A sampling device for groundwater monitoring

Abstract

The application is suitable for the technical field of groundwater detection sampling, and provides a sampling device for groundwater monitoring, which comprises a support frame, both ends of the support frame are threadedly connected with positioning inserting rods, the lower side of the support frame is provided with a detection assembly, the detection assembly and the support frame are connected with a driving assembly, the driving assembly can drive the vertical movement of the detection assembly, and the detection assembly can be inserted into soil to measure the water content of the soil sample in the detection assembly and the lateral pressure of the soil sample on the detection assembly. The sampling device for groundwater monitoring can control the advancing speed of the thrust mechanism and the vibration frequency of the vibration mechanism through the measurement results of the detection assembly when the sampling cylinder is used for layered sampling of the soil sample, so as to improve the integrity and sampling efficiency of the soil sample sampling.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of groundwater detection sampling, and particularly relates to a sampling device for groundwater monitoring. BACKGROUND

[0002] Groundwater monitoring is a key link in environmental geology and hydrogeology research, and the sampling quality directly affects the accuracy of water quality analysis, pollution assessment and groundwater dynamic research. Traditional groundwater or soil sampling devices mostly use mechanical pressure or hammering method to push the sampler into the stratum, which is simple to operate, but easy to cause disturbance to the soil structure during sampling, especially for undisturbed soil and soft soil with high water content, which often leads to compression, water migration or layer confusion of the soil sample, seriously affecting the representativeness of the sample and the reliability of the test results.

[0003] At present, there are some improved sampling equipment on the market, such as static pressure or vibration assisted pressure, which can reduce the sampling resistance and soil disturbance to a certain extent. However, most of these devices lack real-time monitoring and feedback control system, and cannot dynamically adjust the sampling parameters (such as pressure speed and vibration frequency) according to the physical parameters of the soil layer (such as water content and lateral soil pressure), so there are still great limitations in sampling effect and adaptability under complex stratum or diversified soil conditions. In addition, most traditional samplers do not have the function of in-situ layering, and the soil sample is easy to mix and compact during sampling, especially not conducive to the collection of samples that need to preserve the original structure and water distribution.

[0004] Therefore, there is an urgent need for a sampling device for groundwater monitoring that can real-time perceive the state of the soil layer, has intelligent control function and can realize layered sampling, in order to improve the sampling quality and efficiency and meet the demand of environmental monitoring and scientific research for high-quality undisturbed soil samples. SUMMARY

[0005] The purpose of the embodiment of the application is to provide a sampling device for groundwater monitoring, which aims to solve the deficiencies of traditional sampling devices in layered sampling and real-time control.

[0006] The application is implemented as follows: a sampling device for groundwater monitoring, comprising a support frame, two ends of the support frame are threadedly connected with positioning insertion rods, a detection assembly is arranged on the lower side of the support frame, a driving assembly is connected between the detection assembly and the support frame, the driving assembly can drive the detection assembly to move vertically, the detection assembly can be inserted into the soil and measure the water content of the soil sample in the detection assembly and the lateral pressure of the soil sample on the detection assembly.

[0007] The sampling assembly is provided with a sampling cylinder, a plurality of air outlets are vertically arranged on the sampling cylinder, a thrust mechanism is arranged between the sampling cylinder and the support frame, the thrust mechanism can vertically move the sampling cylinder, a vibration mechanism is arranged at the bottom of the sampling cylinder, and the vibration mechanism can vibrate and advance into the soil;

[0008] A plurality of separation assemblies are vertically arranged in the sampling cylinder, and the separation assemblies can vertically separate the soil samples entering the sampling cylinder;

[0009] The regulating system can control the advancing speed of the thrust mechanism and the vibration frequency of the vibration mechanism through the measurement results of the detection assembly, and the regulating system can control the sampling cylinder to sample the soil sample by the layering compression method.

[0010] In a further technical solution, the detection assembly comprises a detection cylinder and a limiting block, the detection cylinder is fixedly connected with a guide rod, the guide rod is vertically and slidingly connected with the support frame, a plurality of rows of limiting blocks are equidistantly distributed on the inner wall of the detection cylinder, all the limiting blocks are slidingly connected with the inner wall of the detection cylinder, and an elastic push spring is arranged between each limiting block and the inner wall of the detection cylinder, a pressure sensor is arranged between the limiting block and the elastic push spring, and a humidity sensor is arranged on the surface of the limiting block.

