A stratified sampling device for groundwater circulation monitoring wells

Abstract

The present invention belongs to the technical field of sampling in monitoring wells, and discloses a stratified sampling device for groundwater circulation monitoring wells, including a support ring and a telescopic support leg hingedly arranged in an array at its lower part, a guide retractable wire assembly being arranged on the upper wall of the support ring, a stratified sampling rotary transmission mechanism being arranged on the guide retractable wire assembly, a stratified sampling release mechanism being arranged on one side of the upper wall of the stratified sampling rotary transmission mechanism, and a communicating vessel pressure difference self-priming sampling mechanism being arranged inside the stratified sampling rotary transmission mechanism. The present invention has a high degree of automation, is easy to operate, has no sampling blind spot, causes little disturbance in the monitoring well, and can complete water quality sampling at different depths in the monitoring well at one time.

Description

Technical Field

[0001] The invention belongs to the technical field of monitoring well sampling, and specifically refers to a stratified sampling device for groundwater circulation monitoring wells. Background Art

[0002] Groundwater is closely related to human production and life. As one of the sources of domestic water, industrial water and farmland irrigation water, it is an important natural resource. However, the production activities of industrial enterprises may cause soil and groundwater to be polluted. If the contaminated land is directly developed and utilized, it will bring potential risks to human health.

[0003] After the groundwater monitoring well is established, it is necessary to wash the well before sampling, and the well washing should meet the relevant requirements of HJ25.2, HJ1019, etc. Use a portable water quality meter to measure the effluent on site until the turbidity, conductivity, pH value, etc. of the effluent meet the requirements.

[0004] Among the current groundwater sampling methods, the two commonly used methods are low-speed sampling and Baylor tube sampling, which use groundwater mechanical sampling equipment (submersible pump) and groundwater manual sampling equipment (Baylor tube) respectively. When sampling the water quality in the monitoring well, the following problems may occur:

[0005] 1. Groundwater mechanical sampling equipment is expensive, larger in size and weight, and inconvenient to carry and operate. In addition, groundwater monitoring wells are often located in places where it is not convenient to get electricity. Submersible pumps are inconvenient to use and require a larger energy source.

[0006] 2. When using groundwater mechanical sampling equipment, since there will be water in the sampling water pipe, after pumping up water from different depths, it is impossible to determine the amount of water in the sampling water pipe. If the water in the sampling water pipe cannot be pumped out cleanly, water from different depths will be mixed, and sampling of water from different depths cannot be achieved;

[0007] 3. The sampling of the Beyler tube requires the cooperation of multiple people, and the degree of automation is low. The sampling cannot be completed in one go, and the operation is cumbersome. In addition, the Beyler tube has a certain length. When the Beyler tube goes deep into the monitoring well to take samples, the sampling depth may be limited due to the length of the Beyler tube, and there will be a blind spot in the sampling depth;

[0008] 4. The existing monitoring well sampling devices cause great disturbance to groundwater and cannot guarantee the accuracy of sampling data. Summary of the invention

[0009] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a stratified sampling equipment for groundwater circulation monitoring wells, which has a high degree of automation, is easy to operate, has no sampling blind spots, causes little disturbance in the monitoring well, and can complete water quality sampling at different depths in the monitoring well at one time.

[0010] The technical solution adopted by the present invention is as follows: The present invention proposes a stratified sampling device for groundwater circulation monitoring wells, including a support ring and telescopic support legs hingedly arranged in an array at its lower part, a guide retractable line assembly being provided on the upper wall of the support ring, a stratified sampling rotary transmission mechanism being provided on the guide retractable line assembly, a stratified sampling release mechanism being provided on one side of the upper wall of the stratified sampling rotary transmission mechanism, and a communicating vessel pressure difference self-priming sampling mechanism being provided inside the stratified sampling rotary transmission mechanism.

[0011] Preferably, the guide wire-retracting and -releasing assembly comprises a supporting upright plate, a retracting and -releasing rotating shaft, a wire-retracting drum, a lifting rope, a guiding support rod, a guiding pulley and a retracting and -releasing motor, the supporting upright plates being symmetrically arranged on the upper wall of the supporting ring, one end of the retracting and -releasing rotating shaft being arranged on the inner side wall of one of the supporting upright plates, the other end of the retracting and -releasing rotating shaft being protruding from the inner side wall of the other supporting upright plate, the retracting and -releasing motor being arranged on the outer side wall of the supporting upright plate, the retracting and -releasing motor being connected to the retracting and -releasing rotating shaft, the wire-retracting drum being arranged on the middle part of the retracting and -releasing rotating shaft, the guiding support rod being arranged between the inner side walls of the two supporting upright plates, the guiding pulley being arranged on the middle part of the guiding support rod, one end of the lifting rope being wound around the wire-retracting drum, the other end of the lifting rope being passed around the guiding pulley, and the lifting rope being placed on the center line of the supporting ring through the guiding pulley.

