A groundwater monitoring device for environmental engineering

Abstract

The present application relates to a kind of environmental engineering groundwater monitoring devices applied to water quality monitoring field, the cooperation of the inside column, rotating motor, connecting rod, small reducer, rotating rod and other components in sampling inner cylinder inside, the automation rotation and cleaning of sampling cylinder are realized.Simultaneously, the design of baffle, round plate, adapter pipe and other components makes the distribution of sampling cavity more reasonable, can realize uniform counterweight, avoid the inclination of sampling device, in addition, the combination of silica gel strip and cleaning frame, and the inflation and deflation of deformation bag make the cleaning assembly more closely and effectively when cleaning the outer wall of sampling cylinder.Simultaneously, using small air pump to suck deformation bag, the impurities and foreign matters on the surface of silica gel strip are cleaned, further improve the cleaning effect, the design of sealing plate also avoids the residual impurities of cleaning falling into the liquid inlet above, guarantees the purity of sampling.

Description

TECHNICAL FIELD

[0001] The present application 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

[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 resources management. Currently, groundwater quality monitoring usually uses sampling equipment for sampling monitoring.

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

[0004] In addition, Chinese invention patent CN118348070B specification discloses a groundwater quality monitoring device based on layered monitoring, which can sample groundwater layer by layer, saving time and effort. The monitoring device is provided with a stabilizing mechanism to prevent the monitoring device from overturning during sinking.

[0005] The existing layered sampling equipment uses filter screen structure to prevent foreign matter from entering the sample water body during sampling. However, in actual operation, water quality monitoring contains items such as silt and algae that need to be detected, so interception will reduce the detection accuracy and precision of the sample water body. In addition, as the sampling mechanism sinks in the water body, the surface of the sampling mechanism will be accompanied by residues of the upper layer of water. If targeted cleaning operation is not performed when reaching the new sampling point, the sample will be mixed between the upper and lower layers of water, affecting the detection result. In addition, there is a sequence when layered sampling, which causes the sampling device to tilt during sinking, affecting the consistency of the sampling liquid surface. SUMMARY

[0006] To solve the above technical problems, the present application aims to balance the weight of the layered sampling device during sampling and avoid the entry of other foreign matter during sampling to ensure monitoring accuracy.

[0007] In order to solve the above problems, the present invention provides a groundwater monitoring device for environmental engineering, comprising a sampling tube and a monitoring instrument, wherein the bottom of the sampling tube is threadedly connected to a sealing bottom plate, a sampling inner tube is fixedly installed on the top of the sealing bottom plate, an inner column is installed inside the sampling inner tube, a rotating motor is embedded and installed near the top of the inner column, the output end of the rotating motor is connected to a connecting rod, the tail end of the connecting rod is connected to a small reducer, the output end of the small reducer is connected to a rotating rod, the top of the rotating rod is detachably connected to a discharge rope, the surface of the rotating rod is plugged with symmetrically arranged cleaning components, and the surface of the connecting rod is fixedly sleeved with an upper blocking plate;

[0008] A plurality of partitions are fixedly installed on the surface of the inner column, and the number of the partitions is an even number, and two adjacent partitions 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 tube is installed inside each sampling cavity, and one end of the transfer tube extends to the bottom of the circular plate in the other sampling cavity. The line connecting the sampling cavities where the two ends of the transfer tube 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 partitions, circular plates, and transfer tubes makes the distribution of the sampling chamber more reasonable, achieves uniform weight distribution, and avoids tilting of the sampling device. In addition, the coordination of the cleaning component and the liquid inlet hole 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 is located at the midpoint of the partition in the vertical direction, the adapter tube passes through the inner column, and the connection position between the adapter tube and the inner column is located below the rotating motor.

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

[0012] As a further improvement of the present application, the connecting rod and the lower baffle are connected in a rotating seal, and the upper and lower baffles are both provided with a penetrating liquid inlet hole. After the rotating motor drives the upper baffle to rotate so that it is offset from the liquid inlet hole on the surface of the lower baffle, the rotating motor continues to rotate until the liquid inlet holes on the surfaces of the upper and lower baffles 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 blocking plate through a shaft rod, a gear part is installed on the surface of the shaft rod, a strip groove is provided inside the upper blocking plate, an electromagnetic block is installed on the inner wall of the strip groove, a magnetic rack is slidably connected inside the strip groove, and the magnetic rack is meshed with the gear part.