[0011] In a further technical solution, the driving assembly comprises a first motor, a first gear sleeve, a first threaded rod and a first driving wheel.

[0012] The support frame is fixedly connected with the first motor, the output shaft of the first motor is fixedly connected with the first driving wheel, the upper portion of the support frame is rotatably connected with the first gear sleeve, the first gear sleeve is engaged with the first driving wheel, the first gear sleeve is threadedly connected with the first threaded rod, and the first threaded rod is fixedly connected with the detection assembly.

[0013] In a further technical solution, the thrust mechanism comprises a second motor, a second gear sleeve, a second threaded rod, a second driving wheel and a limiting sleeve.

[0014] The second motor is fixedly connected with the support frame, the output shaft of the second motor is fixedly connected with the second driving wheel, the upper end surface of the support frame is rotatably connected with the second gear sleeve, the second gear sleeve is engaged with the second driving wheel, the lower end surface of the support frame is fixedly connected with the limiting sleeve, the limiting sleeve is vertically and slidingly connected with the second threaded rod, the second threaded rod is threadedly connected with the second gear sleeve, and the sampling cylinder is fixedly connected with the lower end of the second threaded rod.

[0015] In a further technical solution, the vibration mechanism comprises a third motor, a connecting rod, a vibration sleeve, a connecting frame, a spring and a guide sleeve.

[0016] The mechanism cavity is fixedly connected with a third motor, the output shaft of the third motor is fixedly connected with a connecting rod, the upper end of the connecting frame is inserted into the connecting rod, the lower part of the spring is connected with the guide sleeve, the upper part of the spring is rotationally connected with the rotating seat in the connecting rod, the connecting frame is fixedly connected with a vibrating sleeve, and the vibrating sleeve is vertically slidably connected with the sampling cylinder.

[0017] The connecting frame is fixedly connected with the guide sleeve, the upper part of the guide sleeve is provided with a plurality of meshing teeth, and the upper part of the guide sleeve is meshed with the lower part of the connecting rod.

[0018] Further technical solutions, the separation assembly includes a ring sleeve, a separation cutting rod, an electromagnet and a magnetic ring.

[0019] The sampling cylinder is vertically provided with a chute along the inner side wall, a plurality of ring sleeves are vertically slidably connected in the chute, and a magnetic ring is fixedly arranged at the position close to the bottom of the chute.

[0020] The inner side of the ring sleeve is rotationally connected with a plurality of separation cutting rods, the separation cutting rods are embedded in the inner wall of the ring sleeve, a plastic film is connected between the separation cutting rods and the inner cavity of the ring sleeve, the side wall of the separation cutting rod is provided with a magnetic block, a plurality of electromagnets are arranged in the side wall of the ring sleeve, and the separation cutting rods are arranged on one side of an electromagnet.

[0021] Further technical solutions, the control system includes a data processor and a PLC controller, the data processor can record the pressure value of the pressure sensor and the humidity value of the humidity sensor in the detection assembly, and the data processor compares the pressure value of the pressure sensor and the humidity value of the humidity sensor with the preset pressure threshold value and humidity threshold value in the data processor respectively, and forms judgment information;

[0022] The PLC controller can control the thrust mechanism and the vibration mechanism according to the judgment information of the data processor.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] The sampling device for monitoring underground water provided by the present application drives the detection assembly to be vertically inserted into the soil and measures the water content of the soil sample in the detection assembly and the side pressure of the soil sample on the detection assembly; then the thrust mechanism can drive the sampling cylinder to be vertically inserted into the soil for sampling, the thrust mechanism drives the sampling cylinder to move intermittently, when the sampling cylinder is inserted by a certain depth, the separation assembly can vertically separate the soil sample entering the sampling cylinder at this time, so that the soil sample in the sampling cylinder is segmented and sampled, avoiding the extrusion and loosening of the soil sample, and avoiding the accumulation of water in the soil sample downward.

[0025] The sampling device for groundwater monitoring provided by the application can improve the integrity and sampling efficiency of soil sampling when the sampling cylinder samples the soil in layers, because the push mechanism and the vibration mechanism can be controlled by the measurement results of the detection assembly.

