Underground water monitoring device for environmental engineering

Abstract

According to the underground water monitoring device for environmental engineering applied to the field of water quality monitoring, an inner column, a rotating motor, a connecting rod, a small speed reducer, a rotating rod and other parts in a sampling inner barrel are used in cooperation, and automatic rotation and cleaning of the sampling barrel are achieved. Meanwhile, due to the design of components such as a partition plate, a circular plate and a transfer pipe, the sampling cavities are distributed more reasonably, the balance weight can be uniform, the inclination of the sampling device is avoided, and in addition, due to the combination of a silica gel strip and a cleaning frame and the inflation and deflation of a deformation bag, the cleaning assembly is tighter and more effective when being attached to the outer wall of the sampling barrel for cleaning. Meanwhile, a small air pump is used for sucking the deformation bag, impurities and foreign matters on the scraping surface of the silica gel strip are cleaned, the cleaning effect is further improved, residual cleaned impurities are prevented from falling into a liquid inlet hole above due to the design of a sealing plate, and the sampling purity is guaranteed.

Description

Technical Field

[0001] The present invention relates to a groundwater monitoring device, in particular to a groundwater monitoring device for environmental engineering applied to the field of water quality monitoring. Background Art

[0002] In environmental engineering, groundwater quality monitoring is an important project, which is of great significance in ensuring drinking water safety, preventing and controlling pollution, ecological protection and biodiversity, and sustainable water resource management. Currently, groundwater quality monitoring usually uses sampling equipment for sampling and monitoring.

[0003] The specification of Chinese invention patent CN117405459B discloses a device and method for layered water sampling in a groundwater monitoring well, which enables the sampling mechanism to gradually perform automatic layered sampling on each layer of water samples and cache them separately, improving the monitoring effect of water samples in the groundwater monitoring well and facilitating comprehensive monitoring of groundwater.

[0004] In addition, the specification of Chinese invention patent CN118348070B discloses a groundwater quality monitoring device based on layered monitoring, which can sample groundwater in layers, saving time and effort. A stabilizing mechanism is arranged under the monitoring device to prevent the monitoring device from tipping over during sinking.

[0005] During the sampling process of existing layered sampling equipment, a filter screen structure is used to prevent foreign objects from entering the sample water body. However, in actual operation, items such as sediment and algae need to be detected in water quality monitoring. Therefore, interception will reduce the detection accuracy and precision of the sample water body. In addition, as the sampling mechanism sinks in the water body, residues of the upper water body will adhere to the surface of the sampling mechanism. When reaching a new sampling point, if no targeted cleaning operation is carried out, the sample substances between the upper and lower water bodies will be mixed, affecting the detection results. Moreover, during layered sampling, there is a sequence, resulting in an inclined state of the sampling device during the sinking process, affecting the consistency of the sampling liquid level during sampling. Summary of the Invention

[0006] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is how to balance the uniform weight during layered sampling of the sampling device and avoid the entry of other foreign objects during sampling to ensure the monitoring accuracy.

[0007] To solve the above problems, the present invention provides a groundwater monitoring device for environmental engineering, including a sampling cylinder and a monitoring instrument. The bottom of the sampling cylinder is threadedly connected with a sealing bottom plate. The top of the sealing bottom plate is fixedly installed with a sampling inner cylinder. An inner column is installed inside the sampling inner cylinder. A rotating motor is inlaid at a position near the top of the inner column. The output end of the rotating motor is connected with a connecting rod. The tail end of the connecting rod is connected with a small reducer. The output end of the small reducer is connected with a rotating rod. The top of the rotating rod is detachably connected with a feeding rope. Symmetrically arranged cleaning components are inserted on the surface of the rotating rod. An upper plug plate is fixedly sleeved on the surface of the connecting rod;

[0008] A plurality of partition plates are fixedly installed on the surface of the inner column. The number of partition plates is an even number. And two adjacent partition plates and the inner wall of the sampling inner cylinder form a sampling cavity. A circular plate is sleeved on the surface of the inner column. And the circular plate divides each sampling cavity into two identical parts. A transfer pipe is installed inside each sampling cavity. And one end of the transfer pipe extends to the lower part of the circular plate in another sampling cavity. The connection line of the sampling cavities where the two ends of the transfer pipe are located passes through the center of the inner column.