[0012] Preferably, the layered sampling rotary transmission mechanism includes a counterweight support disk, a sampling rotary motor, a floating disk, a sampling driving gear, a sampling rotary internal gear disk, a sampling rotary shaft, a connecting column and a counterweight base plate. The middle portion of the upper wall of the counterweight support disk is arranged at the other end of the suspension rope, the floating disk is arranged on the lower wall of the counterweight support disk, the sampling rotary shaft is penetrated by the counterweight support disk and the floating disk, the sampling driving gear is arranged on the lower wall of the floating disk, the sampling driving gear is arranged on the sampling rotary shaft, the sampling rotary internal gear disk is rotatably arranged on the lower wall of the floating disk, the sampling driving gear is meshed with the sampling rotary internal gear disk, the connecting column array is arranged on the lower wall of the floating disk, the counterweight base plate is arranged at the lower end of the connecting column, the sampling rotary motor is arranged on the upper wall of the counterweight support disk, and the sampling rotary motor is connected to the sampling rotary shaft.

[0013] Preferably, the layered sampling release mechanism includes a placement rack, an automatic reel, a sampling water pipe, a sampling counterweight ball, a measuring rope and a winding pulley, the placement rack is arranged at the upper wall edge of the counterweight support plate, the automatic reel is arranged on the placement rack, the sampling water pipe is wound on the automatic reel, the sampling counterweight ball is hollowed out, the sampling counterweight ball is arranged at the movable end of the sampling water pipe, the winding pulley is arranged on the guide support rod, one end of the measuring rope is arranged on the sampling counterweight ball, and the other end of the measuring rope is passed around the winding pulley, and the descent of the sampling counterweight ball drives the descent of the measuring rope, so the descent depth can be conveniently measured by measuring the descent length of the rope, which is convenient for sampling water quality at different depths.

[0014] In order to automatically complete sampling and make the water sample in the sampling water pipe flow out in time after sampling at different depths is completed to avoid mixing of water samples at different depths, the communicating vessel pressure difference self-sampling mechanism includes a sampling cylinder, a cleaning cylinder, a lower pressure plate, a support control body, a support sleeve, an upper compression spring, a control slide column, a baffle ball, an upper baffle plate, a control ball, a connecting slide column, a lower compression spring, a connecting sleeve, a cut-off column, a supporting middle plate and supporting ribs. The sampling cylinder is arranged in a hollow cavity with an opening at the lower end. The array of the sampling cylinder is arranged on the lower wall of the sampling rotating inner toothed disk. The cleaning cylinder is arranged in a hollow cavity with an opening at the lower end. The array of cleaning cylinders is arranged on the lower wall of the sampling rotating inner gear disk, the sampling cylinder and the cleaning cylinder are arranged at intervals, the support control body is arranged in a conical tubular shape, the support control body is arranged at the lower ends of the sampling cylinder and the cleaning cylinder, the support sleeve is arranged in a hollow cavity with openings at both ends, the support sleeve is arranged at the upper end opening of the support control body, the upper compression spring is arranged on the upper end surface of the support sleeve, the upper baffle is arranged on the upper end of the upper compression spring, the upper end of the control slide column is arranged on the lower wall of the upper baffle, the control slide column penetrates the upper compression spring, the lower end of the control slide column penetrates the support sleeve, the The blocking ball is arranged at the lower end of the control sliding column, and the blocking ball is arranged at the lower part of the supporting sliding sleeve. The lower pressure plate is arranged on the outer wall of the lower end of the supporting control body. The upper wall of the counterweight bottom plate is provided with a placement groove, and the inner bottom wall of the placement groove is provided with an installation groove. The connecting sliding sleeve is arranged in the installation groove, and the lower end of the lower clamping spring is arranged on the inner bottom wall of the placement groove. The control ball is arranged at the upper end of the lower clamping spring, and the upper end of the connecting sliding column controls the lower part of the ball. The connecting sliding column passes through the lower clamping spring, and the lower end of the connecting sliding column is slidably arranged in the connecting sliding sleeve. The supporting rib array is arranged on the inner wall of the lower end of the connecting sliding sleeve. The supporting middle plate is arranged on the supporting rib, and the supporting middle plate is arranged in the middle part of the connecting sliding sleeve, and the lower end of the cutting column is arranged at the center of the upper wall of the supporting middle plate, and a water hole 1 is arranged at the center of the control sliding column and the baffle ball, and one end of the water hole 1 penetrates the side wall of the control sliding column, and the other end of the water hole 1 penetrates the lower wall of the baffle ball, and a docking groove is arranged on the top of the outer wall of the control ball, and the docking groove cooperates with the baffle ball, and a water hole 2 is arranged at the center of the control ball and the connecting sliding column, and the upper end of the water hole 2 penetrates in the docking groove, and the lower end of the water hole 2 penetrates the lower end surface of the connecting sliding column.

