thread seat slides upward and touches the sensor, the sensor transmits a signal to the controller, and the controller controls the first motor to rotate in the opposite direction, thereby realizing the reciprocating rotation of the rotating plate, pushing away debris in real time during the water extraction process and increasing the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an efficient groundwater stratification sampling device of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a sampling device of an efficient groundwater stratification sampling device of the present invention;

[0025] Figure 3 It is a front view of an efficient groundwater stratification sampling device of the present invention;

[0026] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0027] Figure 5 for Figure 4 A partial enlarged schematic diagram of point C in the middle;

[0028] Figure 6 It is a schematic structural diagram of a rotating plate and a push-pull rod of an efficient groundwater stratification sampling device of the present invention;

[0029] Figure 7 It is a partial schematic diagram of an efficient groundwater stratified sampling device of the present invention;

[0030] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at B;

[0031] The names of the corresponding marks in the accompanying drawings are:

[0032] Frame 1, operating table 12, second motor 13, winding drum 14, first bracket 15, pulley 151, second bracket 16, fixed end 161, telescopic end 162, rope 17, sampling tube 2, cylindrical section 21, water inlet 211, conical section 22, end cover 221, guide sleeve 23, slide groove 231, tube core tube 24, hollow shell 3, rotating plate 4, seal 41, screw 5, lifting ring 51, drive assembly 6, first motor 61, screw 62, screw seat 63, sliding sleeve 64, slider 641, push-pull rod 7, telescopic rod 71, connecting pipe 711, guide rail 712, telescopic sleeve 72, guide groove 721, spring 73, sensor 8. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0034] like Figures 1 to 8 As shown, an efficient groundwater stratified sampling device comprises a frame 1, the frame 1 is provided with an operating table 12 and a lifting device, the operating table 12 is provided with a controller for controlling the operation of a driving assembly 6, the lifting device comprises a winding drum 14, a bracket and a second motor 13, the winding drum 14 is rotatably connected to the frame 1, the second motor 13 is used to drive the winding drum 14 to rotate, the bracket comprises a first bracket 15 and a second bracket 16, the second bracket 16 is a telescopic cylinder or an electric telescopic rod, a fixed end 161 of the second bracket 16 is detachably connected to the first bracket 15 by bolts, a telescopic end 162 of the second bracket 16 is connected to a pulley 151, a free end of the first bracket 15 is connected to the pulley 151, the winding drum 14 is connected to a rope 17, the free end of the rope 17 is connected to a plurality of groups of sampling devices along the height direction through the pulley 151, and the plurality of groups of sampling devices are connected by a screw 5;

[0035] The sampling device includes a sampling barrel 2, the center of the sampling barrel 2 is connected to a barrel core tube 24 along the axial direction, the barrel core tube 24 is connected to the screw rod 5 through a thread, the screw rod 5 is connected to the rope 17 of the lifting device through a ring 51 arranged on the screw rod 5, wherein the sampling barrel 2 includes a cylindrical section 21 and a conical section 22, the bottom end of the conical section 22 is detachably connected to an end cap 221 for easy water discharge; the sampling barrel 2 is provided with a plurality of water inlets 211 along the circumferential direction, and the top edge of the sampling barrel 2 is rotatably connected to a plurality of rotating plates 4 along the circumferential direction, the rotating plates 4 correspond to the water inlets 211 one by one, and the rotating plate 4 is connected to a side close to the outer wall of the sampling barrel 2 The seal 41 is a hemispherical rubber, and the diameter of the seal 41 is adapted to the diameter of the water inlet 211; the rotating plate 4 is fastened with a retractable push-pull rod 7; the push-pull rod 7 includes a telescopic rod 71 fastened with the rotating plate 4, the telescopic rod 71 is fixedly connected to the rotating plate 4 through a connecting tube 711, and the angle between the telescopic rod 71 and the rotating plate 4 can be set according to actual conditions, such as 120°, 150°, 170°, etc.; the connecting tube 711 is rotatably connected to the sampling tube 2, and the telescopic rod 71 is slidably connected with a telescopic sleeve 72, and a spring 73 is arranged in the telescopic sleeve 72, and one end of the spring 73 is connected to the telescopic sleeve 72. The sleeve 72 is connected, and the other end of the spring 73 is connected to the end of the telescopic rod 71 away from the rotating plate 4; the telescopic rod 71 is connected to the guide rail 712, and the telescopic sleeve 72 is provided with a guide groove 721, and the guide rail 712 is slidably connected in the guide groove 721; a driving assembly 6 is provided at the top of the sampling cylinder 2, and the driving assembly 6 is used to drive the end of the push-pull rod 7 away from the rotating plate to rotate in a direction away from or close to the sampling cylinder 2. In this embodiment, the driving assembly 6 includes a screw rod 62 rotatably connected to the sampling cylinder 2 and a first motor 61 for driving the screw rod 62 to rotate. The first motor 61 is wirelessly connected to the controller, and the top of the sampling cylinder 2 is connected It is connected to a guide sleeve 23, a screw rod 62 is slidably connected to a screw seat 63, the screw seat 63 is firmly connected to a sleeve 64, the sleeve 64 is slidably connected to the guide sleeve 23, and the sleeve 64 is rotatably connected to the end of the push-pull rod 7 away from the rotating plate 4; the guide sleeve 23 is provided with a slide groove 231, the inner wall of the slide sleeve 64 is connected to a slider 641, and the slider 641 is connected to the slide groove 231; the guide sleeve 23 is provided with a sensor 8, and the sensor 8 is wirelessly connected to the controller; a hollow shell 3 can be connected to the top of the sampling tube 2 to cover and shield the drive assembly 6; a sensor 8 is provided in the sampling tube 2, and the sensor 8 is connected to the controller.

