Controllable underground water layered continuous sampling and online detection and storage device

Abstract

The utility model belongs to the technical field of underground water detection, in particular to a controllable underground water layered continuous sampling and on-line detection and storage device which comprises a monitoring well and a sampling box, the monitoring well comprises an outer well and an inner well sleeved inside the outer well, the inner well is of a cylinder-like structure formed by splicing double arc sheets with a gap, a water inlet hole is formed in the inner wall surface of the outer well, and a water outlet hole is formed in the inner wall surface of the sampling box. A well cover is arranged at the top of the monitoring well; a plurality of layering parts used for layering water are arranged in the monitoring well, each layering part comprises a disc-like support, an air bag, a comprehensive detection sensor and a water pump, the comprehensive detection sensor and the water pump are fixed to the outer surface of the disc-like support, and the water pump communicates with a water inlet pipe and a water outlet pipe; the storage device comprises a sampling box, the sampling precision is high, the hysteresis effect of actual underground water exchange between the underground water monitoring well and the field is considered, a cleaning function is adopted, pipeline cleaning is conducted before sampling, it is guaranteed that samples of all times cannot be mutually polluted, layered underground water partitions are arranged, and it is guaranteed that water samples of all aquifers are not mutually doped.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater detection technology, specifically relating to a controllable groundwater stratified continuous sampling and online detection and storage device. Background Technology

[0002] Groundwater is an important component of water resources, and changes in its depth have a significant impact on agricultural water conversion, water consumption, and the healthy development of ecological landscapes such as forests, wastelands, and lakes. With the strengthening of ecological environmental protection in my country, agricultural non-point source pollution has also received widespread attention. Excessive fertilizer input and unreasonable irrigation methods in agricultural production lead to the leaching of large amounts of nitrogen and phosphorus into groundwater, causing both fertilizer loss from farmland and groundwater pollution. Understanding the mechanisms and processes of groundwater pollution requires long-term monitoring of groundwater nitrogen and phosphorus content, pH value, and other parameters.

[0003] Currently, groundwater sampling mainly employs multi-layer mixing, high-flow-rate, and manual sampling methods, which are inefficient and often involve offline laboratory analysis, meaning the test results cannot accurately reflect the pollution status of each layer.

[0004] For example, in existing technologies:

[0005] (1) A groundwater level detection and automatic sampling and preservation device (application number: 202110498001.3), the device includes a monitoring well, an automatic water level monitoring system, a power supply system and an automatic water sample collection and preservation system; the monitoring well includes an outer well (1), an inner well (2), a well cover (3) and filter sand (4); the automatic water level monitoring system includes a well rope (5) and a self-recording water level gauge (6); the power supply system includes an inverter (17), a storage battery (18), a power supply controller (19) and a solar panel (20); the automatic water sample collection and preservation system includes a first water pump (8), a second water pump (7), a first water pump outlet pipe (9), a second water pump outlet pipe (10), an outlet pipe support (11), a small refrigerator (12), a stepper motor (13), a circular sample slot (14), a container bottle (15) and a programmable controller (16); the invention has a wide range of applications and can be used in most groundwater level and water quality monitoring;

[0006] (2) A groundwater sampling device capable of continuous sampling (application number 202221559014.3) includes a sampling tube, the bottom side of which is provided with a groove, and a sleeve communicating with the groove is provided inside the sampling tube. The sampling tube is also provided with a water inlet pipe and a cylinder. By setting up the water inlet pipe, the sleeve, the cylinder and the baffle, when the sampling tube is inserted into the hole, the baffle connected to the water inlet pipe is embedded in the groove to block the sleeve, effectively avoiding the phenomenon of mud and sand blocking the water inlet pipe during the insertion of the sampling tube. When it is inserted to a specified depth, the cylinder can drive the water inlet pipe to move into the sleeve and drive the baffle to move outward. At this time, the water in the hole can enter the water inlet pipe through the water inlet hole and finally be transported to the sampling bottle, thereby realizing the sampling operation of groundwater.