[0015] When the sampling tube rotates, the depth of the placement groove is greater than or equal to the diameter of the control ball, and the control ball can press the downward pressure spring downward, so that the control ball completely enters the placement groove.

[0016] Wherein, the fixed end of the sampling water pipe is arranged on the lower wall of the counterweight bottom plate, and the sampling water pipe is connected to the lower end of the connecting sleeve.

[0017] In order to balance the pressure inside the sampling cylinder and the cleaning cylinder during automatic water suction sampling, a balanced one-way valve is provided on the upper part of the outer wall of the sampling cylinder and the cleaning cylinder.

[0018] In addition, drain valves are provided at the lower parts of the outer walls of the sampling cylinder and the cleaning cylinder to facilitate the discharge of the sampled water and waste water after the sampling is completed.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] 1. In the pressure differential self-sampling mechanism of the communicating vessel, the sampling tube and the cleaning tube enter below the water surface in the monitoring well under the action of the floating plate and the counterweight chassis. When the sampling tube rotates to the control ball under the action of the sampling rotating inner gear plate, the control ball is pushed upward by the action of the lower compression spring, and then the control ball enters the supporting control body, and at this time the blocking ball enters the docking groove, the control ball squeezes the blocking ball upward, and the blocking ball drives the control sliding column to move upward. At this time, the upper end of the water hole 1 slides out of the supporting sliding sleeve, and the water hole 1 and the water hole 2 are aligned. The control ball drives the connecting sliding column to move upward, and the closing column Slide out from the second water hole. At this time, since the sampling cylinder is empty, according to the communicating vessel principle, the water surface in the sampling cylinder and the water surface in the monitoring well should be flush. Therefore, the water of the first sampling depth automatically enters the communicating sleeve from the sampling weight ball through the sampling water pipe. When the cleaning cylinder is facing the control ball, repeat the above operation. The water of the second sampling depth flushes the water sample in the original sampling water pipe into the cleaning cylinder, preparing for the second sampling cylinder to collect the water of the second sampling depth, until all the sampling cylinders collect water samples of different depths respectively, avoiding the mixing of water samples of different depths.

[0021] 2. Tie one end of the measuring rope to the sampling weight ball. The sinking of the sampling weight ball will drive the lowering of the measuring rope, so the sampling depth of the sampling weight ball can be easily controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a groundwater circulation monitoring well stratified sampling device proposed by the present invention;

[0023] Figure 2 A three-dimensional structural schematic diagram of a stratified sampling rotary transmission mechanism and a communicating vessel pressure difference self-sampling mechanism of a stratified sampling device for groundwater circulation monitoring wells proposed by the present invention;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of a stratified sampling rotary transmission mechanism of a stratified sampling device for groundwater circulation monitoring wells proposed by the present invention;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a connecting vessel pressure difference self-sampling mechanism of a groundwater circulation monitoring well stratified sampling device proposed by the present invention;

[0026] Figure 5 for Figure 4 Enlarged view of part A.

[0027] Among them, 1. support ring, 2. telescopic support leg, 3. guide retractable wire assembly, 4. layered sampling rotation transmission mechanism, 5. layered sampling release mechanism, 6. communicating vessel pressure difference self-sampling mechanism, 7. support vertical plate, 8. retractable rotating shaft, 9. wire-releasing drum, 10. hanging rope, 11. guide support rod, 12. guide pulley, 13. retractable motor, 14. counterweight support plate, 15. sampling rotating motor, 16. floating plate, 17. sampling driving gear, 18. sampling rotating inner gear plate, 19. sampling rotating shaft, 20. connecting column, 21. counterweight bottom plate, 22. placement rack, 23. automatic reel, 24. , sampling water pipe, 25, sampling counterweight ball, 26, measuring rope, 27, winding pulley, 28, sampling cylinder, 29, cleaning cylinder, 30, lower pressure plate, 31, support control body, 32, support sleeve, 33, upper compression spring, 34, control slide column, 35, baffle ball, 36, upper baffle plate, 37, control ball, 38, connecting slide column, 39, lower compression spring, 40, connecting sleeve, 41, stop column, 42, support middle plate, 43, support rib, 44, placement groove, 45, installation groove, 46, water hole one, 47, docking groove, 48, balance check valve, 49, drain valve, 50, water hole two.