[0009] In the above-mentioned groundwater monitoring device for environmental engineering, the design of components such as partition plates, circular plates, and transfer pipes makes the distribution of the sampling cavities more reasonable, can achieve uniform counterweight, and avoid the inclination of the sampling device. In addition, the cooperation of the cleaning components and the liquid inlet holes can ensure the comprehensiveness and accuracy of the sample monitoring results.

[0010] As a further improvement of the present application, the connection position between the circular plate and the partition plate is at the midpoint position of the partition plate in the vertical direction. The transfer pipe penetrates through the inner column and the connection position between the transfer pipe and the inner column is below the rotating motor.

[0011] As a further improvement of the present application, a lower plug plate protruding from the inside of the sampling inner cylinder is rotatably installed at a position near the top of the inner wall of the sampling inner cylinder. And symmetrically arranged fitting blocks are installed on the protruding surface of the lower plug plate. A circular notch is provided on the top wall of the sampling cylinder. The inner wall of the circular notch is provided with a fitting groove matching with the fitting block. And the height value of the fitting groove is less than the thickness value of the circular notch. The diameter of the circular notch is the same as that of the upper plug plate.

[0012] As a further improvement of the present application, the connecting rod and the lower plug plate are rotatably and sealingly connected. Liquid inlet holes penetrating through are provided inside both the upper plug plate and the lower plug plate. After the rotating motor drives the upper plug plate to rotate so as to be staggered with the liquid inlet hole on the surface of the lower plug plate, the rotating motor continues to rotate until the liquid inlet holes on the surfaces of the upper plug plate and the lower plug plate coincide.

[0013] As a further improvement of the present application, a sealing plate is installed on the inner wall of the liquid inlet hole in the upper plug plate through a shaft rod. A gear part is installed on the surface of the shaft rod. A strip-shaped groove is provided inside the upper plug plate. An electromagnetic block is installed on the inner wall of the strip-shaped groove. A magnetic moving rack is slidably connected inside the strip-shaped groove. And the magnetic moving rack is meshed with the gear part.

[0014] As a further improvement of the present application, a toothed ring is installed on the outer wall of the sampling inner cylinder, a driving motor is installed on the inner wall of the sampling cylinder, the output end of the driving motor is connected with a gear meshing with the toothed ring, a small air pump with the same weight as the driving motor is installed inside the sampling cylinder, and the connection line between the small air pump and the driving motor passes through the center of the inner column.

[0015] As a further improvement of the present application, an ultrasonic vibrator is installed on the surface of each adapter pipe, a liquid level sensor is installed inside the space below the circular plate in each sampling cavity, and each liquid level sensor is signal-connected to the ultrasonic vibrator.

[0016] As another improvement of the present application, the cleaning assembly includes a cleaning frame. A silica gel strip protruding from the top inside the cleaning frame is connected to the inner wall of the cleaning frame. A deformation bag is installed in the cavity formed by the silica gel strip and the inner wall of the cleaning frame, and the deformation bag is made of polyvinylidene chloride film. A restraint block is fixedly connected to the end of the deformation bag facing away from the inner wall of the cleaning frame, and the cross-sectional length of the restraint block.

[0017] As a supplement to another improvement of the present application, the output end of the small air pump is connected with a branch hose, and the tail end of the branch hose is hermetically connected through each deformation bag. The silica gel strip is in close contact with the surfaces of the sampling cylinder, the sealing bottom plate and the upper plug plate when the deformation bag is in the inflated state, and there is a gap between the silica gel strip and the surfaces of the sampling cylinder, the sealing bottom plate and the upper plug plate when the deformation bag is in the deflated state and the silica gel strip still protrudes from the top of the cleaning frame.