[0007] (3) A segmented groundwater exploration sampler and method thereof (application number: 202210780425.3), comprising a fixed frame, a base frame, a sampler, a sampling plate one, an extraction tube, a sampling plate two, and an extraction pump. The bottom of the fixed frame is fixedly connected to the base frame by screws. The side wall of the sampler is slidably connected to the sampling plate one. The side wall of the sampling plate one is fixedly connected to the extraction tube by screws. This segmented groundwater exploration sampler has a flap with a carrying combination plate on the fixed frame, which facilitates the segmented setting of multiple samplers. The multiple samplers can change the vertical position of the sampling plate one and the horizontal position of the sampling plate two by means of a sliding rail, which improves the compatibility of the extraction pump. At the same time, an extraction tube with a carrying hole is provided on the back of the sampling plate two, which facilitates the multi-position movement of the extraction pump. It can be flexibly adapted and adjusted according to the actual groundwater sampling position, effectively increasing the diversity of groundwater exploration and sampling and ensuring the accuracy of data detection.

[0008] The existing technology (1) has the problem that it cannot sample in layers and that the water sample has the problem of being mixed. The existing technology (2) has the problem that the water sample depends on the water intake port, cannot sample in layers, and has a small water intake. The existing technology (3) has the problem that it does not achieve continuous sampling. Utility Model Content

[0009] To address the problems mentioned in the background section, this invention provides a controllable, stratified, continuous groundwater sampling, online detection, and storage device. Considering the lag effect of groundwater monitoring wells and actual groundwater exchange in the field, a cleaning function is incorporated to clean the pipeline before sampling, ensuring that samples from different layers do not contaminate each other. Furthermore, a stratified groundwater isolation system is implemented to ensure that water samples from different aquifers do not mix.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a controllable groundwater stratified continuous sampling and online detection and storage device, including a monitoring well and a sampling box. The monitoring well includes an outer well and an inner well nested inside it. The inner well is a cylindrical structure with gaps between double arc plates. The inner wall of the outer well is provided with a water inlet hole. The top of the monitoring well is provided with a well cover.

[0011] The monitoring well is equipped with several stratification sections for separating the water layers. Each stratification section includes a disc-like support and an air bladder, as well as a comprehensive detection sensor and a water pump fixed on the outer surface of the disc-like support. The water pump is connected to an inlet pipe and an outlet pipe.

[0012] The storage device includes a sampling box, which includes a refrigerator and a refrigeration cover. Several sampling bottles are placed in the refrigerated space covered by the refrigeration cover. After the refrigeration cover is opened to expose the sampling bottles, the sample in the drain pipe is used to drain into the sampling bottles.

[0013] As a preferred embodiment of the controllable groundwater stratified continuous sampling and online detection and storage device of this utility model, the inner wall of the outer well is fixed with symmetrically arranged hollow slide rails, the slide rails cover several water inlet holes distributed along the axis of the outer well, one end of the slide rails is provided with several through holes corresponding to the water inlet holes, and the several water inlet holes covered by the slide rails are provided with inward folds.

[0014] As a preferred embodiment of the controllable groundwater stratified continuous sampling and online detection and storage device of this utility model, the disc-like support and the airbag are provided with arc-shaped holes for the inner well to pass through. Except for the disc-like support and airbag closest to the bottom of the well, all of them are provided with corresponding through holes. The through holes corresponding to the positions of the disc-like support and the airbag are a group. From the bottom of the well to the wellhead, the number of through hole groups in each stratum increases by one in sequence. The through holes are used for the passage of pipelines.

[0015] As a preferred embodiment of the controllable groundwater stratified continuous sampling and online detection and storage device of this utility model, the airbag is connected to an air pipe, one end of the water inlet pipe is connected to a flushing pipe, and normally closed solenoid valves are fixedly installed at the end of the water inlet pipe and the end of the flushing pipe. The air pipes, flushing pipes, drainage pipes, as well as the wires of the water pump, normally closed solenoid valves, and integrated detection sensors installed on several stratification sections all extend through the well cover to the ground surface.

[0016] As a preferred embodiment of the controllable groundwater stratified continuous sampling, online detection and storage device of this utility model, each group of through holes is fixedly installed with waterproof foam for pipelines to pass through.

[0017] As a preferred embodiment of the controllable groundwater stratified continuous sampling, online detection and storage device of this utility model, the metal bracket is made of iron or stainless steel, and several positioning magnets are fixedly connected to the inner side of the slide rail at the position where no through hole is opened.

[0018] As a preferred embodiment of the controllable groundwater stratification continuous sampling and online detection and preservation device of this utility model, an electric telescopic rod is fixedly connected between the refrigerator and the refrigeration cover, and a pipe support is fixedly connected to the outside of the refrigeration cover and the top surface of the refrigerator. Several drain pipes are fixedly connected to one end of the pipe support, and the drain outlet of the drain pipe points to the inlet of the sampling bottle.