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0031] like Figure 1As shown, the present invention proposes a stratified sampling device for groundwater circulation monitoring wells, including a support ring 1 and a telescopic support leg 2 hingedly arranged in an array at its lower part, the upper wall of the support ring 1 is provided with a guide retractable wire assembly 3, the guide retractable wire assembly 3 is provided with a stratified sampling rotating transmission mechanism 4, a stratified sampling release mechanism 5 is provided on one side of the upper wall of the stratified sampling rotating transmission mechanism 4, and a communicating vessel pressure difference self-priming sampling mechanism 6 is provided inside the stratified sampling rotating transmission mechanism 4.

[0032] like Figure 1 The guide wire-retracting and -releasing assembly 3 comprises a supporting upright plate 7, a retracting and -releasing rotating shaft 8, a wire-retracting drum 9, a suspension rope 10, a guiding support rod 11, a guiding pulley 12 and a retracting and -discharging motor 13. The supporting upright plate 7 is symmetrically arranged on the upper wall of the supporting ring 1, one end of the retracting and -releasing rotating shaft 8 is arranged on the inner side wall of one of the supporting upright plates 7, and the other end of the retracting and -releasing rotating shaft 8 protrudes from the inner side wall of the other supporting upright plate 7, and the retracting and -discharging motor 13 is arranged on the outer side wall of the supporting upright plate 7, and the retracting and -discharging motor 13 is connected to the retracting and -releasing rotating shaft 8, the wire-retracting and -releasing drum 9 is arranged in the middle part of the retracting and -releasing rotating shaft 8, the guiding support rod 11 is arranged between the inner side walls of the two supporting upright plates 7, and the guiding pulley 12 is arranged in the middle part of the guiding support rod 11, one end of the suspension rope 10 is wound around the wire-retracting drum 9, and the other end of the suspension rope 10 passes around the guiding pulley 12, and the suspension rope 10 can be placed on the center line of the supporting ring 1 through the guiding pulley 12.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, the stratified sampling rotation transmission mechanism 4 includes a counterweight support plate 14, a sampling rotation motor 15, a floating plate 16, a sampling driving gear 17, a sampling rotation inner gear plate 18, a sampling rotation shaft 19, a connecting column 20 and a counterweight bottom plate 21. The middle of the upper wall of the counterweight support plate 14 is arranged at the other end of the suspension rope 10, the floating plate 16 is arranged on the lower wall of the counterweight support plate 14, the sampling rotation shaft 19 is arranged through the counterweight support plate 14 and the floating plate 16, and the sampling driving gear 17 is arranged on the lower wall of the floating disk 16, the sampling driving gear 17 is arranged on the sampling rotating shaft 19, the sampling rotating inner gear disk 18 is rotatably arranged on the lower wall of the floating disk 16, the sampling driving gear 17 is meshed with the sampling rotating inner gear disk 18, the connecting column 20 array is arranged on the lower wall of the floating disk 16, the counterweight bottom plate 21 is arranged at the lower end of the connecting column 20, the sampling rotating motor 15 is arranged on the upper wall of the counterweight support disk 14, and the sampling rotating motor 15 is connected to the sampling rotating shaft 19.

[0034] like Figure 1 , Figure 2As shown, the stratified sampling release mechanism 5 includes a placement rack 22, an automatic reel 23, a sampling water pipe 24, a sampling counterweight ball 25, a measuring rope 26 and a winding pulley 27. The placement rack 22 is arranged at the upper wall edge of the counterweight support plate 14, the automatic reel 23 is arranged on the placement rack 22, the sampling water pipe 24 is wound on the automatic reel 23, the sampling counterweight ball 25 is hollowed out, the sampling counterweight ball 25 is arranged at the movable end of the sampling water pipe 24, the winding pulley 27 is arranged on the guide support rod 11, one end of the measuring rope 26 is arranged on the sampling counterweight ball 25, and the other end of the measuring rope 26 passes around the winding pulley 27. The descent of the sampling counterweight ball 25 drives the descent of the measuring rope 26. Therefore, the descent depth can be conveniently measured by measuring the descent length of the rope 26, which is convenient for sampling water quality at different depths.