[0014] As a further improvement of the present application, the outer wall of the sampling inner cylinder is provided with a gear ring, the inner wall of the sampling cylinder is provided with a driving motor, the output end of the driving motor is connected with a gear engaged with the gear ring, the inside of the sampling cylinder is provided with a small air pump with the same weight as the driving motor, and the connection line of 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, the surface of each adapter pipe is provided with an ultrasonic vibrator, each sampling cavity is provided with a liquid level sensor inside the space below the circular plate, and each liquid level sensor is signal connected with the ultrasonic vibrator.

[0016] As a further improvement of the present application, the cleaning assembly comprises a cleaning frame, the inner wall of the cleaning frame is connected with a silica gel strip protruding from the top 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, the deformation bag is made of polyvinylidene chloride film, and a restraint block is fixedly connected to the end of the deformation bag away from the inner wall of the cleaning frame.

[0017] As a further improvement of the present application, the output end of the small air pump is connected with a branch hose, the tail end of the branch hose is sealingly connected with each deformation bag, the silica gel strip is in contact with the surface of the sampling cylinder and the sealing bottom plate and the upper stop plate in the inflated state in the deformation bag, and there is a gap between the silica gel strip and the surface of the sampling cylinder and the sealing bottom plate and the upper stop plate in the deflated state in the deformation bag, and the silica gel strip still protrudes from the top of the cleaning frame.

[0018] In summary, the cooperation of the inner column, the rotating motor, the connecting rod, the small reducer and the rotating rod in the sampling inner cylinder realizes the automatic rotation and cleaning of the sampling cylinder. At the same time, the design of the partition plate, the circular plate and the adapter pipe makes the distribution of the sampling cavities more reasonable, can realize uniform counterweight, avoid the inclination of the sampling device, in addition, the combination of the silica gel strip and the cleaning frame, and the inflation and deflation of the deformation bag make the cleaning assembly more closely and effectively when cleaning the outer wall of the sampling cylinder. At the same time, the small air pump is used to suck the deformation bag, which realizes the cleaning of the impurities on the scraping surface of the silica gel strip, further improves the cleaning effect, and the design of the sealing plate also avoids the residual impurities falling into the upper liquid inlet hole, ensuring the purity of the sampling. BRIEF DESCRIPTION OF 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 an internal structure diagram of the sampling cylinder of the first embodiment of the present application;

[0021] Figure 3 It is an internal diagram of the sampling inner cylinder of the first embodiment of the present application;

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

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

[0024] Figure 6 Installation diagram of partition plate, round plate and adapter pipe for the first embodiment of the present application;

[0025] Figure 7 Plan view of partition plate, round plate and adapter pipe for the first embodiment of the present application (only one adapter pipe is drawn for convenience);

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

[0027] Figure 9 Composition diagram of cleaning assembly for the second embodiment of the present application;

[0028] Figure 10 Sectional view of cleaning assembly for the second embodiment of the present application;

[0029] Figure 11 State diagram of deaeration of deformation bag in cleaning assembly for the second embodiment of the present application;

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

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

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

[0033] Explanation of figure numbers:

[0034] 1, sampling cylinder; 2, discharging rope; 3, small air pump; 4, cleaning assembly; 5, sealing bottom plate; 6, sampling inner cylinder; 7, lower baffle plate; 8, upper baffle plate; 81, sealing plate; 82, magnetically driven rack; 83, electromagnetic block; 9, connecting rod; 91, rotating rod; 92, small reducer; 10, driving motor; 11, gear ring; 12, inner column; 13, partition plate; 131, round plate; 132, adapter pipe; 41, cleaning frame; 42, silica gel strip; 43, deformation bag; 44, constraint block; 14, rotating motor. DETAILED DESCRIPTION

[0035] Two embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] The first embodiment is as follows:

[0037] Figures 1-5 An underground water monitoring device for environmental engineering is shown, which comprises a sampling cylinder 1 and a monitoring instrument, the bottom of the sampling cylinder 1 is threadedly connected with a sealing bottom plate 5, the top of the sealing bottom plate 5 is fixedly installed with a sampling inner cylinder 6, the inside of the sampling inner cylinder 6 is installed with an inner column 12, the inner column 12 is embeddedly installed with a rotating motor 14 near the top end, the output end of the rotating motor 14 is connected with a connecting rod 9, the tail end of the connecting rod 9 is connected with a small speed reducer 92, the output end of the small speed reducer 92 is connected with a rotating rod 91, the top of the rotating rod 91 is detachably connected with a discharging rope 2, the surface of the rotating rod 91 is inserted with symmetrically arranged cleaning assemblies 4, and the surface of the connecting rod 9 is fixedly sleeved with an upper baffle plate 8.