[0018] In summary, the combined use of components such as the inner column, rotating motor, connecting rod, small reducer, rotating rod, etc. inside the sampling inner cylinder realizes the automatic rotation and cleaning of the sampling cylinder. At the same time, the design of components such as the partition plate, circular plate, and adapter pipe makes the distribution of the sampling cavities more reasonable, enables uniform weight distribution, and avoids the inclination of the sampling device. In addition, the combination of the silica gel strip and the cleaning frame, as well as the inflation and deflation of the deformation bag, makes the cleaning assembly more compact and effective when cleaning in contact with the outer wall of the sampling cylinder. At the same time, the small air pump is used to perform a suction operation on the deformation bag to clean the impurities and foreign matters on the scraping surface of the silica gel strip, further improving the cleaning effect. The design of the sealing plate also prevents the residual impurities from cleaning from falling into the upper liquid inlet hole, ensuring the purity of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0020] Figure 2 It is a structural diagram of the inside of the sampling cylinder of the first embodiment of the present application;

[0021] Figure 3Internal view of the sampling inner cylinder of the first embodiment of the present application;

[0022] Figure 4 Installation diagram of the upper plug plate, lower plug plate and rotating motor of the first embodiment of the present application;

[0023] Figure 5 Installation diagram of the connecting rod, small reducer and rotating rod of the first embodiment of the present application;

[0024] Figure 6 Schematic installation diagram of the partition plate, circular plate and transfer pipe of the first embodiment of the present application;

[0025] Figure 7 Planar schematic diagram of the partition plate, circular plate and transfer pipe of the first embodiment of the present application (only one transfer pipe is drawn for easy viewing);

[0026] Figure 8 Process diagram of the counterweight of the transfer pipe of the first embodiment of the present application;

[0027] Figure 9 Composition schematic diagram of the cleaning component of the second embodiment of the present application;

[0028] Figure 10 Cross-sectional view of the cleaning component of the second embodiment of the present application;

[0029] Figure 11 State diagram of the deflated deformation bag inside the cleaning component of the second embodiment of the present application;

[0030] Figure 12 Schematic diagram of the cleaning state of the silica gel strip of the second embodiment of the present application;

[0031] Figure 13 Installation diagram of the sealing plate, magnetic moving rack and electromagnetic block of the first embodiment of the present application;

[0032] Figure 14 Working state diagram of the sealing plate, magnetic moving rack and electromagnetic block of the first embodiment of the present application.

[0033] Explanation of the reference numerals in the figure:

[0034] 1. Sampling cylinder; 2. Feeding rope; 3. Small air pump; 4. Cleaning component; 5. Sealing bottom plate; 6. Sampling inner cylinder; 7. Lower plug plate; 8. Upper plug plate; 81. Sealing plate; 82. Magnetic moving rack; 83. Electromagnetic block; 9. Connecting rod; 91. Rotating rod; 92. Small reducer; 10. Driving motor; 11. Ring gear; 12. Inner column; 13. Partition plate; 131. Circular plate; 132. Transfer pipe; 41. Cleaning frame; 42. Silica gel strip; 43. Deformation bag; 44. Constraint block; 14. Rotating motor. Detailed implementation manners

[0035] The following will describe in detail two implementation manners of the present application with reference to the accompanying drawings.

[0036] The first implementation manner:

[0037] Figures 1 - 5 There is shown a groundwater monitoring device for environmental engineering, including a sampling cylinder 1 and a monitoring instrument. A sealing bottom plate 5 is threadedly connected to the bottom of the sampling cylinder 1. A sampling inner cylinder 6 is fixedly installed on the top of the sealing bottom plate 5. An inner column 12 is installed inside the sampling inner cylinder 6. A rotating motor 14 is inlaid at a position near the top of the inner column 12. The output end of the rotating motor 14 is connected to a connecting rod 9. The tail end of the connecting rod 9 is connected to a small reducer 92. The output end of the small reducer 92 is connected to a rotating rod 91. A discharging rope 2 is detachably connected to the top of the rotating rod 91. Cleaning assemblies 4 are symmetrically inserted on the surface of the rotating rod 91. An upper plug plate 8 is fixedly sleeved on the surface of the connecting rod 9;