[0035] like Figure 2 , Figure 4 , Figure 5As shown, in order to automatically complete sampling and make the water sample in the sampling water pipe 24 flow out in time after sampling at different depths is completed to avoid mixing of water samples at different depths, the communicating vessel pressure difference self-sampling mechanism 6 includes a sampling cylinder 28, a cleaning cylinder 29, a lower pressure plate 30, a support control body 31, a support sleeve 32, an upper compression spring 33, a control slide column 34, a baffle ball 35, an upper baffle plate 36, a control ball 37, a connecting slide column 38, a lower compression spring 39, a connecting sleeve 40, a cut-off column 41, a supporting middle plate 42 and a supporting rib 43. The sampling cylinder 28 is arranged in a hollow cavity with an opening at the lower end. The array of the sampling cylinders 28 is arranged on the lower wall of the sampling rotating inner toothed disk 18. The cleaning cylinder 29 is arranged in a hollow cavity with an opening at the lower end. The array is arranged on the lower wall of the sampling rotating inner gear disk 18, the sampling cylinder 28 and the cleaning cylinder 29 are arranged at intervals, the sampling cylinder 28 and the cleaning cylinder 29 can be marked, and the sampling cylinder 28 is numbered in sequence, the support control body 31 is arranged in a conical tubular shape, the support control body 31 is arranged at the lower end of the sampling cylinder 28 and the cleaning cylinder 29, the support sleeve 32 is arranged in a hollow cavity with two ends opened, the support sleeve 32 is arranged at the upper end opening of the support control body 31, the upper compression spring 33 is arranged on the upper end surface of the support sleeve 32, the upper baffle plate 36 is arranged at the upper end of the upper compression spring 33, the upper end of the control slide post 34 is arranged on the lower wall of the upper baffle plate 36, the control slide post 34 passes through the upper compression spring 33, the lower end of the control slide post 34 The end passes through the supporting sleeve 32, the blocking ball 35 is arranged at the lower end of the control sliding column 34, the blocking ball 35 is arranged at the lower part of the supporting sliding sleeve 32, the lower pressure plate 30 is arranged on the lower end outer wall of the supporting control body 31, the upper wall of the counterweight bottom plate 21 is provided with a placement groove 44, the inner bottom wall of the placement groove 44 is provided with an installation groove 45, the connecting sleeve 40 is arranged in the installation groove 45, the lower end of the lower compression spring 39 is arranged on the inner bottom wall of the placement groove 44, the control ball 37 is arranged at the upper end of the lower compression spring 39, the upper end of the connecting sliding column 38 controls the lower part of the ball 37, the connecting sliding column 38 passes through the lower compression spring 39, the lower end of the connecting sliding column 38 is slidably arranged in the connecting sliding sleeve 40, and the supporting rib 43 array is arranged at the lower end of the connecting sliding sleeve 40 The inner wall of the end, the supporting middle plate 42 is arranged on the supporting rib 43, the supporting middle plate 42 is arranged in the middle part of the connecting sleeve 40, the lower end of the stop column 41 is arranged at the center of the upper wall of the supporting middle plate 42, the center of the control sliding column 34 and the blocking ball 35 is provided with a water hole 46, one end of the water hole 46 penetrates the side wall of the control sliding column 34, and the other end of the water hole 46 penetrates the lower wall of the blocking ball 35, the top of the outer wall of the control ball 37 is provided with a docking groove 47, the docking groove 47 cooperates with the blocking ball 35, the control ball 37 and the connecting sliding column 38 are provided with a water hole 2 50, the upper end of the water hole 2 50 penetrates the docking groove 47, and the lower end of the water hole 2 50 penetrates the lower end surface of the connecting sliding column 38.

[0036] like Figure 5 As shown, when the sampling tube 28 rotates, the depth of the placement groove 44 is greater than or equal to the diameter of the control ball 37 , and the control ball 37 can press the downward pressure spring downward, so that the control ball 37 completely enters the placement groove 44 .

[0037] like Figure 5 As shown, the fixed end of the sampling water pipe 24 is arranged on the lower wall of the counterweight bottom plate 21 , and the sampling water pipe 24 is connected to the lower end of the communicating sliding sleeve 40 .

[0038] like Figure 4 As shown, in order to balance the pressure inside the sampling cylinder 28 and the cleaning cylinder 29 during automatic water suction sampling, a balancing one-way valve 48 is provided on the upper part of the outer wall of the sampling cylinder 28 and the cleaning cylinder 29 .