[0026] The sampling device for groundwater monitoring provided by the application can improve the stability of the sampling cylinder when sampling, because the detection cylinder can be inserted into the ground, and the outer wall of the detection cylinder is pressed and limited by the external soil sample. Meanwhile, the soil sample is elastically limited by the limiting block inside the detection cylinder, so that the lateral extrusion force of the detection cylinder on the soil sample is prevented from being too large to change the original density of the soil sample. Then, the lateral pressure of the soil sample in the detection assembly is measured by the pressure value of the pressure sensor, and the moisture content of the soil sample in the detection assembly is measured by the humidity value of the humidity sensor.

[0027] The sampling device for groundwater monitoring provided by the application can separate the soil sample on the upper side of the plastic film when the sampling cylinder is paused to press down on the soil sample, because the magnetic poles of all electromagnets on the uppermost ring are changed in direction by the control system, the uppermost ring is separated from the magnetic ring, and all the electromagnets on the uppermost ring push the separation cutting rod on one side thereof outward. Under the pushing force of the electromagnets, one end of all the separation cutting rods moves close to the connecting rod, and the separation cutting rods separate the soil sample. At this time, all the separation cutting rods drive the plastic film connected thereto to be unfolded, so as to separate the soil sample on the upper side of the plastic film. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is a structural schematic diagram of the application;

[0029] Figure 2 The figure is a structural schematic diagram of the push mechanism in the application;

[0030] Figure 3 The figure is a structural schematic diagram of the detection assembly in the application;

[0031] Figure 4 The figure is a structural schematic diagram of the internal structure of the sampling cylinder in the application;

[0032] Figure 5 The figure is a structural schematic diagram of the separation assembly in the application;

[0033] Figure 6 The figure is a structural schematic diagram of the vibration mechanism in the application.

[0034] In the attached diagram: 1. Support frame; 2. Detection assembly; 21. Detection cylinder; 22. Limiting block; 3. Drive assembly; 31. Motor No. 1; 32. Gear sleeve No. 1; 33. Threaded rod No. 1; 34. Drive wheel No. 1; 4. Thrust mechanism; 41. Motor No. 2; 42. Gear sleeve No. 2; 43. Threaded rod No. 2; 44. Drive wheel No. 2; 45. Limiting sleeve; 5. Sampling cylinder; 6. Vibration mechanism; 61. Motor No. 3; 62. Connecting rod; 63. Vibration sleeve; 64. Connecting frame; 65. Spring; 66. Guide sleeve; 7. Separating assembly; 71. Ring sleeve; 72. Separating cutter; 73. Electromagnet; 74. Magnetic ring; 8. Mechanism cavity; 9. Sampling cavity; 10. Guide rod; 11. Positioning rod; 12. Air outlet; 13. Slide groove. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0037] like Figures 1-6 As shown, a groundwater monitoring sampling device according to an embodiment of the present invention includes a support frame 1, both ends of which are threadedly connected to positioning rods 11. A detection component 2 is provided on the lower side of the support frame 1, and a driving component 3 is connected between the detection component 2 and the support frame 1. The driving component 3 can drive the detection component 2 to move vertically, and the detection component 2 can be inserted into the soil to measure the water content of the soil sample in the detection component 2 and the lateral pressure of the soil sample on the detection component 2.

[0038] The detection component 2 is provided with a sampling tube 5, which has multiple air outlets 12 arranged vertically. A thrust mechanism 4 is provided between the sampling tube 5 and the support frame 1. The thrust mechanism 4 can push the sampling tube 5 to move vertically. A vibration mechanism 6 is provided at the bottom of the sampling tube 5. The vibration mechanism 6 can vibrate and propel the tube into the soil.

[0039] The sampling tube 5 is vertically provided with multiple dividing components 7, which can vertically divide the soil sample entering the sampling tube 5.

[0040] The control system can control the propulsion speed of the thrust mechanism 4 and the vibration frequency of the vibration mechanism 6 through the measurement results of the detection component 2. The control system can also control the sampling tube 5 to sample the soil using the layered pressing method.

