Continuous monitoring equipment for underground water sample

Abstract

The invention relates to the technical field of underground water monitoring, in particular to continuous underground water sample monitoring equipment which comprises a water inlet pipe, the first end of the water inlet pipe is communicated with underground water, the second end of the water inlet pipe is in one-way communication with a gas-water separation container, and an exhaust port in one-way communication with the external environment is formed in the gas-water separation container. The gas-water separation container is communicated with the water pumping assembly, the water pumping assembly is communicated with the water sample temporary storage container, the water sample temporary storage container is communicated with the overflow container, and a water quality detection sensor is arranged on the water sample temporary storage container. In the using process, firstly, the three containers are filled with water, then underground water is pumped into the gas-water separation container through the water pumping assembly, and due to the fact that the water inlet pressure of the gas-water separation container is smaller than the water outlet pressure of the gas-water separation container, bubbles in the underground water can be separated out under the effect of negative pressure; as the water inlet pressure of the water sample temporary storage container is greater than the water outlet pressure, bubbles in the underground water can be dissolved under the action of positive pressure, so that the accuracy and reliability of monitoring data can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater monitoring, and in particular to a continuous monitoring device for groundwater samples. Background Art

[0002] Groundwater refers to water stored in the gaps in rocks below the surface. It is an important component of water resources and plays a key role in water supply, ecological balance, geological effects, etc.

[0003] With the large-scale development and utilization of groundwater, water quality safety issues are becoming increasingly prominent. To ensure the safe and sustainable use of groundwater, continuous dynamic monitoring has become essential. This continuous monitoring requires a monitoring device. Related technologies, such as Chinese patent application CN115112848A, disclose an intelligent monitoring device for drinking groundwater contamination. The device includes a pumping mechanism for extracting groundwater and a monitoring device. The pumping mechanism extracts groundwater, and the monitoring device includes a multi-parameter groundwater quality sensor for monitoring the quality of the groundwater extracted by the pumping mechanism.

[0004] However, existing monitoring devices also have some problems during actual use: water quality detection sensors usually use electrochemical methods, optical methods and other principles to measure water quality parameters of groundwater samples. These detection principles have high requirements on the stability of the detection environment; when there are many bubbles in the groundwater sample, the bubbles will cause multiple interferences to the detection results: First, during the optical detection process, bubbles will scatter or refract light, causing the optical path to change, thereby affecting the collection of optical signals such as absorbance and fluorescence intensity, and causing the detection data to deviate from the true value; second, for electrochemical water quality detection sensors, bubbles attached to the electrode surface will hinder ion diffusion, change the contact area and mass transfer efficiency between the electrode and the groundwater sample, and cause fluctuations in electrochemical signals such as potential and current; third, the presence of bubbles may also cause uneven local composition of the groundwater sample, making the parameters detected by the water quality detection sensor unable to represent the actual groundwater quality; thereby seriously reducing the accuracy and reliability of the monitoring data, and thus affecting the scientific assessment and effective management of groundwater quality. Summary of the Invention

[0005] Based on this, it is necessary to provide a continuous monitoring device for groundwater samples to address the problem of large monitoring data errors in the current groundwater monitoring process.

[0006] The above purpose is achieved through the following technical solutions: A continuous monitoring device for groundwater samples, comprising: a water inlet pipe, wherein a first end of the water inlet pipe is in communication with groundwater; An air-water separation container, the air-water separation container is in communication with the second end of the water inlet pipe; an exhaust port is provided on the air-water separation container, the exhaust port is in one-way communication with the external environment, and the communication direction is from the air-water separation container to the external environment; the first end and the second end of the water inlet pipe are in one-way communication, and the communication direction is from the first end to the second end of the water inlet pipe; a water pumping assembly, connected to the air-water separation container and configured to pump the groundwater; the water inlet pressure of the air-water separation container is lower than the water outlet pressure; a water sample temporary storage container, connected to the pumping assembly and configured to temporarily store the groundwater; a water quality detection sensor, disposed on the water sample temporary storage container and configured to detect the water quality of the groundwater in the water sample temporary storage container; The overflow container is connected to the water sample temporary storage container and is configured to receive groundwater in the water sample temporary storage container and discharge it to the external environment; the water inlet pressure of the water sample temporary storage container is greater than the water outlet pressure.