[0039] like Figure 4 , Figure 5 As shown, a drain valve 49 is provided at the lower part of the outer wall of the sampling cylinder 28 and the cleaning cylinder 29 to facilitate the discharge of the sampled water and waste water after the sampling is completed.

[0040] During specific use, the telescopic support legs 2 are supported on all sides of the monitoring well, and then the retractable and discharge motor 13 is turned on. The retractable and discharge motor 13 drives the retractable and discharge rotating shaft 8 to rotate, and the retractable and discharge rotating shaft 8 drives the pay-off drum 9 to rotate. The pay-off drum 9 releases the suspension rope 10. At this time, the counterweight base plate 21 descends into the monitoring well until the floating disk 16 floats on the water surface of the monitoring well. At this time, the length of the released suspension rope 10 can be recorded, and the water depth in the monitoring well can be calculated according to the depth of the monitoring well. Then, the equally divided sampling depth can be calculated, and then the automatic reel 23 is turned on, and the automatic reel 23 releases the sampling water pipe 24. The sampling counterweight ball 25 sinks under the action of gravity, and the equally divided sampling depth can be known according to the downward movement distance of the measuring rope 26. When the sampling counterweight ball 25 reaches the first When the sampling depth is reached, the automatic reel 23 stops releasing the sampling water pipe 24, and then the sampling rotating motor 15 is turned on. The sampling rotating motor 15 drives the sampling rotating shaft 19 to rotate, and the sampling rotating shaft 19 drives the sampling active gear 17 to rotate. The sampling active gear 17 drives the sampling rotating inner gear disc 18 to rotate, and the sampling rotating inner gear disc 18 drives the sampling cylinder 28 and the cleaning cylinder 29 to rotate. When the sampling cylinder 28 is facing the control ball 37, the control ball 37 is pushed upward by the lower compression spring 39, and then the control ball 37 enters the support control body 31, and at this time the blocking ball 35 enters the docking groove 47, and the control ball 37 squeezes the blocking ball 35 upward, and the blocking ball 35 drives the control sliding column 34 to move upward. At this time, the upper end of the water through hole 46 is pushed from the support sliding sleeve 3 2, the water hole 1 46 and the water hole 2 50 are aligned, the control ball 37 drives the connecting slide 38 to move upward, and the cut-off column 41 slides out from the water hole 2 50. At this time, since the sampling cylinder 28 is empty, according to the connecting vessel principle, the water surface in the sampling cylinder 28 and the water surface in the monitoring well should be flush. Therefore, the water of the first sampling depth automatically enters the connecting slide 40 from the sampling weight ball 25 through the sampling water pipe 24, and then enters the sampling cylinder 28 through the water hole 2 50 and the water hole 1 46 until the water surface in the sampling cylinder 28 and the water surface in the monitoring well are flush. The first sampling is completed, and then the sampling rotating motor 15 rotates, and the sampling rotating inner gear disc 18 drives the sampling cylinder 28 and the cleaning cylinder 29 to rotate. At this time, the sampling cylinder 28 drives the support The support control body 31 rotates, and the inner inclined surface of the support control body 31 presses the control ball 37 downward. The control ball 37 squeezes the lower compression spring 39, and the control ball 37 drives the connecting slide column 38 to move downward until the cut-off column 41 enters the water through hole 50. At this time, the cut-off column 41 blocks the water through hole 50, and the water in the sampling water pipe 24 cannot enter the water through hole 50. The support control body 31 moves out from the control ball 37. At this time, the lower pressure plate 30 continues to press the control ball 37 in the placement groove 44, and then the automatic reel 23 is started to release the sampling water pipe 24. According to the measuring rope 26, it is judged that the sampling counterweight ball 25 has reached the second sampling depth, and then the sampling rotating motor 15 is started again. The sampling rotating inner gear disc 18 drives the cleaning cylinder 29 to face the control ball 37.At this time, the control ball 37 enters the support control body 31 at the lower part of the cleaning cylinder 29 under the action of the lower compression spring 39. According to the above operation, the water hole 1 46 and the water hole 2 50 are aligned. Under the action of the lower compression spring 39, the control ball 37 drives the connecting slide 38 to move upward, and the cut-off column 41 slides out from the water hole 2 50 in the connecting slide 38. Since the cleaning cylinder 29 is empty, according to the connecting vessel principle, the water of the second sampling depth enters the connecting sleeve 40 from the sampling weight ball 25 through the sampling water pipe 24, and the water in the original sampling water pipe 24 is flushed into the cleaning cylinder 29. At this time, the sampling water pipe 24 is full of water samples of the second sampling depth, and then the sampling rotating motor 15 is started and opened, and the sampling rotating inner gear disk 18 drives the second sampling tube 28 to face the position of the control ball 37, and the above operation is repeated until the water samples of the second sampling depth fill the second sampling tube 28, and the above operation is repeated until all the sampling depths are completely sampled, and then the retracting and discharging motor 13 is turned on, and the pay-off drum 9 retracts the lifting rope 10, and the lifting rope 10 drives the counterweight support plate 14 to be lifted from the monitoring well, and then the waterproof valves on the sampling tube 28 are opened respectively to release water samples of different depths.