[0041] In this embodiment, the support frame 1 is fixed to the ground by positioning the insertion rod 11, and the support frame 1 is adjusted to be horizontal, the driving assembly 3 is started, the driving assembly 3 drives the detection assembly 2 to vertically downwardly insert into the soil and measure the water content of the soil sample in the detection assembly 2 and the lateral pressure of the soil sample on the detection assembly 2;

[0042] Then the thrust mechanism 4 is started, the thrust mechanism 4 can drive the sampling cylinder 5 to vertically insert into the soil for sampling, the thrust mechanism 4 drives the sampling cylinder 5 to intermittently move, when the sampling cylinder 5 inserts into the soil by a depth, the separation assembly 7 can vertically separate the soil sample in the sampling cylinder 5 at this time, so that the soil sample in the sampling cylinder 5 is segmented for sampling, so as to avoid the soil sample from being squeezed and loosened, and to avoid the water in the soil sample from accumulating downwardly;

[0043] When the sampling cylinder 5 samples the soil sample in layers, the control system can control the advancing speed of the thrust mechanism 4 and the vibration frequency of the vibration mechanism 6 according to the measurement results of the detection assembly 2, so as to improve the completeness and efficiency of the soil sample sampling, and the disturbance rate of the soil body can be effectively reduced by the phased pressure loading and real-time state monitoring, so as to meet the requirement of sampling the undisturbed soil.

[0044] As shown in Figure 3 As a preferred embodiment of the present application, the detection assembly 2 includes a detection cylinder 21 and a limiting block 22, the detection cylinder 21 is fixedly connected with a guide rod 10, the guide rod 10 is vertically slidably connected with the support frame 1, a plurality of rows of limiting blocks 22 are equidistantly distributed on the inner wall of the detection cylinder 21, all the limiting blocks 22 are slidably connected with the inner wall of the detection cylinder 21, and an elastic push spring is arranged between each limiting block 22 and the inner wall of the detection cylinder 21, a pressure sensor is arranged between the limiting block 22 and the elastic push spring, and a humidity sensor is arranged on the surface of the limiting block 22.

[0045] In this embodiment, when the detection cylinder 21 is inserted into the ground, the outer wall of the detection cylinder 21 is extruded and limited by the external soil sample, at this time, the stability of the sampling cylinder 5 during sampling can be improved by the detection cylinder 21, and meanwhile, the limiting block 22 elastically limits the soil sample on the inner side of the detection cylinder 21, so that the lateral extrusion force of the detection cylinder 21 on the soil sample is prevented from being too large to change the original density of the soil sample; then the lateral pressure of the soil sample in the detection assembly 2 outwardly is measured by the pressure value of the pressure sensor, and the water content of the soil sample in the detection assembly 2 is measured by the humidity value of the humidity sensor, the adhesion between the soil samples is judged by the lateral pressure of the soil sample in the detection assembly 2 outwardly and the water content of the soil sample in the detection assembly 2, and the advancing speed of the thrust mechanism 4 and the vibration frequency of the vibration mechanism 6 are controlled by the control system according to the adhesion between the soil samples.

[0046] As shown in Figure 1As shown, in a preferred embodiment of the present invention, the drive assembly 3 includes a first motor 31, a first gear sleeve 32, a first threaded rod 33, and a first drive wheel 34.

[0047] The support frame 1 is fixedly connected to a No. 1 motor 31. The output shaft of the No. 1 motor 31 is fixedly connected to a No. 1 drive wheel 34. The No. 1 gear sleeve 32 is rotatably connected to the support frame 1 through a bearing, thereby restricting its vertical movement and allowing only horizontal rotation. The No. 1 gear sleeve 32 meshes with the No. 1 drive wheel 34. The No. 1 gear sleeve 32 is threadedly connected to a No. 1 threaded rod 33. The No. 1 threaded rod 33 is fixedly connected to the detection component 2.

[0048] In this embodiment, the first motor 31 is started, which drives the first drive wheel 34 to rotate. The first drive wheel 34 drives the first gear sleeve 32 to rotate through meshing with the first gear sleeve 32. At this time, since the guide rod 10 guides and limits the detection component 2, and the detection component 2 is fixedly connected to the first threaded rod 33, under the threaded transmission of the first gear sleeve 32, the first threaded rod 33 drives the detection component 2 to move vertically downward and insert the detection component 2 into the soil.

[0049] like Figure 2 As shown, in a preferred embodiment of the present invention, the thrust mechanism 4 includes a second motor 41, a second gear sleeve 42, a second threaded rod 43, a second drive wheel 44, and a limiting sleeve 45.

[0050] The second motor 41 is fixedly connected to the support frame 1. The output shaft of the second motor 41 is fixedly connected to the second drive wheel 44. The upper end face of the support frame 1 is rotatably connected to the second gear sleeve 42, which meshes with the second drive wheel 44. The lower end face of the support frame 1 is fixedly connected to the limit sleeve 45, which is vertically slidably connected to the second threaded rod 43. The second threaded rod 43 is threadedly connected to the second gear sleeve 42. The sampling cylinder 5 is fixedly connected to the lower end of the second threaded rod 43.