[0038] Figures 6-7 The surface of the inner column 12 is fixedly installed with a plurality of partition plates 13, the number of the partition plates 13 is even, and two adjacent partition plates 13 and the inner wall of the sampling inner cylinder 6 form a sampling cavity, the surface of the inner column 12 is sleeved with a circular plate 131, and the circular plate 131 divides each sampling cavity into two equal parts, and each sampling cavity is installed with an adapter pipe 132, one end of the adapter pipe 132 extends into another sampling cavity below the circular plate 131, and the connecting line of the sampling cavities at both ends of the adapter pipe 132 passes through the center of the inner column 12.

[0039] The connecting position of the circular plate 131 and the partition plate 13 is located at the midpoint of the partition plate 13 in the vertical direction, the adapter pipe 132 penetrates the inner column 12, and the connecting position of the adapter pipe 132 and the inner column 12 is located below the rotating motor 14, the inside of the sampling cylinder 1 is installed with a small air pump 3 with the same weight as the driving motor 10, and 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 and the rotating rod 91 are connected by bolts, which are detachably connected, so when the sampling inner cylinder 6 needs to be taken out later, the cleaning assembly 4 can be first detached from the surface of the rotating rod 91, then the detachably connected discharging rope 2 (which can be connected by buckles or tied, selected according to the actual situation, not fixedly limited) is separated from the rotating rod 91, and then the sealing bottom plate 5 is removed, and with the removal of the sealing bottom plate 5, the sampling inner cylinder 6 and the upper baffle plate 8 and the lower baffle plate 7 are separated from the inside of the sampling cylinder 1.

[0041] When sampling, the sampling cylinder 1 is lowered to a set depth in the water body by using the discharge rope 2, then the rotating motor 14 is started to drive the connecting rod 9 to rotate, and under the action of the small speed reducer 92, the upper baffle plate 8 and the cleaning assembly 4 can be at different rotating speeds, so that the upper baffle plate 8 can be synchronously cleaned by the cleaning assembly 4 during rotation. The cleaning assembly 4 is provided with two groups, so that when the upper baffle plate 8 does not rotate for one week, the cooperation of the two cleaning assemblies 4 can comprehensively scrape and clean the outer wall of the sampling cylinder 1, and the time node of one cleaning cycle of the outer wall of the sampling cylinder 1 by the two cleaning assemblies 4 is earlier than the time node of the coincidence of the inlet hole in the upper baffle plate 8 and the inlet hole in the lower baffle plate 7, so that during sampling, the algae or other impurities and foreign matters adhered to the outer wall of the sampling cylinder 1 during the sinking process can be prevented from entering the sampling cavity.

[0042] Figure 8 As shown, when the two inlet holes coincide, the water in the sampling water body (even if the sampling water body contains algae, silt and other foreign matters, it can also enter smoothly and will not be intercepted, which can maximize the integrity of the detection result) can enter the corresponding sampling cavity smoothly (because the space of the sampling cavity is limited by the sampling effect, the time for the water to enter and fill the occupied space is not long, and each sampling cavity in the present application is composed of upper and lower sub-sampling cavities arranged in a staggered manner, so that the water will first enter the lower sub-sampling cavity after entering, but will be filled soon, and then the upper sub-sampling cavity will be filled with the sample water, and the short time difference caused by the uneven counterweight is ignored), at this time, due to the existence of the adapter pipe 132, there is sampling water in the staggered arranged upper and lower sub-sampling cavities, and the spaces of the staggered arranged upper and lower sub-sampling cavities are the same, and the two sub-sampling cavities (the whole sampling cavity is arranged in an even number, for example, six sampling cavities, after being marked counterclockwise, the No. 1 sampling cavity is actually located on the upper part of the circular plate 131 and the No. 4 sampling cavity is located on the lower part of the circular plate 131, and the two separated parts are in an axisymmetric relationship), so that the counterweight effect can be achieved.

[0043] Compared with the inclination of the sampling device caused by the sampling in each sampling cavity in sequence (for example, six sampling cavities, after being marked counterclockwise, the No. 1 cavity is sampled, and the No. 4 cavity which is axisymmetric with the No. 1 cavity has no sample arrangement, so that the six sampling cavities are in an uneven weight distribution state), which further causes the difference in the depth of the sample water layer during sampling to expand the detection error, the present application can realize uniform counterweight by adjusting the distribution state of the sampling cavities through the cooperation of the adapter pipe 132 and the circular plate 131.