[0019] As a preferred embodiment of the controllable groundwater stratification continuous sampling, online detection and preservation device of this utility model, the outer end face of the sampling bottle is provided with a strip-shaped opening, and the inner wall of the sampling bottle is fixedly connected with a baffle for guiding flow and preventing splashing.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This device has a wide range of applications and can be used in most groundwater level and water quality monitoring.

[0022] 2. This device combines automatic monitoring of groundwater level and quality with automatic stratified sampling and preservation of water samples, enabling comprehensive monitoring of multiple groundwater elements such as groundwater level, salinity, pH value, nitrogen, and phosphorus content. It overcomes the limitations of traditional groundwater quality monitoring technologies, which can only monitor single-layer, multi-layer mixed sampling, or a single or a few items.

[0023] 3. This device has a high degree of automation, which can free up manpower. It adopts a programmable controller and can set the sampling interval time according to the needs.

[0024] 4. This device has high sampling accuracy. Considering the lag effect of groundwater monitoring wells and actual groundwater exchange in the field, a cleaning function is set up to clean the pipeline before sampling to ensure that samples from each batch will not be contaminated. In addition, a layered groundwater isolation is set up to ensure that water samples from different aquifers do not mix with each other.

[0025] 5. This device emphasizes sample preservation by incorporating refrigeration equipment to achieve long-term sample preservation. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0028] Figure 2 This is a cross-sectional view of the monitoring well in this utility model;

[0029] Figure 3 In this utility model Figure 2 An enlarged structural diagram at point A;

[0030] Figure 4 This is a top view of the overall structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the layered structure in this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of a single layered part in this utility model;

[0033] Figure 7 In this utility model Figure 6 A magnified structural diagram at point B;

[0034] Figure 8 This is a schematic diagram of the airbag installation structure in this utility model;

[0035] Figure 9 This is a schematic diagram of the overall structure of the sampling box in this utility model;

[0036] Figure 10 This is a schematic diagram of the structure of the baffle in this utility model;

[0037] In the picture:

[0038] 1. Monitoring well; 2. Layered section; 3. Sampling box;

[0039] 101. Outer well; 102. Inner well; 103. Water inlet; 104. Inner bend; 105. Slide rail;

[0040] 201. Disc-like support; 202. Airbag; 203. Through hole; 204. Arc-shaped hole; 205. Waterproof foam; 206. Metal support; 207. Water pump; 208. Water inlet pipe; 209. Normally closed solenoid valve; 2010. Flushing pipe; 2011. Drain pipe; 2012. Air pipe; 2013. Integrated detection sensor;

[0041] 301. Refrigerator; 302. Refrigeration cover; 303. Electric telescopic rod; 304. Sampling bottle; 3041. Strip opening; 3042. Baffle; 305. Pipe support. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] like Figures 1-10 As shown:

[0044] A controllable groundwater stratified continuous sampling and online detection and storage device includes a monitoring well 1 and a sampling box 3. The monitoring well 1 includes an outer well 101 and an inner well 102 nested inside it. The inner well 102 is a cylindrical structure with gaps between double arc plates. The inner wall of the outer well 101 is provided with a water inlet hole 103. The top of the monitoring well 1 is provided with a well cover.

[0045] The monitoring well 1 is equipped with several layering sections 2 for separating the water layer. The layering section 2 includes a disc-like support 201 and an airbag 202, as well as a comprehensive detection sensor 2013 and a water pump 207 fixed on the outer surface of the disc-like support 201. The water pump 207 is connected to an inlet pipe 208 and an outlet pipe 2011.

[0046] The storage device includes a sampling box 3, which includes a refrigerator 301 and a refrigeration cover 302. Several sampling bottles 304 are placed in the refrigerated space covered by the refrigeration cover 302. After the refrigeration cover 302 is opened to expose the sampling bottles 304, the sample in the drain pipe 2011 is drained into the sampling bottles 304. The sampling bottles 304 are placed in the refrigerator 301 throughout the process. The refrigerator 301 is set at a temperature of 4°C to avoid the problem of groundwater deterioration after extraction.

[0047] Furthermore, after the monitoring well 1 is installed, the wellhead of the monitoring well 1 is exposed on the ground surface. Several layered parts 2 are placed into the target position in sequence. By inflating the airbag 202, the airbag 202 expands, which not only achieves fixation but also has good sealing performance, ensuring that the water samples from each aquifer do not mix with each other. The well wall of the outer well 101 is provided with multiple water inlet holes 103 that allow free exchange of groundwater, and filter sand is set on the outside of the outer well 101. The bottom ends of the outer well 101 and the inner well 102 are completely sealed.