[0038] Figures 6 - 7 There is shown that a plurality of partition plates 13 are fixedly installed on the surface of the inner column 12. The number of the partition plates 13 is an even number. A sampling cavity is formed between two adjacent partition plates 13 and the inner wall of the sampling inner cylinder 6. A circular plate 131 is sleeved on the surface of the inner column 12. The circular plate 131 divides each sampling cavity into two identical parts. A transfer pipe 132 is installed inside each sampling cavity. One end of the transfer pipe 132 extends to the lower part of the circular plate 131 in another sampling cavity. The connecting line of the sampling cavities where the two ends of the transfer pipe 132 are located passes through the center of the inner column 12.

[0039] The connection position between the circular plate 131 and the partition plate 13 is located at the midpoint position of the partition plate 13 in the vertical direction. The transfer pipe 132 penetrates through the inner column 12, and the connection position between the transfer pipe 132 and the inner column 12 is located below the rotating motor 14. A small air pump 3 with the same weight as the driving motor 10 is installed inside the sampling cylinder 1. The connecting line of the small air pump 3 and the driving motor 10 passes through the center of the inner column 12.

[0040] Specifically, the cleaning assembly 4 is connected to the rotating rod 91 by bolts and is a detachable connection. Therefore, when it is necessary to take out the sampling inner cylinder 6 subsequently, the cleaning assembly 4 can be first detached from the surface of the rotating rod 91. Then, the detachable discharging rope 2 (which can be connected by a buckle or bundled, and is selected according to the actual situation without fixed limitation) is detached from the rotating rod 91. Then, the sealing bottom plate 5 can be removed. As the sealing bottom plate 5 is removed, the sampling inner cylinder 6, the upper plug plate 8 and the lower plug plate 7 are all detached from the inside of the sampling cylinder 1.

[0041] During sampling, after the sampling cylinder 1 is lowered to a set depth in the water body by using the discharging rope 2, the rotation motor 14 is started to drive the connecting rod 9 to rotate. Under the action of the small reducer 92, the upper plug plate 8 and the cleaning component 4 can be made to rotate at different speeds, so that the upper plug plate 8 can receive the cleaning effect of the cleaning component 4 synchronously during rotation. There are two sets of cleaning components 4. Therefore, when the upper plug plate 8 does not rotate one full circle, the cooperation of the two cleaning components 4 can comprehensively scrape and clean the outer wall of the sampling cylinder 1, and the time point when the two cleaning components 4 clean the outer wall of the sampling cylinder 1 for one week is earlier than the time point when the liquid inlet hole in the upper plug plate 8 coincides with the liquid inlet hole in the lower plug plate 7. Therefore, during sampling, it is possible to avoid algae or other foreign impurities adhered to the outer wall surface of the sampling cylinder 1 during the sinking process from entering the sampling cavity along with the water.

[0042] Figure 8 As shown, when the two liquid inlet holes coincide, the water in the sampled water body (even if the sample water body contains foreign substances such as algae and sediment, it can enter smoothly without being intercepted, which can ensure the integrity of the detection result to the greatest extent) can smoothly enter the corresponding sampling cavity (due to the limited space of the sampling cavity during the sampling process, the time for the water body to rush in and fill it is not long, and each sampling cavity in this application is composed of upper and lower sub-sampling cavities arranged in a staggered manner, resulting in the water body first entering the lower sub-sampling cavity after rushing in, but it will soon be filled, and then the upper sub-sampling cavity will be filled with the sample water body. The uneven weight caused by this short time difference is ignored). At this time, due to the existence of the transfer pipe 132, there can be sampled water bodies in both the upper and lower sub-sampling cavities arranged in a staggered manner, and the spaces of the upper and lower sub-sampling cavities arranged in a staggered manner are the same, and the two sub-sampling cavities (the overall number of sampling cavities is an even number. For example, if there are 6 sampling cavities, after being marked counterclockwise, the 1st sampling cavity is actually the upper part of the 1st sampling cavity on the circular plate 131 and the 4th sampling cavity on the lower part of the circular plate 131, and the two separated parts are axisymmetric), so it can play a role in weight balance.