[0051] In this embodiment, the second motor 41 is started, which drives the second drive wheel 44 to rotate. The second drive wheel 44 drives the second gear sleeve 42 to rotate. The limiting sleeve 45 vertically limits the second threaded rod 43. Under the threaded transmission of the second gear sleeve 42, the second threaded rod 43 moves vertically downward. The second threaded rod 43 drives the sampling cylinder 5 to be inserted into the soil sample. Changing the speed of the second motor 41 can adjust the insertion speed of the sampling cylinder 5.

[0052] like Figure 6 As shown, in a preferred embodiment of the present invention, the vibration mechanism 6 includes a No. 3 motor 61, a connecting rod 62, a vibration sleeve 63, a connecting frame 64, a spring 65, and a guide sleeve 66.

[0053] The sampling cylinder 5 is vertically provided with a mechanism cavity 8 and a sampling cavity 9. A No. 3 motor 61 is fixedly connected in the mechanism cavity 8. The output shaft of the No. 3 motor 61 is fixedly connected to a connecting rod 62. The upper end of the connecting frame 64 is inserted into the connecting rod 62. The lower part of the spring 65 is connected to the guide sleeve 66. The upper part of the spring 65 is rotatably connected to the rotating seat in the connecting rod 62. The connecting frame 64 is fixedly connected to a vibration sleeve 63. The vibration sleeve 63 is vertically slidably connected to the sampling cylinder 5.

[0054] The connecting frame 64 is fixedly connected to a guide sleeve 66, the upper part of which is provided with multiple meshing teeth, and the upper part of the guide sleeve 66 meshes with the lower part of the connecting rod 62.

[0055] In this embodiment, the No. 3 motor 61 is started, and the No. 3 motor 61 drives the connecting rod 62 to rotate. The lower part of the connecting rod 62 pushes the upper part of the guide sleeve 66. At this time, the guide sleeve 66 drives the connecting frame 64 to move down, and the spring 65 is stretched elastically. Under the elastic force of the spring 65 and the continuous thrust of the connecting rod 62, the connecting frame 64 drives the vibrating sleeve 63 to reciprocate vertically.

[0056] When motor 61 rotates at a fixed speed, the vibrating sleeve 63 can maintain reciprocating vibration through the elastic force of spring 65 and the push of connecting rod 62. Changing the speed of motor 61 will adjust the vibration frequency and impact force of vibrating sleeve 63.

[0057] like Figure 5 As shown, in a preferred embodiment of the present invention, the separating component 7 includes a ring 71, a separating cutter 72, an electromagnet 73, and a magnetic ring 74;

[0058] The sampling cylinder 5 is provided with a vertical groove 13 along its inner sidewall. Multiple rings 71 are provided in the sampling cylinder 5, and the protruding part on the sidewall of each ring 71 is slidably connected in the groove 13. A magnetic ring 74 is provided near the bottom of the groove 13 and is embedded in the inner wall of the sampling cylinder 5.

[0059] Multiple dividing rods 72 are rotatably connected to the inner side of the ring 71. The dividing rods 72 are fitted into the inner wall of the ring 71. A plastic film is connected between the dividing rods 72 and the inner cavity of the ring 71. Magnetic blocks are provided on the side walls of the dividing rods 72. Multiple electromagnets 73 are provided in the side walls of the ring 71. Each dividing rod 72 is located on one side of an electromagnet 73. All electromagnets 73 are electrically connected to the control system.

[0060] In this embodiment, initially, all the rings 71 are attracted and fixed to the magnetic ring 74 by electromagnets 73. When the sampling cylinder 5 stops pressing down, the control system controls the electromagnet 73 of the uppermost ring 71 to change its magnetic pole, releasing it from the magnetic ring 74.

[0061] Specifically, when the sampling cylinder 5 is pressed down to the soil sample, at this time, the two magnetic poles of all the electromagnets 73 on the ring sleeve 71 are respectively adsorbed with the magnetic ring 74 and the magnetic block on one side of the separation cutter 72, so that the ring sleeve 71 is stably fixed at the bottom of the sliding groove 13. When the sampling cylinder 5 is paused to press down to the soil sample, at this time, the regulation system controls the magnetic poles of all the electromagnets 73 on the uppermost ring sleeve 71 to change direction. At this time, the uppermost ring sleeve 71 is released from the adsorption and fixation with the magnetic ring 74, and all the electromagnets 73 on the uppermost ring sleeve 71 push the separation cutter 72 on one side thereof outward. Under the pushing force of the electromagnets 73, one end of all the separation cutters 72 moves close to the connecting rod 62, and the separation cutters 72 separate the soil sample. At this time, all the separation cutters 72 drive the plastic film connected thereto to unfold, so as to separate the soil sample on the upper side of the plastic film.