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0043] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A stratified sampling device for groundwater circulation monitoring wells, comprising a support ring (1) and a telescopic support leg (2) hingedly arranged in an array at its lower part, characterized in that: The upper wall of the support ring (1) is provided with a guide retractable wire assembly (3), the guide retractable wire assembly (3) is provided with a stratified sampling rotary transmission mechanism (4), a stratified sampling release mechanism (5) is provided on one side of the upper wall of the stratified sampling rotary transmission mechanism (4), and a communicating vessel pressure difference self-sampling mechanism (6) is provided inside the stratified sampling rotary transmission mechanism (4); The guide retractable wire assembly (3) comprises a support vertical plate (7), a retractable rotating shaft (8), a wire pay-off drum (9), a suspension rope (10), a guide support rod (11), a guide pulley (12) and a retractable wire motor (13), wherein the support vertical plate (7) is symmetrically arranged on the upper wall of the support ring (1), one end of the retractable rotating shaft (8) is arranged on the inner side wall of one of the support vertical plates (7), and the other end of the retractable rotating shaft (8) protrudes from the inner side wall of another support vertical plate (7), and the retractable wire motor (13) is arranged on the outer wall of the supporting vertical plate (7), the retracting and discharging motor (13) is connected to the retracting and discharging rotating shaft (8), the pay-off drum (9) is arranged on the middle part of the retracting and discharging rotating shaft (8), the guide support rod (11) is arranged between the inner walls of the two supporting vertical plates (7), the guide pulley (12) is arranged on the middle part of the guide support rod (11), one end of the lifting rope (10) is wound around the pay-off drum (9), and the other end of the lifting rope (10) is passed around the guide pulley (12); The stratified sampling rotary transmission mechanism (4) comprises a counterweight support plate (14), a sampling rotary motor (15), a floating plate (16), a sampling driving gear (17), a sampling rotary internal gear plate (18), a sampling rotary shaft (19), a connecting column (20) and a counterweight bottom plate (21); the middle portion of the upper wall of the counterweight support plate (14) is arranged at the other end of the suspension rope (10); the floating plate (16) is arranged on the lower wall of the counterweight support plate (14); the sampling rotary shaft (19) is arranged through the counterweight support plate (14) and the floating plate (16); the sampling driving gear (17) is arranged on the upper wall of the counterweight support plate (14) and the floating plate (16); the sampling driving gear (17) is arranged on the upper wall of the counterweight support plate (14) and the floating plate (16); the sampling driving gear (17) is arranged on the upper wall of the counterweight support plate (14) and the floating plate (16); the sampling rotating shaft (19 ... 7) is arranged on the lower wall of the floating disk (16), the sampling driving gear (17) is arranged on the sampling rotating shaft (19), the sampling rotating inner toothed disk (18) is rotatably arranged on the lower wall of the floating disk (16), the sampling driving gear (17) is meshed with the sampling rotating inner toothed disk (18), the connecting column (20) array is arranged on the lower wall of the floating disk (16), the counterweight bottom plate (21) is arranged at the lower end of the connecting column (20), the sampling rotating motor (15) is arranged on the upper wall of the counterweight support disk (14), and the sampling rotating motor (15) is connected to the sampling rotating shaft (19); The layered sampling release mechanism (5) comprises a placement rack (22), an automatic wire reel (23), a sampling water pipe (24), a sampling counterweight ball (25), a measuring rope (26) and a winding pulley (27), wherein the placement rack (22) is arranged at the upper wall edge of the counterweight support plate (14), the automatic wire reel (23) is arranged on the placement rack (22), the sampling water pipe (24) is wound around the automatic wire reel (23), the sampling counterweight ball (25) is hollowed out, the sampling counterweight ball (25) is arranged at the movable end of the sampling water pipe (24), the winding pulley (27) is arranged on the guide support rod (11), one end of the measuring rope (26) is arranged on the sampling