[0036] The specific implementation process is as follows:

[0037] When using the device of the present invention to draw water, the distance between multiple sampling tubes 2 is adjusted according to the water drawing depth, and the sampling tube 2 is placed in the water to the required depth using the lifting device. The controller controls the first motor 61 to start, and the rotating plate 4 slowly rotates in the direction away from the outer wall of the sampling tube 2 to push away the debris, and the reciprocating cycle is repeated multiple times until the required amount of water is drawn. The sensor 8 transmits a signal to the controller, and the controller controls the motor to rotate the rotating plate 4 in the direction close to the outer wall of the sampling tube 2. The seal 41 seals the water inlet 211, and then the lifting device is used to lift the sampling device to the ground.

[0038] When the sampling tube 2 is stationary or moves downward or upward in the water, the rotating plate 4 is in close contact with the outer wall of the sampling tube 2, and the sealing member 41 seals the water inlet 211, which can prevent water from other depths from entering the sampling tube 2, avoid cross-mixing of water bodies, and improve sampling accuracy; when the sampling tube 2 is placed at a specified depth and starts sampling, the rotating plate 4 rotates in a direction away from the sampling tube 2 to push away debris around the sampling tube 2, thereby improving the quality of the sample water and avoiding blockage of the water inlet 211. The rotating plate 4 rotates in a direction close to the outer wall of the sampling tube 2, which can increase the speed at which water flows into the sampling tube 2 and improve sampling efficiency;

[0039] The first motor 61 drives the screw rod 62 to rotate, and the screw rod 62 drives the wire seat 63 to slide upward (downward) along the axis of the sampling tube 2, and the wire seat 63 drives the sliding sleeve 64 to slide upward (downward), and the sliding sleeve 64 drives the push-pull rod 7 to slide upward (downward) away from the end of the rotating plate 4, thereby driving the rotating plate 4 to rotate toward (away from) the outer wall of the sampling tube 2, so that the water inlet 211 can be opened or closed, and the surrounding debris can be pushed away; the slider 641 is slidably connected in the slide groove 231, so that the sliding sleeve 64 can slide along the axial direction of the guide sleeve 23, and the sliding is smoother while guiding, thereby improving the sampling efficiency;

[0040] The push-pull rod 7 adopts the cooperation of the telescopic sleeve 72, the telescopic rod 71 and the spring 73, which is easy to install and operate. The pulling force of the spring 73 can make the rotating plate 4 fit closely with the sampling tube 2, reduce the force on the thread of the screw rod 62, and increase the service life of the parts; and when the rotating plate 4 rotates, it can also play a buffering role; specifically, when the rotating plate 4 is in close contact with the outer wall of the sampling tube 2, the spring 73 is in an elongated state, and the spring 73 applies a force toward the center of the sampling tube 2 to the rotating plate 4 through the telescopic rod 71, so that the rotating plate 4 fits the sampling tube 2 more closely, which can avoid the water resistance separating it from the sampling tube 2 during the downward movement, and reduce the force on the thread of the screw rod 62; the setting of the guide rail 712 and the guide groove 721 can prevent the telescopic rod 71 and the telescopic sleeve 72 from twisting, thereby preventing the spring 73 from twisting and increasing the service life of the spring 73;

[0041] The hemispherical rubber is used as the sealing member 41, which can better fit with the water inlet 211, and the maximum diameter of the rubber can be slightly larger than the diameter of the water inlet 211. When the rotating plate 4 rotates toward the outer wall of the sampling tube 2, the hemispherical rubber can gradually be inserted into the water inlet 211, and the connection between the sealing member 41 and the water inlet 211 is gradually tightened, further improving the sealing effect;