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

[0045] The connecting rod 9 is rotatably connected with the lower baffle plate 7, the inside of the upper baffle plate 8 and the lower baffle plate 7 is provided with a through liquid inlet hole, after the rotating motor 14 drives the upper baffle plate 8 to rotate and stagger with the liquid inlet hole on the surface of the lower baffle plate 7, the rotating motor 14 continues to rotate until the liquid inlet holes on the surfaces of the upper baffle plate 8 and the lower baffle plate 7 are overlapped.

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

[0047] Specifically, when the driving motor 10 is started, the gear and the gear ring 11 are engaged to drive the sampling inner cylinder 6 to rotate by a certain angle, so that the sampling cavities are adjusted one by one, and because the fitting blocks are matched with the fitting grooves, the lower baffle plate 7 is matched and restricted with the sampling cylinder 1, so that the liquid inlet hole on the surface of the lower baffle plate 7 remains stationary when the sampling inner cylinder 6 rotates, thereby realizing the stationary position of the liquid inlet hole when the sampling cavity changes.

[0048] The surface of each adapter pipe 132 is provided with an ultrasonic vibrator, and the inside of each sampling cavity located below the circular plate 131 is provided with a liquid level sensor, and each liquid level sensor is signal connected with the ultrasonic vibrator.

[0049] Specifically, because the sampling water body will inevitably be mixed with foreign matters such as silt, if the adapter pipe 132 is blocked, the weight of the sampling water body at both ends of the adapter pipe 132 will be inconsistent (the water quantity below is less than that above), at this time the liquid level sensor can detect that the sampling cavity below is not full, and it can be inferred that the adapter pipe 132 is in a blocked state, at this time the ultrasonic vibrator starts to vibrate and clean the adapter pipe 132, thereby playing a role in dredging the pipeline.

[0050] Figure 13 As shown, the inner wall of the liquid inlet hole in the upper baffle plate 8 is provided with a sealing plate 81 through a shaft, the surface of the shaft is provided with a gear part, the inside of the upper baffle plate 8 is provided with a strip-shaped groove, the inner wall of the strip-shaped groove is provided with an electromagnetic block 83, the inside of the strip-shaped groove is slidably connected with a magnetic gear rack 82, and the magnetic gear rack 82 is engaged with the gear part.

[0051] Specifically, the cleaning assembly 4 is in operation, the impurities on the surface of the upper baffle plate 8 are cleaned and fall into the liquid inlet hole in the upper baffle plate 8, and then fall into the new sampling cavity when the liquid inlet hole in the upper baffle plate 8 coincides with the liquid inlet hole in the lower baffle plate 7. To avoid the above phenomenon, the movable sealing plate 81 is used to make up for it.

[0052] When the two liquid inlet holes coincide, the electromagnetic block 82 and the magnetic driving rack 83 cooperate to drive the gear to rotate, thereby driving the sealing plate 81 to rotate to the vertical state (as shown in Figure 14 After sampling is completed, the electromagnetic block 82 and the magnetic driving rack 83 cooperate to drive the gear to rotate in the opposite 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 baffle plate 8 (which can also prevent foreign matter from entering during this period), thereby avoiding the falling of the residual impurities cleaned into the upper liquid inlet hole when the cleaning assembly 4 is in operation.

[0053] Second embodiment:

[0054] Figures 9-10 The cleaning assembly 4 includes a cleaning frame 41, the inner wall of the cleaning frame 41 is connected with a silica gel strip 42 protruding from the top of the cleaning frame 41, a deformed bag 43 is installed in the cavity formed by the silica gel strip 42 and the inner wall of the cleaning frame 41, the deformed bag 43 is made of polyvinylidene chloride film, and the end of the deformed bag 43 away from the inner wall of the cleaning frame 41 is fixedly connected with a constraint block 44.

[0055] The output end of the small air pump 3 is connected with a branch hose, the tail end of the branch hose is sealingly connected with each deformed bag 43, the silica gel strip 42 is in contact with the surface of the sampling cylinder 1, the sealing bottom plate 5 and the upper baffle plate 8 in the inflated state in the deformed bag 43, and 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 baffle plate 8 in the deflated state in the deformed bag 43, and the silica gel strip 42 still protrudes from the top of the cleaning frame 41.