[0048] In an optional embodiment, a symmetrically arranged hollow slide rail 105 is fixed on the inner wall of the outer well 101. The slide rail 105 covers a number of water inlet holes 103 distributed along the axis of the outer well 101. A number of through holes corresponding to the water inlet holes 103 are opened at one end of the slide rail 105. An inner fold 104 is provided at the number of water inlet holes 103 covered by the slide rail 105.

[0049] In this embodiment, the water inlet 103 allows groundwater to freely enter the well and also serves to reinforce the well wall. The inner fold 104 further strengthens the well wall's fixation. During processing, the inner fold 104 is formed by cutting a star-shaped cut at the location and then applying pressure to the star-shaped cut with a tapered rod. The remaining water inlets 103 can be obtained directly by drilling. The inner fold 104 can be covered by a slide rail 105, which facilitates the movement of the layered section 2 within the well.

[0050] In an optional embodiment, the disc-like support 201 and the airbag 202 are provided with arc-shaped holes 204 for the inner well 102 to pass through. Except for the disc-like support 201 and the airbag 202 closest to the bottom of the well, each of them is provided with a corresponding through hole 203. The through holes 203 corresponding to the positions of the disc-like support 201 and the airbag 202 are a group. From the bottom of the well to the wellhead, the number of through holes 203 groups in each layer 2 increases by one in sequence. The through holes 203 are used for the passage of pipelines.

[0051] In this embodiment, each layer 2 has a set of pipelines. The pipelines need to pass through the upper layer 2. Therefore, through holes 203 are opened on the layer 2. As the number of layer 2 increases, the number of through holes 203 also increases. Through the inner well 102 and slide rail 105, the layer 2 can be moved and fixed stably.

[0052] The layered sections 2 can be placed into the well in sequence. The movement of the layered sections 2 can be pushed by a rigid rod to move the layered sections 2 in the well. In addition, after the layered sections 2 are placed in the well and combined with the slide rail 105 on the outer well wall 101, the transmission structure driven by the motor can be used to move it to the designated position. Then the limiter on the layered section 2 will automatically lock and fix it. Then the air pump will work to fill the gap between the edge of the layered section 2 and the outer well 101 and the inner well 102 with air through the air bag 202 to play a water-proof role (including the through hole 203 in the layered section 2). The other layered sections 2 can repeat the above steps to complete the layering work of the sampling and testing well.

[0053] The motor-driven transmission structure adopts existing technology: a common electric drive system consists of a motor, a reducer, and a transmission chain, gear set, or rubber wheel. The motor can be an AC motor. The controller receives external commands and outputs corresponding power according to a preset program. The reducer is connected to the motor, reducing the output speed and increasing the torque to adapt to the driving torque required to cooperate with the slide rail 105. The transmission chain or gear set transmits power to components such as sliders or rollers connected to the layered part 2, enabling them to move smoothly along the slide rail 105 and accurately reach the designated position. This electric drive technology is widely used in the linear motion control of many automated equipment, such as the drive unit of the Borhain small waterproof track inspection robot, model: BH-TRD-100; or the UCT-FDM-080 micro waterproof friction drive module; or the AKR-STD-120 small friction drive device for underwater monitoring.

[0054] The limit switch utilizes existing technology: it can be a mechanical limit switch. When the layer 2 reaches the preset position, the mechanical limit switch triggers the internal contacts to change the circuit's on / off state through physical contact, thereby sending a signal to the control system to stop the drive and lock the action. For example, Omron's D4V series limit switch is a commonly used mechanical limit switch, offering various operating modes and installation options to meet different application needs. Schneider's XCK series limit switches also have high reliability and durability, high protection levels, and are suitable for harsh working environments.

[0055] In an optional embodiment, the airbag 202 is connected to an air pipe 2012, one end of the water inlet pipe 208 is connected to a flushing pipe 2010, and a normally closed solenoid valve 209 is fixedly installed at the end of the water inlet pipe 208 and the end of the flushing pipe 2010. The wires of the air pipe 2012, flushing pipe 2010, drain pipe 2011, water pump 207, normally closed solenoid valve 209, and integrated detection sensor 2013 provided on several layered sections 2 all extend through the manhole cover to above ground.