[0062] In this embodiment, the soil sample entering the sampling cavity 9 is separated by the respective separation assemblies 7, so as to avoid the collected soil sample from being pressed down and deposited, and at the same time, avoid the water in the soil sample from accumulating downward. In addition, the separation of the soil sample by the plastic film connected with the separation cutters 72 can reduce the vibration of the vibration mechanism 6 on the collected soil sample, so as to avoid the soil sample from being loosened by external force.

[0063] As a preferred embodiment of the present application, the regulation system comprises a data processor and a PLC controller. The data processor can record the pressure value of the pressure sensor and the humidity value of the humidity sensor in the detection assembly 2, and compare the pressure value of the pressure sensor and the humidity value of the humidity sensor with the preset pressure threshold value and humidity threshold value in the data processor respectively, and form judgment information.

[0064] The PLC controller can control the pushing mechanism 4 and the vibration mechanism 6 according to the judgment information of the data processor. All the electromagnets 73 are electrically connected with the PLC controller.

[0065] In this embodiment, when the pressure value in the pressure sensor in the detection assembly 2 exceeds the preset pressure threshold value in the data processor, at this time, it indicates that the adhesion of the soil sample in the detection assembly 2 is low. Therefore, the PLC controller controls the pushing mechanism 4 to increase the pressing speed, and the PLC controller controls the vibration mechanism 6 to reduce the vibration frequency, so as to avoid the soil sample from being loosened by external force during the sampling process.

[0066] When the humidity value of the humidity sensor in the detection assembly 2 exceeds the maximum humidity threshold value preset in the data processor, it indicates that the moisture content of the soil sample in the detection assembly 2 is too high, the adhesion of the soil sample is low, and the soil sample is easy to loosen. Therefore, the PLC controller controls the pushing mechanism 4 to reduce the pressing speed, so as to avoid that the pushing mechanism 4 presses too fast to make the soil sample compact and discharge water. Meanwhile, the PLC controller controls the vibration mechanism 6 to reduce the vibration frequency, so as to avoid that the soil sample is loosened by external force during the sampling process.

[0067] When the humidity value of the humidity sensor in the detection assembly 2 is lower than the minimum humidity threshold value preset in the data processor, it indicates that the moisture content of the soil sample is low. At this time, the PLC controller controls the pushing mechanism 4 to increase the pressing speed, and the PLC controller controls the vibration mechanism 6 to reduce the vibration frequency, so as to improve the sampling efficiency and avoid that the soil sample is loosened by external force during the sampling process.

[0068] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A groundwater sampling device, comprising a support frame (1), characterized in that, The support frame (1) is threaded with positioning rods (11) at both ends. A detection component (2) is provided on the lower side of the support frame (1). A drive component (3) is connected between the detection component (2) and the support frame (1). The drive component (3) can drive the detection component (2) to move vertically. The detection component (2) can be inserted into the soil and measure the water content of the soil sample in the detection component (2) and the lateral pressure of the soil sample on the detection component (2). The detection component (2) is provided with a sampling tube (5), which has multiple air outlets (12) arranged vertically. A thrust mechanism (4) is provided between the sampling tube (5) and the support frame (1). The thrust mechanism (4) can push the sampling tube (5) to move vertically. A vibration mechanism (6) is provided at the bottom of the sampling tube (5). The vibration mechanism (6) can vibrate and propel into the soil. The sampling tube (5) is vertically provided with multiple dividing components (7), which can vertically divide the soil sample entering the sampling tube (5); The control system can control the propulsion speed of the thrust mechanism (4) and the vibration frequency of the vibration mechanism (6) through the measurement results of the detection component (2). The control system can control the sampling tube (5) to sample the soil sample by the layered pressing method. The separating component (7) includes a ring sleeve (71), a separating cutter (72), an electromagnet (73), and a magnetic ring (74); the sampling cylinder (5) is provided with a vertical groove (13) along its inner sidewall, and multiple ring sleeves (71) are vertically slidably connected in the groove (13), and a magnetic ring (74) is fixedly provided near the bottom of the groove (13). Multiple dividing rods (72) are rotatably connected to the inner side of the ring (71). The dividing rods (72) are fitted into the inner wall of the ring (71). A plastic film is connected between the dividing rods (72) and the inner cavity of the ring (71). A magnetic block is provided on the side wall of the dividing rods (72). Multiple electromagnets (73) are provided in the side wall of the ring (71). Each dividing rod (72) is located on one side of an electromagnet (73).