[0043] Compared with the inclination of the sampling device caused by sampling in each sampling cavity in the prior art (for example, in 6 sampling cavities, after being marked counterclockwise, after the 1st cavity is sampled, there is no sample arrangement in the 4th cavity which is axisymmetric to it, so the 6 sampling cavities are in a state of uneven weight distribution), which further leads to a difference in the depth of the sample water layer during sampling and expands the detection error. This application can, through the cooperation of the transfer pipe 132 and the circular plate 131, adjust the distribution state of the sampling cavities to achieve uniform weight balance.

[0044] A lower plug plate 7 protruding from the inside of the sampling inner cylinder 6 is rotatably installed at a position near the top end of the inner wall of the sampling inner cylinder 6, and symmetrically arranged fitting blocks are installed on the protruding surface of the lower plug plate 7. A circular notch is provided on the top wall of the sampling cylinder 1, and a fitting groove matching the fitting blocks is provided on the inner wall of the circular notch, and the height value of the fitting groove is less than the thickness value of the circular notch. The diameter of the circular notch is the same as that of the upper plug plate 8.

[0045] The connecting rod 9 is rotatably and hermetically connected to the lower plug plate 7. Through holes for liquid inlet are provided inside both the upper plug plate 8 and the lower plug plate 7. After the rotating motor 14 drives the upper plug plate 8 to rotate so that the liquid inlet holes on the surface of the upper plug plate 8 are staggered from those on the surface of the lower plug plate 7, the rotating motor 14 continues to rotate until the liquid inlet holes on the surfaces of the upper plug plate 8 and the lower plug plate 7 coincide.

[0046] A toothed ring 11 is installed on the outer wall of the sampling inner cylinder 6, and a driving motor 10 is installed on the inner wall of the sampling cylinder 1. The output end of the driving motor 10 is connected with a gear meshing with the toothed ring 11.

[0047] Specifically, when the driving motor 10 is started, the sampling inner cylinder 6 can be driven to rotate a certain angle by means of the meshing of the gear and the toothed ring 11 to realize the sequential adjustment of the sampling chambers. And because of the matching of the fitting blocks and the fitting grooves, the fitting constraint between the lower plug plate 7 and the sampling cylinder 1 can be achieved. Therefore, the liquid inlet holes on the surface of the lower plug plate 7 remain stationary when the sampling inner cylinder 6 rotates, and further, the position of the liquid inlet holes remains stationary when the sampling chambers change.

[0048] An ultrasonic vibrator is installed on the surface of each transfer pipe 132, and a liquid level sensor is installed inside the space below the circular plate 131 in each sampling chamber, and each liquid level sensor is signal-connected to the ultrasonic vibrator.

[0049] Specifically, since the sampled water body will inevitably be mixed with foreign matters such as sediment, if the transfer pipe 132 is blocked, the weights of the sampled water bodies at both ends of the transfer pipe 132 will be inconsistent (the amount of water below is less than that above). At this time, the liquid level sensor can detect that the lower sampling chamber is not full, and it can be inferred that the transfer pipe 132 is blocked. At this time, the ultrasonic vibrator is started to vibrate and clean the transfer pipe 132, so as to play a role in dredging the pipeline.

[0050] Figure 13 As shown, a sealing plate 81 is installed on the inner wall of the liquid inlet hole in the upper plug plate 8 through a shaft rod. A gear member is installed on the surface of the shaft rod. A strip-shaped groove is provided inside the upper plug plate 8. An electromagnetic block 83 is installed on the inner wall of the strip-shaped groove. A magnetically driven rack 82 is slidably connected inside the strip-shaped groove, and the magnetically driven rack 82 is meshed with the gear member.