[0007] Furthermore, a water flow regulating valve is provided at the connection point between the overflow container and the water sample temporary storage container, and the water flow regulating valve is configured to make the flow rate of groundwater located in the water sample temporary storage container when flowing to the overflow container smaller than the flow rate of groundwater located in the overflow container when flowing to the water sample temporary storage container; the pumping assembly is also configured to pump the groundwater located in the overflow container into the water sample temporary storage container; the third end of the water inlet pipe is unidirectionally connected to the overflow container, and the connection direction is from the third end of the water inlet pipe to the overflow container.

[0008] Furthermore, a nozzle is inserted into the water sample temporary storage container, the nozzle opening of the nozzle faces the water quality detection sensor, and the nozzle is arranged at the connection point between the water sample temporary storage container and the overflow container.

[0009] Furthermore, the water flow regulating valve includes a first valve body, which has two first ports that are interconnected, one of which is connected to the water sample temporary storage container, and the other of which is connected to the overflow container; a first valve core is inserted in the first valve body, and the first valve core is connected to the first valve body through a first elastic member, and under the action of the first elastic member, the first valve core has a tendency to move toward the direction of the first port that is connected to the overflow container; a through hole is provided on the first valve core, and the through hole is connected to the two first ports at the same time.

[0010] Furthermore, the first elastic member is a first compression spring.

[0011] Furthermore, a filter element is provided at the connection point between the second end of the water inlet pipe and the air-water separation container, and the filter element is configured to filter the groundwater.

[0012] Furthermore, the filter element is a filter plate, a plurality of filter holes are provided on the plate surface of the filter plate, and the plate surface of the filter plate and the axis of the second end of the water inlet pipe are perpendicularly arranged.

[0013] Furthermore, the position where the air-water separation container is connected to the water inlet pipe is located above the position where the air-water separation container is connected to the water pumping component.

[0014] Furthermore, a partition plate is provided in the gas-water separation container, and the partition plate is configured to block the direct flow of the groundwater to the pumping assembly.

[0015] Furthermore, the water pumping component includes a peristaltic pump.

[0016] The beneficial effects of the present invention are: The continuous monitoring device for groundwater samples provided by the present invention is first used to fill the air-water separation container and the water sample temporary storage container with water, and then the groundwater is sucked into the air-water separation container through the water inlet pipe by the pumping component. Since the water inlet pressure of the air-water separation container is less than the water outlet pressure, the water level in the air-water separation container gradually decreases and a cavity appears. At this time, the interior of the air-water separation container is in a negative pressure state, and the bubbles in the groundwater in the air-water separation container can be precipitated under the action of the pressure difference, and the groundwater in the air-water separation container can then enter the air-water separation container in a state with fewer bubbles. into the water sample temporary storage container; since the water inlet pressure of the water sample temporary storage container is greater than the water outlet pressure, the interior of the water sample temporary storage container is in a positive pressure state. Under the positive pressure state, the solubility of air in water increases, thereby enabling the bubbles in the groundwater in the water sample temporary storage container to dissolve, thereby further reducing the bubbles in the groundwater in the water sample temporary storage container. When the water quality detection sensor monitors the water quality of the groundwater in the water sample temporary storage container, fewer bubbles can reduce the impact on the monitoring results, thereby improving the accuracy and reliability of the monitoring data.

[0017] Furthermore, by setting up a pumping assembly, it is also configured to be able to suck the groundwater located in the overflow container into the water sample temporary storage container. During use, the surface of the water quality detection sensor can be cleaned, thereby improving the detection accuracy of the water quality detection sensor; by setting the third end of the water inlet pipe and the overflow container to be unidirectionally connected, and the connection direction is from the third end of the water inlet pipe to the overflow container, during use, the groundwater that has cleaned the water quality detection sensor can then enter the overflow container, avoiding being retained in the gas-water separation container and the water sample temporary storage container, which affects the next groundwater monitoring result; by setting up a water flow regulating valve, during use, the flow rate of the groundwater located in the water sample temporary storage container when flowing to the overflow container is less than the flow rate of the groundwater located in the overflow container when flowing to the water sample temporary storage container, thereby ensuring that the water inlet pressure of the water sample temporary storage container is greater than the water outlet pressure, and the groundwater located in the overflow container can be ensured to have a larger flow rate when flowing to the water sample temporary storage container, thereby ensuring the cleaning effect of the water quality detection sensor surface.