counterweight ball (25), and the other end of the measuring rope (26) is wound around the winding pulley (27); The communicating vessel pressure differential self-sampling mechanism (6) comprises a sampling cylinder (28), a cleaning cylinder (29), a lower pressure plate (30), a support control body (31), a support sleeve (32), an upper compression spring (33), a control slide column (34), a baffle ball (35), an upper baffle plate (36), a control ball (37), a communicating slide column (38), a lower compression spring (39), a communicating sleeve (40), a stop column (41), a support intermediate plate (42) and a support rib (43). The sampling cylinder (28) is arranged in the form of a hollow cavity with an opening at the lower end. The array of the sampling cylinders (28) is arranged on the lower wall of the sampling rotating inner toothed disk (18). The cleaning cylinder (29) is arranged in the form of a hollow cavity with an opening at the lower end. The array of the cleaning cylinders (29) is arranged on the lower wall of the sampling rotating inner toothed disk (18). The lower wall of the sampling rotating inner toothed disc (18), the sampling tube (28) and the cleaning tube (29) are arranged at intervals, the support control body (31) is arranged in a conical tubular shape, the support control body (31) is arranged at the lower ends of the sampling tube (28) and the cleaning tube (29), the support sleeve (32) is arranged in a hollow cavity with two ends open, the support sleeve (32) is arranged at the upper end opening of the support control body (31), the upper compression spring (33) is arranged on the upper end surface of the support sleeve (32), the upper baffle (36) is arranged at the upper end of the upper compression spring (33), the upper end of the control slide column (34) is arranged on the lower wall of the upper baffle (36), the control slide column (34) penetrates the upper compression spring (33), and the control slide column (34) ) passes through the supporting sleeve (32), the blocking ball (35) is arranged at the lower end of the control sliding column (34), the blocking ball (35) is arranged at the lower part of the supporting sliding column (32), the lower pressure plate (30) is arranged on the lower end outer wall of the supporting control body (31), the upper wall of the counterweight bottom plate (21) is provided with a placement groove (44), the inner bottom wall of the placement groove (44) is provided with a mounting groove (45), the connecting sliding sleeve (40) is arranged in the mounting groove (45), the lower end of the lower compression spring (39) is arranged on the inner bottom wall of the placement groove (44), the control ball (37) is arranged at the upper end of the lower compression spring (39), the upper end of the connecting sliding column (38) controls the lower part of the ball (37), and the connecting sliding column (38) passes through the lower compression spring ( 39), the lower end of the connecting slide column (38) is slidably arranged in the connecting slide sleeve (40), the supporting ribs (43) are arranged in an array on the inner wall of the lower end of the connecting slide sleeve (40), the supporting intermediate plate (42) is arranged on the supporting ribs (43), the supporting intermediate plate (42) is arranged in the middle of the connecting slide sleeve (40), the lower end of the stop column (41) is arranged at the center of the upper wall of the supporting intermediate plate (42), the control slide column (34) and the blocking ball (35) are provided with a water hole (46) at the center, one end of the water hole (46) penetrates the side wall of the control slide column (34), and the other end of the water hole (46) penetrates the lower wall of the blocking ball (35), and the top of the outer wall of the control ball (37) is provided with a docking groove (47),The docking groove (47) cooperates with the blocking ball (35), and a second water hole (50) is provided at the center of the control ball (37) and the connecting slide column (38). The upper end of the second water hole (50) penetrates the docking groove (47), and the lower end of the second water hole (50) penetrates the lower end surface of the connecting slide column (38).

2. The groundwater circulation monitoring well stratified sampling device according to claim 1 is characterized in that: The depth of the placement groove (44) is greater than or equal to the diameter of the control ball (37).

3. The groundwater circulation monitoring well stratified sampling device according to claim 2 is characterized in that: The fixed end of the sampling water pipe (24) is arranged on the lower wall of the counterweight bottom plate (21), and the sampling water pipe (24) is connected to the lower end of the connecting sleeve (40).

4. The stratified sampling device for groundwater circulation monitoring wells according to claim 3 is characterized in that: A balanced one-way valve (48) is provided on the upper portion of the outer wall of the sampling cylinder (28) and the cleaning cylinder (29).

5. The groundwater circulation monitoring well stratified sampling device according to claim 4 is characterized in that: A drain valve (49) is provided at the lower portion of the outer wall of the sampling cylinder (28) and the cleaning cylinder (29).

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