[0051] Specifically, when the cleaning component 4 is working, impurities on the surface of the upper plug plate 8 being cleaned enter through the liquid inlet holes in the upper plug plate 8, resulting in residues. When the liquid inlet holes in the upper plug plate 8 coincide with those in the lower plug plate 7 subsequently, they will fall back into the new sampling cavity. To avoid the above phenomenon, a movable sealing plate 81 is used to make up for it.

[0052] When the two liquid inlet holes coincide, the electromagnet block 82 and the magnetic moving rack 83 cooperate to drive the gear component to rotate, thereby driving the sealing plate 81 to rotate to a vertical state (as Figure 14 shown), facilitating the sampling water body to enter the sampling cavity. After the sampling is completed, the electromagnet block 82 and the magnetic moving rack 83 cooperate to drive the gear component to rotate in the reverse direction, so that the sealing plate 81 returns to the horizontal state, and the top of the sealing plate 81 is flush with the top of the upper plug plate 8 (and it can also prevent foreign objects from entering during this period). Furthermore, when the cleaning component 4 is working, it can prevent the residual impurities being cleaned from falling into the upper liquid inlet hole.

[0053] The second implementation method:

[0054] Figures 9 - 10 It is shown that the cleaning component 4 includes a cleaning frame 41. A silica gel strip 42 protruding from the top inside the cleaning frame 41 is connected to the inner wall of the cleaning frame 41. A deformation bag 43 is installed in the cavity formed by the silica gel strip 42 and the inner wall of the cleaning frame 41, and the deformation bag 43 is made of polyvinylidene chloride film. The end of the deformation bag 43 facing away from the inner wall of the cleaning frame 41 is fixedly connected with a restraint block 44, and the cross-sectional length of the restraint block 44.

[0055] The output end of the small air pump 3 is connected with a branch hose, and the tail end of the branch hose is hermetically connected through each deformation bag 43. The silica gel strip 42 is in contact with the surfaces of the sampling cylinder 1, the sealing bottom plate 5, and the upper plug plate 8 when the deformation bag 43 is in an inflated state. There is a gap between the silica gel strip 42 and the surfaces of the sampling cylinder 1, the sealing bottom plate 5, and the upper plug plate 8 when the deformation bag 43 is in a deflated state, and the silica gel strip 42 still protrudes from the top of the cleaning frame 41.

[0056] Different from the first implementation method, this implementation method improves the cleaning component 4 in the first implementation method. When the cleaning component 4 rotates to scrape off impurities and foreign objects on the surfaces of the sampling cylinder 1, the sealing bottom plate 5, and the upper plug plate 8, when the flow rate of the sampling water body is relatively low (close to zero), impurities and foreign objects will accumulate on the scraping surface of the cleaning component 4. During sampling, some impurities and foreign objects on the scraping surface of the cleaning component 4 will inevitably spread into the liquid inlet, causing sample contamination. In this implementation method, the parts where the silica gel strip 42 contacts the cleaning frame 41 are all fixedly connected.

[0057] Specifically, in the initial state, a small air pump 3 (an air pump capable of suction operation) is used to inflate the deformation bag 43. Since the deformation bag 43 is made of polyvinylidene chloride film (other materials can be selected as long as their properties are similar to those of polyvinylidene chloride film), its tensile property is poor. Therefore, after inflation, the restraint block 44 can restrain the silica gel strip 42 into a state with a rectangular end, which is convenient for fitting on the outer wall of the sampling cylinder 1, so that the silica gel strip 42 can be cleaned in a state protruding from the cleaning frame 41.