[0018] Furthermore, by setting a nozzle, when the groundwater in the overflow container flows into the water sample storage container, the flow rate of the groundwater can be increased under the action of the nozzle, thereby further improving the cleaning effect of the surface of the water quality detection sensor.

[0019] Furthermore, by arranging a filter element, in the process of the pumping component sucking the groundwater into the air-water separation container through the water inlet pipe, the groundwater can be filtered before the groundwater enters the air-water separation container, thereby reducing the impurities contained in the groundwater entering the air-water separation container, and further reducing the impurities adhering to the surface of the water quality detection sensor, which is conducive to improving the detection accuracy of the water quality detection sensor; at the same time, when the filter element is seriously clogged, the water inlet pressure of the air-water separation container will be further reduced, thereby further improving the negative pressure state of the air-water separation container, and further improving the precipitation effect of bubbles in the groundwater in the air-water separation container, so that the groundwater in the air-water separation container can then enter the water sample temporary storage container in a state with fewer bubbles. In the device, when the water quality detection sensor monitors the water quality of the groundwater located in the water sample temporary storage container, fewer bubbles can further reduce the impact on the monitoring results, thereby further improving the accuracy and reliability of the monitoring data; in addition, when the groundwater quality is worse, more impurities will pass through the filter element, and more impurities will adhere to the water quality detection sensor. At this time, the negative pressure state of the gas-water separation container will be greater, thereby improving the cleaning effect of the water quality detection sensor during this detection process and achieving automatic adjustment; in the process of the pumping component sucking the groundwater located in the overflow container into the water sample temporary storage container, the groundwater can backwash the filter element, thereby ensuring the filtering effect of the filter element and avoiding affecting the next use.

[0020] Furthermore, by setting the position where the air-water separation container and the water inlet pipe are connected above the position where the air-water separation container and the pumping component are connected, during use, the groundwater moves from top to bottom and the bubbles move from bottom to top, thereby improving the separation effect between the bubbles and groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a continuous monitoring device for groundwater samples provided by an embodiment of the present invention; Figure 2 A schematic front view of the structure of a continuous monitoring device for groundwater samples provided by an embodiment of the present invention; Figure 3 A schematic diagram of the top view of the structure of the continuous monitoring device for groundwater samples provided by an embodiment of the present invention; Figure 4 for Figure 3 Middle AA section view; Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 6 for Figure 4 A schematic diagram of the partially enlarged structure at point C in the middle; Figure 7 for Figure 4 Schematic diagram of the locally enlarged structure at point D in the middle.

[0022] in: 1. Water inlet pipe; 2. Gas-water separation container; 201. Exhaust port; 301, peristaltic pump; 4. Temporary water sample storage container; 401. Connecting pipe; 5. Water quality detection sensor; 6. Overflow container; 601. Overflow pipe; 7. Water flow regulating valve; 701. First valve body; 7011. First opening; 702. First valve core; 7021. Through hole; 703. First compression spring; 8. Nozzle; 9. Filter plate; 10. Separator; 11. One-way valve; 1101. Second valve body; 1202. Second valve core; 1203. Second compression spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] like Figures 1 to 7 As shown, the continuous monitoring device for groundwater samples provided by one embodiment of the present invention is used to monitor groundwater, and is configured to include a water inlet pipe 1, an air-water separation container 2, a water pumping component, a water sample temporary storage container 4, a water quality detection sensor 5 and an overflow container 6, wherein the first end of the water inlet pipe 1 is connected to the groundwater; the air-water separation container 2 is connected to the second end of the water inlet pipe 1; an exhaust port 201 is provided on the air-water separation container 2, and the exhaust port 201 is unidirectionally connected to the external environment, and the connection direction is from the air-water separation container 2 to the external environment; the first end and the second end of the water inlet pipe 1 are unidirectionally connected, and the connection direction is from the water inlet pipe 1 from the first end to the second end; the pumping component is connected to the air-water separation container 2 and is configured to pump groundwater; the water inlet pressure of the air-water separation container 2 is less than the water outlet pressure; the water sample storage container 4 is connected to the pumping component and is configured to temporarily store groundwater; the water quality detection sensor 5 is provided on the water sample storage container 4 and is configured to perform water quality detection on the groundwater located in the water sample storage container 4; the overflow container 6 is connected to the water sample storage container 4 and is configured to receive the groundwater located in the water sample storage container 4 and discharge it to the external environment; the water inlet pressure of the water sample storage container 4 is greater than the water outlet pressure.