[0042] The sampling tube 2 is threadedly connected to the screw 5 through the tube core tube 24, and a plurality of sampling tubes 2 can be installed on the screw 5, and the interval between adjacent sampling tubes 2 can be adjusted. In actual use, the distance between the sampling tube 2 on the screw 5 can be adjusted by rotating the sampling tube 2 or the screw 5 according to different sampling depths, thereby improving the sampling efficiency and being easy to operate; the lifting device adopts the cooperation of the second motor 13, the winding drum 14, the bracket and the pulley 151, and the lifting is stable, the operation is easy and the efficiency is high; the bracket includes a first bracket 15 and a second bracket 16, and the two brackets are detachably connected, and the angle between the first bracket 15 and the second bracket 16 can be adjusted, and the second bracket 16 is retractable, and water samples at different distances from the shore can be taken as needed, and the applicability is wide; a sensor 8 is arranged on the sliding sleeve 64, and when the wire seat 63 slides upward and touches the sensor 8, the sensor 8 transmits a signal to the controller, and the controller controls the first motor 61 to rotate in the opposite direction, thereby realizing the reciprocating rotation of the rotating plate 4, pushing away debris in real time during the water collection process and increasing the sampling efficiency.

[0043] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An efficient groundwater stratification sampling device, characterized in that: The invention comprises a vehicle frame (1), wherein the vehicle frame (1) is connected to an operating table (12) and a lifting device; the lifting device is connected to a plurality of sampling devices along a height direction, wherein the sampling devices comprise a sampling cylinder (2), wherein the sampling cylinder (2) is provided with a plurality of water inlets (211) along a circumferential direction, wherein the sampling cylinder (2) is rotatably connected to a plurality of rotating plates (4) along a circumferential direction, wherein the rotating plates (4) correspond to the water inlets (211) one by one, and wherein the rotating plates (4) are fastened to a retractable push-pull rod (7 A driving assembly (6) is arranged at the top of the sampling barrel (2); the driving assembly (6) is rotatably connected to the free end of the push-pull rod (7); the driving assembly (6) drives the push-pull rod (7) to rotate the rotating plate (4) towards and / or away from the sampling barrel (2); a sealing member (41) is connected to a side of the rotating plate (4) close to the outer wall of the sampling barrel (2); and the operating table (12) is provided with a controller for controlling the operation of the driving assembly (6).

2. An efficient groundwater stratification sampling device according to claim 1, characterized in that: The driving assembly (6) comprises a first motor (61) fixedly connected to the sampling tube (2); the first motor (61) is wirelessly connected to the controller; the output shaft of the first motor (61) is fixedly connected to a screw rod (62); the top of the sampling tube (2) is connected to a guide sleeve (23); the screw rod (62) is slidably connected to a wire seat (63); the wire seat (63) is fixedly connected to a sliding sleeve (64); the sliding sleeve (64) is slidably connected to the guide sleeve (23); and the sliding sleeve (64) is rotationally connected to the push-pull rod (7).

3. An efficient groundwater stratification sampling device according to claim 2, characterized in that: The guide sleeve (23) is provided with a sliding groove (231), the inner wall of the sliding sleeve (64) is connected with a sliding block (641), and the sliding block (641) is slidably arranged on the inner side of the sliding groove (231).

4. An efficient groundwater stratification sampling device according to claim 2, characterized in that: The guide sleeve (23) is provided with a sensor (8), and the sensor (8) is wirelessly connected to the controller.

5. An efficient groundwater stratification sampling device according to claim 1, characterized in that: The push-pull rod (7) comprises a telescopic rod (71) which is fixedly connected to the rotating plate (4); the telescopic rod (71) is slidably connected to a telescopic sleeve (72); a spring (73) is arranged inside the telescopic sleeve (72); one end of the spring (73) is connected to the telescopic sleeve (72); and the other end of the spring (73) is connected to an end of the telescopic rod (71) away from the rotating plate (4).

6. An efficient groundwater stratification sampling device according to claim 5, characterized in that: The telescopic rod (71) is connected to a guide rail (712), the telescopic sleeve (72) is provided with a guide groove (721), and the guide rail (712) is slidably connected in the guide groove (721).

7. An efficient groundwater stratification sampling device according to claim 1, characterized in that: The sealing member (41) is hemispherical rubber, and the diameter of the sealing member (41) is matched to the diameter of the water inlet (211).

8. An efficient groundwater stratification sampling device according to claim 1, characterized in that: The sampling cylinder (2) is connected to a cylinder core tube (24) along the axial direction, the cylinder core tube (24) is connected to a screw rod (5) via a thread, and the screw rod (5) is connected to the lifting device.

9. The efficient groundwater stratification sampling device according to claim 1, characterized in that: The lifting device comprises a wire drum (14), a bracket and a second motor (13); the wire drum (14) is rotatably connected to the frame (1); a free end of the bracket is connected to a pulley (151); the wire drum (14) is connected to a rope (17); and the free end of the rope (17) is connected to the sampling device via the pulley (151).

10. An efficient groundwater stratification sampling device according to claim 9, characterized in that: The bracket comprises a first bracket (15), the first bracket (15) being detachably connected to a second bracket (16), the second bracket (16) being a telescopic cylinder or a telescopic rod (71).

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