[0058] Mark the time point when the liquid inlet hole in the upper plug plate 8 coincides with the liquid inlet hole in the lower plug plate 7 as T, and mark the time point when the cleaning component 4 has cleaned the inner wall of the sampling cylinder 1 for one week as N (N is before T, and the specific reason has been explained in the first embodiment). Select a time point M within the value range (N, T). At this time, use the small air pump 3 to suck out the gas in the deformation bag 43, making the deformation bag 43 collapse and soften (as Figure 11 shown). At this time, the end of the silica gel strip 42 loses the restraint of the restraint block 44 and becomes an arched state. There is a gap between the arched part and the outer wall of the sampling cylinder 1. At this time, the rotation motor 14 rotates quickly forward and backward (for a short duration, and the weight of the cleaning component 4 is less than that of the sampling cylinder 1, so the quick forward and reverse rotation has little impact on the sampling cylinder 1), driving the cleaning component 4 to swing (as Figure 12 shown), so as to clean the impurities and foreign matters on the scraping surface of the silica gel strip 42. After that, use the feeding rope 2 to drive the sampling cylinder 1 to tilt and shake to transfer the impurities and foreign matters cleaned by the silica gel strip 42 at the top of the sampling cylinder 1. Then, the feeding rope 2 drives the sampling cylinder 1 to translate a small distance (still in the sampling water body at the same depth. The purpose of translation is mainly to avoid the impurities and foreign matters cleaned by shaking from being sampled. The translation distance is greater than the diameter of the sampling cylinder 1). After that, the rotation motor 14 continues to rotate, driving the two liquid inlet holes to coincide.

[0059] In summary, the combined use of components such as the inner column 12, rotation motor 14, connecting rod 9, small reducer 92, and rotating rod 91 inside the sampling inner cylinder 6 realizes the automatic rotation and cleaning of the sampling cylinder 1. At the same time, the design of components such as the partition plate 13, round plate 131, and transfer pipe 132 makes the distribution of the sampling cavity more reasonable, can achieve uniform weight, and avoid the inclination of the sampling device. In addition, the combination of the silica gel strip 42 and the cleaning frame 41, as well as the inflation and deflation of the deformation bag 43, make the cleaning component 4 more tightly and effectively clean when fitting on the outer wall of the sampling cylinder 1. At the same time, the use of the small air pump 3 to perform suction operation on the deformation bag 43 realizes the cleaning of the impurities and foreign matters on the scraping surface of the silica gel strip 42, further improving the cleaning effect. The design of the sealing plate 81 also avoids the residual impurities from falling into the upper liquid inlet hole, ensuring the purity of sampling.

[0060] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A groundwater monitoring device for environmental engineering, comprising a sampling cylinder (1) and monitoring instruments, characterized in that: The bottom of the sampling tube (1) is threadedly connected to a sealing bottom plate (5), the top of the sealing bottom plate (5) is fixedly installed with a sampling inner tube (6), the interior of the sampling inner tube (6) is installed with an inner column (12), a rotating motor (14) is embedded and installed near the top of the inner column (12), the output end of the rotating motor (14) is connected to a connecting rod (9), the tail end of the connecting rod (9) is connected to a small reducer (92), the output end of the small reducer (92) is connected to a rotating rod (91), the top of the rotating rod (91) is detachably connected with a discharge rope (2), the surface of the rotating rod (91) is plugged with symmetrically arranged cleaning components (4), and the surface of the connecting rod (9) is fixedly sleeved with an upper blocking plate (8); A plurality of partitions (13) are fixedly mounted on the surface of the inner column (12), the number of the partitions (13) is an even number, and two adjacent partitions (13) and the inner wall of the sampling inner cylinder (6) form a sampling cavity, a circular plate (131) is sleeved on the surface of the inner column (12), and the circular plate (131) divides each sampling cavity into two identical parts, a transfer tube (132) is mounted inside each sampling cavity, and one end of the transfer tube (132) extends to the bottom of the circular plate (131) in another sampling cavity, and a line connecting the sampling cavities where the two ends of the transfer tube (132) are located passes through the center of the inner column (12).