[0027] Specifically in this embodiment, the overflow container 6 is a box-shaped structure having long and short sides. When installed, the long sides extend in the front-to-back direction, and the short sides extend in the left-to-right direction. To facilitate the discharge of water from the overflow container 6, an overflow pipe 601 is vertically and penetratingly provided on the rear side wall of the overflow container 6. The temporary water sample storage container 4 is a cylindrical structure and is vertically installed and located above the overflow container 6 when installed. To facilitate communication between the temporary water sample storage container 4 and the overflow container 6, a connecting pipe 401 is provided at the bottom of the temporary water sample storage container 4. When installed, the top end of the connecting pipe 401 is connected to the temporary water sample storage container 4, and the bottom end is vertically installed and penetrates the upper end surface of the overflow container 6 and extends into the interior of the overflow container 6 to ensure communication with the overflow container 6. The air-water separation container 2 is a cylindrical structure and is vertically installed and located above the overflow container 6 when installed. The air-water separation container 2 is also located in front of the temporary water sample storage container 4. The water inlet pipe 1 is located in front of the air-water separation container 2 during installation. The pumping assembly can be configured to include a peristaltic pump 301 , which is located above the overflow container 6 and between the water sample temporary storage container 4 and the air-water separation container 2 .

[0028] The exhaust port 201 is provided at the top of the gas-water separation container 2; to facilitate one-way communication between the exhaust port 201 and the external environment, a one-way valve 11 is inserted into the exhaust port 201. Optionally, the one-way valve 11 is configured to include a second valve body 1101, which is inserted into the exhaust port 201 during installation. The second valve body 1101 has two second openings, which are arranged in an up-and-down direction, with the upper second opening communicating with the external environment and the lower second opening communicating with the gas-water separation container 2. A second valve core 1202 is inserted into the second valve body 1101, which is connected to the second valve body 1101 via a second elastic member. Under the action of the second elastic member, the second valve core 1202 has a tendency to block the lower second opening.

[0029] Optionally, the second valve core 1202 can be configured as a spherical structure.

[0030] Optionally, the second elastic member is a second compression spring 1203 , which is vertically arranged and located above the second valve core 1202 . The second compression spring 1203 is connected between the second valve body 1101 and the second valve core 1202 .

[0031] It is understandable that the one-way valve 11 can also be set to a lift type, a swing type, etc.

[0032] In order to facilitate one-way communication between the first and second ends of the water inlet pipe 1, a one-way valve 11 is inserted into the first end of the water inlet pipe 1. The setting of the one-way valve 11 also makes the water inlet pressure of the gas-water separation container 2 lower than the water outlet pressure.

[0033] Optionally, the one-way valve 11 is configured to include a second valve body 1101, which is inserted into the first end of the water inlet pipe 1 during installation. The second valve body 1101 has two second ports, which are arranged in the up and down directions, wherein the upper second port is connected to the external environment, and the lower second port is connected to the second end of the water inlet pipe 1; a second valve core 1202 is inserted in the second valve body 1101, and the second valve core 1202 is connected to the second valve body 1101 through a second elastic member. Under the action of the second elastic member, the second valve core 1202 has a tendency to seal on the second port located below.

[0034] Optionally, the second valve core 1202 can be configured as a spherical structure.

[0035] Optionally, the second elastic member is a second compression spring 1203 , which is vertically arranged and located above the second valve core 1202 . The second compression spring 1203 is connected between the second valve body 1101 and the second valve core 1202 .

[0036] It is understandable that the one-way valve 11 can also be set to a lift type, a swing type, etc.

[0037] In order to facilitate the realization that the water inlet pressure of the water sample temporary storage container 4 is greater than the water outlet pressure, a one-way valve 11 is provided in the connecting pipe 401 .

[0038] Optionally, the one-way valve 11 is configured to include a second valve body 1101, which is inserted into the connecting pipe 401 during installation. The second valve body 1101 has two second ports, which are arranged in the up and down directions, wherein the upper second port is connected to the water sample temporary storage container 4, and the lower second port is connected to the overflow container 6; a second valve core 1202 is inserted in the second valve body 1101, and the second valve core 1202 is connected to the second valve body 1101 through a second elastic member. Under the action of the second elastic member, the second valve core 1202 has a tendency to seal on the second port located below.

[0039] Optionally, the second valve core 1202 can be configured as a spherical structure.