[0056] Different from the first embodiment, the cleaning assembly 4 in the first embodiment is improved in this embodiment. When the sampling water flow rate is low (close to zero), impurities will accumulate on the scraping surface of the cleaning assembly 4 during scraping of the impurities on the surface of the sampling cylinder 1, the sealing bottom plate 5 and the upper baffle plate 8. When sampling, part of the impurities on the scraping surface of the cleaning assembly 4 will inevitably spread into the liquid inlet, causing sample pollution. In this embodiment, the part of the silica gel strip 42 in contact with the cleaning frame 41 is fixedly connected.

[0057] Specifically, in the initial state, the small air pump 3 (a pump that can be operated by suction) is used to inflate the deformation bag 43. The deformation bag 43 is made of polyvinylidene chloride film (other materials with similar properties can also be used), and has poor tensile properties. Therefore, after inflation, the constraint block 44 can constrain the silica gel strip 42 to a rectangular end state, facilitating attachment to the outer wall of the sampling cylinder 1, so that the silica gel strip 42 can clean in the state of protruding from the cleaning frame 41.

[0058] The time point when the liquid inlet hole in the upper baffle plate 8 coincides with the liquid inlet hole of the lower baffle plate 7 is marked as T, and the time point when the cleaning assembly 4 has cleaned the inner wall of the sampling cylinder 1 for one week is marked as N (N is before T, and the specific reason has been explained in the first embodiment). A time point M is selected within the value range (N, T). At this time, the small air pump 3 is used to suck out the gas in the deformation bag 43, so that the deformation bag 43 collapses (as shown in Figure 11 The end of the silica gel strip 42 loses the constraint of the constraint block 44 and becomes an arched state, and the arched part has a gap with the outer wall of the sampling cylinder 1. At this time, the rotating motor 14 is quickly and reversely rotated (the duration is short, and the weight of the cleaning assembly 4 is less than that of the sampling cylinder 1, so the quick and reverse rotation has little effect on the sampling cylinder 1), which drives the cleaning assembly 4 to swing (as shown in Figure 12 The impurities and foreign matters on the surface of the silica gel strip 42 are cleaned. Then, the discharge rope 2 drives the sampling cylinder 1 to tilt and shake to transfer the impurities and foreign matters on the top of the sampling cylinder 1 cleaned by the silica gel strip 42. After that, the discharge rope 2 drives the sampling cylinder 1 to translate a small distance (still in the same depth of the sampling water body, the purpose of translation is mainly to avoid the impurities and foreign matters cleaned by shaking from being sampled, and the distance of translation is greater than the diameter of the sampling cylinder 1). Then, the rotating motor 14 continues to rotate to drive the two liquid inlet holes to coincide.

[0059] In summary, the cooperation of the inner column 12, the rotating motor 14, the connecting rod 9, the small reducer 92, the rotating rod 91 and other components in the inner cylinder 6 realizes the automatic rotation and cleaning of the sampling cylinder 1. The design of the partition plate 13, the circular plate 131 and the adapter pipe 132 makes the distribution of the sampling chamber more reasonable, and can realize uniform counterweight and avoid the inclination of the sampling device. In addition, the combination of the silica gel strip 42 and the cleaning frame 41, and the inflation and deflation of the deformation bag 43 make the cleaning assembly 4 more closely and effectively clean the outer wall of the sampling cylinder 1. The use of the small air pump 3 to suck the deformation bag 43 realizes the cleaning of the impurities and foreign matters on the surface of the silica gel strip 42, further improves the cleaning effect, and the design of the baffle plate 81 also avoids the residual impurities from falling into the upper liquid inlet hole, ensuring the purity of the sampling.