2. The groundwater monitoring device for environmental engineering according to claim 1, characterized in that: The connection position between the circular plate (131) and the partition (13) is located at the midpoint of the partition (13) in the vertical direction, the transfer tube (132) passes through the inner column (12), and the connection position between the transfer tube (132) and the inner column (12) is located below the rotary motor (14).

3. An underground water monitoring device for environmental engineering according to claim 1, characterized in that: A lower plugging plate (7) protruding from the interior of the sampling inner cylinder (6) is rotatably mounted on the inner wall of the sampling inner cylinder (6) near the top end, and symmetrically arranged engaging blocks are mounted on the protruding surface of the lower plugging plate (7). A circular notch is provided on the top wall of the sampling cylinder (1), and an engaging groove matching the engaging block is provided on the inner wall of the circular notch, and the height of the engaging groove is less than the thickness of the circular notch, and the diameter of the circular notch is the same as that of the upper plugging plate (8).

4. An underground water monitoring device for environmental engineering according to claim 3, characterized in that: The connecting rod (9) is connected to the lower plugging plate (7) in a rotating sealing manner. The upper plugging plate (8) and the lower plugging plate (7) are both provided with penetrating liquid inlet holes inside. After the rotating motor (14) drives the upper plugging plate (8) to rotate so as to be offset from the liquid inlet holes on the surface of the lower plugging plate (7), the rotating motor (14) continues to rotate until the liquid inlet holes on the surfaces of the upper plugging plate (8) and the lower plugging plate (7) overlap.

5. The groundwater monitoring device for environmental engineering according to claim 1, characterized in that: The outer wall of the sampling inner cylinder (6) is installed with a gear ring (11), the inner wall of the sampling cylinder (1) is installed with a driving motor (10), the output end of the driving motor (10) is connected with a gear meshing with the gear ring (11), and the interior of the sampling cylinder (1) is installed with a small air pump (3) having the same weight as the driving motor (10), and the connecting line between the small air pump (3) and the driving motor (10) passes through the center of the inner column (12).

6. The groundwater monitoring device for environmental engineering according to claim 1, characterized in that: An ultrasonic oscillator is surface-mounted on the surface of each of the adapter pipes (132), and a liquid level sensor is installed inside the space below the circular plate (131) for each of the sampling chambers, and each liquid level sensor is signal-connected to the ultrasonic oscillator.

7. An underground water monitoring device for environmental engineering according to claim 5, characterized in that: The cleaning assembly (4) includes a cleaning frame (41). A silica gel strip (42) protruding from the top inside the cleaning frame (41) is connected to the inner wall of the cleaning frame (41). A deformation bag (43) is installed in the cavity formed by the silica gel strip (42) and the inner wall of the cleaning frame (41), and the deformation bag (43) is made of polyvinylidene chloride film. A restraint block (44) is fixedly connected to the end of the deformation bag (43) facing away from the inner wall of the cleaning frame (41), and the cross-sectional length of the restraint block (44).

8. An underground water monitoring device for environmental engineering according to claim 7, characterized in that: The output end of the small air pump (3) is connected to a branch hose, and the tail end of the branch hose is hermetically connected through each deformation bag (43). The silica gel strip (42) is in surface contact with the surface of the sampling cylinder (1), the sealing bottom plate (5) and the upper plug plate (8) when the deformation bag (43) is in an inflated state. There is a gap between the silica gel strip (42) and the surface of the sampling cylinder (1), the sealing bottom plate (5) and the upper plug plate (8) when the deformation bag (43) is in a deflated state, and the silica gel strip (42) still protrudes from the top of the cleaning frame (41).

9. The groundwater monitoring device for environmental engineering according to claim 4, characterized in that: A sealing plate (81) is installed on the inner wall of the liquid inlet hole in the upper plug plate (8) through a shaft rod. A gear member is installed on the surface of the shaft rod. A strip-shaped groove is provided inside the upper plug plate (8). An electromagnet block (83) is installed on the inner wall of the strip-shaped groove. A magnetic moving rack (82) is slidably connected inside the strip-shaped groove, and the magnetic moving rack (82) is meshed with the gear member.

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