[0040] Optionally, the second elastic member is a second compression spring 1203 , which is vertically arranged and located above the second valve core 1202 . The second compression spring 1203 is connected between the second valve body 1101 and the second valve core 1202 .

[0041] It is understandable that the one-way valve 11 can also be set to a lift type, a swing type, etc.

[0042] During use, the air-water separation container 2 and the water sample storage container 4 are first filled with water through a pretreatment procedure. This step is intended to expel the initial air inside each container and create a stable fluid environment for subsequent air-water separation and water sample detection.

[0043] Specifically, water can be input into the air-water separation container 2 and the water sample temporary storage container 4 through an external water pumping device.

[0044] More specifically, the external water pumping device can be configured to include a first water pump, the water pumping end of the first water pump is connected to the external water body, and the water pumping end is connected to the air-water separation container 2 or the water sample temporary storage container 4 through a solenoid valve.

[0045] Then start the peristaltic pump 301 in the forward direction, the peristaltic pump 301 sucks the groundwater into the air-water separation container 2 through the water inlet pipe 1, then sucks the groundwater from the air-water separation container 2 into the water sample storage container 4, and then transports the groundwater from the water sample storage container 4 to the overflow container 6 through the connecting pipe 401; as the peristaltic pump 301 runs, when the liquid level in the overflow container 6 reaches the height of the overflow pipe 601, the groundwater is discharged from the overflow container 6 through the overflow pipe 601 into the external environment.

[0046] During groundwater transportation, a one-way valve 11 is installed between the first and second ends of the inlet pipe 1. This one-way valve 11 ensures that the inlet pressure of the gas-water separation container 2 is lower than the outlet pressure. This flow rate differential causes the water level within the gas-water separation container 2 to gradually drop, forming a cavity within the container. At this point, the interior of the gas-water separation container 2 is under negative pressure. Under this negative pressure, bubbles in the groundwater within the gas-water separation container 2 are released by the pressure differential, resulting in a bubble-free groundwater entering the temporary water sample storage container 4.

[0047] Next, the groundwater, which contains fewer bubbles, enters the temporary water sample storage container 4. Because a one-way valve 11 is installed in the connecting pipe 401 between the temporary water sample storage container 4 and the overflow container 6, this one-way valve 11 ensures that the water inlet pressure of the temporary water sample storage container 4 is greater than the water outlet pressure, thereby creating a positive pressure state inside the temporary water sample storage container 4. Under positive pressure, the solubility of air in water increases, which allows bubbles in the groundwater inside the temporary water sample storage container 4 to dissolve. The volume of some bubbles also decreases due to the high pressure, further reducing the bubble content in the groundwater inside the temporary water sample storage container 4.

[0048] Finally, when the water quality detection sensor 5 monitors the groundwater in the water sample storage container 4, since the bubble content in the groundwater has been greatly reduced, the interference of bubbles on the monitoring results is also reduced, thereby effectively improving the accuracy and reliability of the monitoring data.

[0049] In some embodiments, groundwater contains a lot of impurities. After long-term use, these impurities will adhere to the surface of the water quality detection sensor 5. This will not only reduce the detection accuracy of the water quality detection sensor 5 and affect the accuracy and reliability of the monitoring data, but also require regular maintenance and cleaning of the sensor surface, which is a more cumbersome operation.

[0050] In order to effectively address this problem, a water flow regulating valve 7 is provided at the connection point between the overflow container 6 and the water sample storage container 4. The water flow regulating valve 7 is configured to make the flow rate of groundwater located in the water sample storage container 4 when flowing to the overflow container 6 smaller than the flow rate of groundwater located in the overflow container 6 when flowing to the water sample storage container 4; the pumping assembly is also configured to be able to pump the groundwater located in the overflow container 6 into the water sample storage container 4; the third end of the water inlet pipe 1 is unidirectionally connected to the overflow container 6, and the connection direction is from the third end of the water inlet pipe 1 to the overflow container 6.