2. The groundwater monitoring sampling device according to claim 1, characterized in that, The detection component (2) includes a detection cylinder (21) and a limiting block (22). The detection cylinder (21) is fixedly connected to a guide rod (10). The guide rod (10) is vertically slidably connected to the support frame (1). Multiple rows of limiting blocks (22) are evenly distributed on the inner wall of the detection cylinder (21). All limiting blocks (22) are slidably connected to the inner wall of the detection cylinder (21). An elastic push spring is provided between the limiting block (22) and the inner wall of the detection cylinder (21). A pressure sensor is provided between the limiting block (22) and the elastic push spring. A humidity sensor is provided on the surface of the limiting block (22).

3. The groundwater monitoring sampling device according to claim 1, characterized in that, The drive assembly (3) includes a first motor (31), a first gear sleeve (32), a first threaded rod (33), and a first drive wheel (34). The support frame (1) is fixedly connected to a No. 1 motor (31), the output shaft of the No. 1 motor (31) is fixedly connected to a No. 1 drive wheel (34), the upper part of the support frame (1) is rotatably connected to a No. 1 gear sleeve (32), the No. 1 gear sleeve (32) meshes with the No. 1 drive wheel (34), the No. 1 gear sleeve (32) is threadedly connected to a No. 1 threaded rod (33), and the No. 1 threaded rod (33) is fixedly connected to the detection component (2).

4. The groundwater monitoring sampling device according to claim 1, characterized in that, The thrust mechanism (4) includes a second motor (41), a second gear sleeve (42), a second threaded rod (43), a second drive wheel (44), and a limiting sleeve (45). The second motor (41) is fixedly connected to the support frame (1). The output shaft of the second motor (41) is fixedly connected to the second drive wheel (44). The upper end face of the support frame (1) is rotatably connected to the second gear sleeve (42). The second gear sleeve (42) meshes with the second drive wheel (44). The lower end face of the support frame (1) is fixedly connected to the limit sleeve (45). The limit sleeve (45) is vertically slidably connected to the second threaded rod (43). The second threaded rod (43) is threadedly connected to the second gear sleeve (42). The sampling cylinder (5) is fixedly connected to the lower end of the second threaded rod (43).

5. The groundwater monitoring sampling device according to claim 1, characterized in that, The vibration mechanism (6) includes a No. 3 motor (61), a connecting rod (62), a vibration sleeve (63), a connecting frame (64), a spring (65), and a guide sleeve (66). The sampling cylinder (5) is provided with a mechanism cavity (8) and a sampling cavity (9) in the vertical direction. A No. 3 motor (61) is fixedly connected in the mechanism cavity (8). The output shaft of the No. 3 motor (61) is fixedly connected to a connecting rod (62). The upper end of the connecting frame (64) is inserted into the connecting rod (62). The lower part of the spring (65) is connected to the guide sleeve (66). The upper part of the spring (65) is rotatably connected to the rotating seat in the connecting rod (62). The connecting frame (64) is fixedly connected to a vibration sleeve (63). The vibration sleeve (63) is vertically slidably connected to the sampling cylinder (5). The connecting frame (64) is fixedly connected to a guide sleeve (66), and the upper part of the guide sleeve (66) is provided with multiple meshing teeth, and the upper part of the guide sleeve (66) meshes with the lower part of the connecting rod (62).

6. The groundwater monitoring sampling device according to claim 1, characterized in that, The control system includes a data processor and a PLC controller. The data processor can record the pressure value of the pressure sensor and the humidity value of the humidity sensor in the detection component (2). The data processor compares the pressure value of the pressure sensor and the humidity value of the humidity sensor with the preset pressure threshold and humidity threshold in the data processor, respectively, and forms judgment information. The PLC controller can control the thrust mechanism (4) and the vibration mechanism (6) based on the judgment information of the data processor.

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