[0056] In this embodiment, the pipeline is cleaned before sampling to ensure that samples from different layers do not contaminate each other. Furthermore, the groundwater barrier formed by the stratified section 2 ensures that water samples from different aquifers do not mix. The top of the flushing pipe 2010 can be directly connected to a cleaning bottle or a clean water source. Figure 6 and Figure 7 As shown, when the pipeline needs to be cleaned, the normally closed solenoid valve 209 connected to the inlet pipe 208 is de-energized, and the normally closed solenoid valve 209 connected to the flushing pipe 2010 is energized to open the passage, starting the water pump 207. After the water pump 207 starts working, it will deliver clean water to the water pump 207 through the flushing pipe 2010, and then discharge it through the drain pipe 2011 to achieve pipeline cleaning. After cleaning, the normally closed solenoid valve 209 connected to the flushing pipe 2010 is de-energized, and the normally closed solenoid valve 209 connected to the inlet pipe 208 is energized to open the passage, starting the water pump 207. The water pump 207 will draw water from the aquifer from the inlet pipe 208 into the water pump 207, and then discharge it from the drain pipe 2011. The discharged water is collected and stored through the sampling bottle 304.

[0057] In an optional embodiment, a waterproof foam 205 for the pipeline to pass through is fixedly installed on the inside of each set of through holes 203.

[0058] In this embodiment, since the conduits are all cylindrical and there are a large number of them, traditional sealing methods are not effective. By passing the conduits through the waterproof foam 205, after the airbag 202 is inflated, the inflated airbag 202 will compress the waterproof foam 205, thereby improving the sealing between the waterproof foam 205 and the conduit.

[0059] In an optional embodiment, the metal bracket 206 is made of iron or stainless steel, and several positioning magnets are fixedly connected to the inner side of the slide rail 105 at the location where no through hole is opened.

[0060] In this embodiment, when the layered part 2 is not moved electrically, for example, when the layered part 2 is moved by a rigid rod, in order to avoid the layered part 2 from stopping at the water inlet hole 103 and to achieve initial fixation after the layered part 2 has moved, the magnetic force of the positioning magnet can solve this problem. When the layered part 2 is moved, if the layered part 2 is felt to be attracted to the positioning magnet, it means that the layered part 2 is not covering the position of the water inlet hole 103. If the position attracted by the magnetic force of the magnet is not the target position, the layered part 2 is continued to be pushed until the layered part 2 reaches the vicinity of the target position and is initially fixed by the magnetic force of the positioning magnet. The subsequent fixation is achieved by the expansion of the airbag 202.

[0061] In an optional embodiment, an electric telescopic rod 303 is fixedly connected between the refrigerator 301 and the refrigeration cover 302. A pipe support 305 is fixedly connected to the outside of the refrigeration cover 302 and the top surface of the refrigerator 301. A plurality of drain pipes 2011 are fixedly connected to one end of the pipe support 305, and the drain outlet of the drain pipe 2011 points to the inlet of the sampling bottle 304.

[0062] In this embodiment, the water just discharged from the drain pipe 2011 does not need to be collected. After a portion of the water is discharged through the drain pipe 2011, the water sample can be collected. For the water that does not need to be collected, it is achieved by not opening the refrigerator cover 302. At this time, the water will impact the inclined surface of the refrigerator cover 302 and flow up and down. Then, by energizing the electric telescopic rod 303, the electric telescopic rod 303 drives the refrigerator cover 302 to move upward to expose the sampling bottle 304. At this time, the water discharged from the drain pipe 2011 can pass through the inlet of the sampling bottle 304 and impact the sampling bottle 304.

[0063] In an optional embodiment, the outer end face of the sampling bottle 304 is provided with a strip-shaped opening 3041, and the inner wall surface of the sampling bottle 304 is fixedly connected with a baffle 3042 for guiding flow and preventing splashing.

[0064] In this embodiment, the inlet of the sampling bottle 304 is a strip-shaped opening 3041. When the water pressure is different, the strip-shaped opening 3041 can still collect water samples well. The baffle 3042 can prevent water from splashing out after it impacts the baffle 3042, and can also make the water flow down the slope of the baffle 3042.

[0065] This utility model also includes an online detection device, including a wireless transceiver module, a comprehensive data collection module, and a processing detection module. The comprehensive data collection module and the processing detection module are placed on the ground. The comprehensive detection sensor 2013 is used for data acquisition. The comprehensive data collection module and the processing detection module are connected to the comprehensive detection sensor 2013 via a data cable to process the data. The processed data is then sent to the device management terminal for analysis via the wireless module.

[0066] The integrated detection sensor 2013 includes a pH detection module, a nitrogen detection module, a phosphorus detection module, a salinity detection module, a water temperature detection module, and a water level detection module.