[0060] The above-mentioned embodiments of the present application are combined with the current actual demand, the protection scope is not limited to this, various changes made within the knowledge range of the person skilled in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. A groundwater monitoring device for environmental engineering, comprising a sampling barrel (1) and a monitoring instrument, characterized in that: The bottom of the sampling cylinder (1) is threadedly connected with a sealing bottom plate (5), the top of the sealing bottom plate (5) is fixedly installed with a sampling inner cylinder (6), the inside of the sampling inner cylinder (6) is installed with an inner column (12), the position close to the top end of the inner column (12) is embeddedly installed with a rotating motor (14), the output end of the rotating motor (14) is connected with a connecting rod (9), the tail end of the connecting rod (9) is connected with a small reducer (92), the output end of the small reducer (92) is connected with a rotating rod (91), the top of the rotating rod (91) is detachably connected with a discharging rope (2), the surface of the rotating rod (91) is inserted with symmetrically arranged cleaning assemblies (4), the surface of the connecting rod (9) is fixedly sleeved with an upper baffle plate (8). The surface of the inner column (12) is fixedly installed with a plurality of partition plates (13), the number of the partition plates (13) is even, two adjacent partition plates (13) and the inner wall of the sampling inner cylinder (6) form a sampling cavity, the surface of the inner column (12) is sleeved with a circular plate (131), the circular plate (131) divides each sampling cavity into two equal parts, the inside of each sampling cavity is installed with an adapter pipe (132), one end of the adapter pipe (132) extends into another sampling cavity below the circular plate (131), and the connecting line of the sampling cavities at the two ends of the adapter pipe (132) passes through the center of the inner column (12). The connecting position of the circular plate (131) and the partition plate (13) is located at the midpoint of the partition plate (13) in the vertical direction, the adapter pipe (132) penetrates the inner column (12), and the connecting position of the adapter pipe (132) and the inner column (12) is located below the rotating motor (14).

2. The groundwater monitoring device for environmental engineering according to claim 1, characterized in that: The inner wall of the sampling inner cylinder (6) is rotatably installed with a lower baffle plate (7) protruding from the inside of the sampling inner cylinder (6) at a position close to the top end, and the protruding surface of the lower baffle plate (7) is installed with symmetrically arranged fitting blocks, the top wall of the sampling cylinder (1) is provided with a circular notch, the inner wall of the circular notch is provided with a fitting groove matched with the fitting blocks, 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 baffle plate (8).

3. The groundwater monitoring device for environmental engineering according to claim 2, characterized in that: The connecting rod (9) and the lower baffle plate (7) are rotatably connected, the inside of the upper baffle plate (8) and the lower baffle plate (7) is provided with a through liquid inlet hole, after the rotating motor (14) drives the upper baffle plate (8) to rotate and stagger with the liquid inlet hole on the surface of the lower baffle plate (7), the rotating motor (14) continues to rotate until the liquid inlet holes on the surfaces of the upper baffle plate (8) and the lower baffle plate (7) coincide.

4. 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), the inside of the sampling cylinder (1) is installed with a small air pump (3) with the same weight as the driving motor (10), and the connecting line of the small air pump (3) and the driving motor (10) passes through the center of the inner column (12).

5. The groundwater monitoring device for environmental engineering according to claim 1, characterized in that: The surface of each adapter pipe (132) is mounted with an ultrasonic vibrator, each sampling cavity is mounted with a liquid level sensor inside the space below the circular plate (131), and each liquid level sensor is connected with the ultrasonic vibrator.

6. The groundwater monitoring device for environmental engineering according to claim 4, characterized in that: The cleaning assembly (4) comprises a cleaning frame (41), the inner wall of the cleaning frame (41) is connected with a silica gel strip (42) protruding from the top of the cleaning frame (41), a deformation bag (43) is mounted in the cavity formed by the silica gel strip (42) and the inner wall of the cleaning frame (41), the deformation bag (43) is made of polyvinylidene chloride film, and the end of the deformation bag (43) away from the inner wall of the cleaning frame (41) is fixedly connected with a constraint block (44).

7. The groundwater monitoring device for environmental engineering according to claim 6, characterized in that: The output end of the small air pump (3) is connected with a branch hose, the tail end of the branch hose is in penetrating sealing connection with each deformation bag (43), the silica gel strip (42) is in contact with the surface of the sampling cylinder (1), the sealing bottom plate (5) and the upper blocking plate (8) in the inflated state in the deformation bag (43), and 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 blocking plate (8) in the deflated state in the deformation bag (43), and the silica gel strip (42) still protrudes from the top of the cleaning frame (41).

8. The groundwater monitoring device for environmental engineering according to claim 3, characterized in that: The inner wall of the liquid inlet hole in the upper blocking plate (8) is mounted with a sealing plate (81) through a shaft, the surface of the shaft is mounted with a gear part, the inner part of the upper blocking plate (8) is provided with a strip-shaped groove, the inner wall of the strip-shaped groove is mounted with an electromagnetic block (83), the inner part of the strip-shaped groove is in sliding connection with a magnetic gear rack (82), and the magnetic gear rack (82) is in meshing connection with the gear part.

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