[0067] The power supply system includes two sets of batteries (main and auxiliary), solar panels, controllers, and inverters. One set of batteries is the main power supply set, and the other is the backup emergency power supply set. Both sets of batteries are connected to the solar panels. A power supply controller is set in the middle to protect the batteries from overcharging. The DC power from the batteries is converted into AC power by the inverter and then delivered to the electrical equipment in the system. When the main power supply set has a problem or insufficient power, it will automatically switch to the backup power supply set, and the integrated information processing platform will issue a warning message to the terminal.

[0068] Gas is introduced into the airbag 202 by an air pump. The air pump system consists of an air pump, an airbag 202, and an electrically controlled check valve. The air pump system can consist of multiple air pumps (or a single air pump). The air pump is equipped with a pressure sensor to detect the pressure of the airbag 202. The electrically controlled check valve is used to deflate the airbag 202 after use.

[0069] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A controllable groundwater stratified continuous sampling and online detection and storage device, comprising a monitoring well (1) and a sampling box (3), characterized in that: The monitoring well (1) includes an outer well (101) and an inner well (102) fitted inside it. The inner well (102) is a cylindrical structure with gaps between two arc plates. The inner wall of the outer well (101) is provided with a water inlet hole (103). The top of the monitoring well (1) is provided with a well cover. The monitoring well (1) is equipped with several stratification sections (2) for separating water layers. Each stratification section (2) includes a disc-like support (201) and an airbag (202), as well as a comprehensive detection sensor (2013) and a water pump (207) fixed on the outer surface of the disc-like support (201). The water pump (207) is connected to an inlet pipe (208) and an outlet pipe (2011). The storage device includes a sampling box (3), which includes a refrigerator (301) and a refrigeration cover (302). Several sampling bottles (304) are placed in the refrigerated space covered by the refrigeration cover (302). After the refrigeration cover (302) is opened to expose the sampling bottles (304), the sample in the drain pipe (2011) is drained into the sampling bottles (304).

2. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 1, characterized in that: The inner wall of the outer well (101) is fixed with symmetrically arranged hollow slide rails (105). The slide rails (105) cover a number of water inlet holes (103) distributed along the axis of the outer well (101). One end of the slide rails (105) is provided with a number of through holes corresponding to the water inlet holes (103). The water inlet holes (103) covered by the slide rails (105) are provided with inward folds (104).

3. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 1, characterized in that: The disc-shaped support (201) and the airbag (202) are provided with arc-shaped holes (204) for the inner well (102) to pass through. Except for the disc-shaped support (201) and the airbag (202) closest to the bottom of the well, each is provided with a corresponding through hole (203). The through holes (203) corresponding to the positions of the disc-shaped support (201) and the airbag (202) are a group. From the bottom of the well to the wellhead, the number of through holes (203) in each layer (2) increases by one in sequence. The through holes (203) are used for the passage of pipelines.

4. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 1, characterized in that: The airbag (202) is connected to an air pipe (2012), and one end of the water inlet pipe (208) is connected to a flushing pipe (2010). A normally closed solenoid valve (209) is fixedly installed at the end of the water inlet pipe (208) and one end of the flushing pipe (2010). The wires of the air pipe (2012), flushing pipe (2010), drain pipe (2011), water pump (207), normally closed solenoid valve (209), and integrated detection sensor (2013) installed on several layered sections (2) all extend through the manhole cover to the ground.

5. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 3, characterized in that: Each set of through holes (203) has a waterproof foam (205) fixedly installed on the inside for the pipeline to pass through.

6. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 1, characterized in that: The metal bracket (206) is made of iron or stainless steel, and several positioning magnets are fixedly connected to the inner side of the slide rail (105) at the non-through hole position.

7. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 1, characterized in that: An electric telescopic rod (303) is fixedly connected between the refrigerator (301) and the refrigerator cover (302). A pipe bracket (305) is fixedly connected to the outside of the refrigerator cover (302) and the top surface of the refrigerator (301). Several drain pipes (2011) are fixedly connected to one end of the pipe bracket (305). The drain outlet of the drain pipe (2011) points to the inlet of the sampling bottle (304).

8. The controllable groundwater stratified continuous sampling and online detection and storage device according to claim 1 or 7, characterized in that: The outer end face of the sampling bottle (304) is provided with a strip-shaped opening (3041), and the inner wall of the sampling bottle (304) is fixedly connected with a baffle (3042) for guiding flow and preventing splashing.

Images