[0051] Specifically in this embodiment, the third end of the water inlet pipe 1, when installed, is perpendicular and extends through the upper end surface of the overflow container 6 and into the interior of the overflow container 6, ensuring communication with the overflow container 6. To facilitate one-way communication between the third end of the water inlet pipe 1 and the overflow container 6, a one-way valve 11 is inserted into the third end of the water inlet pipe 1. Optionally, the one-way valve 11 is configured to include a second valve body 1101. The second valve body 1101 is inserted into the third end of the water inlet pipe 1 when installed. The second valve body 1101 has two second openings arranged in an upper and lower direction. The upper second opening is connected to both the first and second ends of the water inlet pipe 1, and the lower second opening is connected to the overflow container 6. A second valve core 1202 is inserted into the second valve body 1101. The second valve core 1202 is connected to the second valve body 1101 via a second elastic member. Under the action of the second elastic member, the second valve core 1202 has a tendency to block the lower second opening.

[0052] Optionally, the second valve core 1202 can be configured as a spherical structure.

[0053] Optionally, the second elastic member is a second compression spring 1203 , which is vertically arranged and located above the second valve core 1202 . The second compression spring 1203 is connected between the second valve body 1101 and the second valve core 1202 .

[0054] It is understandable that the one-way valve 11 can also be set to a lift type, a swing type, etc.

[0055] During use, the peristaltic pump 301 is started in reverse, and the peristaltic pump 301 sucks the groundwater in the water sample storage container 4 into the air-water separation container 2, and then discharges the groundwater in the air-water separation container 2 into the overflow container 6 through the third end of the water inlet pipe 1; the groundwater in the overflow container 6 is sucked into the water sample storage container 4, forming a cycle.

[0056] During the groundwater circulation process, when the groundwater in the overflow container 6 is pumped into the water sample storage container 4, on the one hand, the groundwater can reversely flush the surface of the water quality detection sensor 5, thereby removing impurity particles attached to it. This active cleaning method avoids the tediousness of traditional manual maintenance, ensuring that the water quality detection sensor 5 always maintains a good detection state, effectively improving detection accuracy and data reliability. On the other hand, the negative pressure state in the air-water separation container 2 and the pressure differential driving mechanism formed by the water sample storage container 4 optimize the backwashing process from the dual dimensions of fluid mechanics and mechanical transmission. According to the Bernoulli equation, when the air-water separation container 2 maintains a negative pressure state (set as P1, P1 < atmospheric pressure) and the water sample storage container 4 maintains a positive pressure state (set as P2, P2 > atmospheric pressure), the pressure difference ΔP = (P2 - P1) forms a positive pressure gradient. When the peristaltic pump 301 is started in the reverse direction, this pressure difference will produce two synergistic effects: First, at the fluid transmission level, the pressure differential directly acts on the flow path from the water sample storage container 4 to the gas-water separation container 2, generating a driving force in the same direction as the peristaltic pump 301's suction. According to Darcy's law, the fluid flow rate Q is proportional to the pressure differential ΔP (Q = K * ΔP * A / L, where K is the flow channel permeability coefficient, A is the flow area, and L is the flow channel length). This increases the actual reverse flow rate at the same peristaltic pump 301 speed. When the power P of the peristaltic pump 301 remains unchanged (P = T * n / 9550, where T is torque and n is speed), the pressure differential drive reduces the system's resistance torque T. According to the formula, speed n is inversely proportional to torque T, that is, n = 9550P / T. Therefore, when P is constant, a decrease in T will result in a corresponding increase in speed n.

[0057] Secondly, at the mechanical transmission level, the positive hydraulic pressure generated by the pressure differential helps the peristaltic pump 301 rotor overcome frictional resistance. Taking the typical structure of peristaltic pump 301 as an example, the suction torque T1 generated by the rotor squeezing the hose is balanced by the fluid resistance torque T2 (T = T1 - T2). When the hydraulic pressure generated by the pressure differential ΔP partially offsets the fluid resistance, T2 decreases, reducing the total torque T, thereby driving the rotational speed n higher and facilitating the reverse flow of groundwater.

[0058] At the same time, the one-way connection between the third end of the water inlet pipe 1 and the overflow container 6 allows the cleaning water containing impurities to enter the overflow container 6 through the one-way channel during the cleaning process and eventually be discharged into the external environment, effectively avoiding the retention of cleaning water in the gas-water separation container 2 and the water sample storage container 4, thereby preventing residual impurities from interfering with subsequent detection results, ensuring that each monitoring is based on a fresh water sample, and ensuring the accuracy and reliability of the monitoring data.

[0059] In addition, the setting of the water flow regulating valve 7 makes the flow rate of the groundwater located in the water sample storage container 4 when flowing to the overflow container 6 smaller than the flow rate of the groundwater located in the overflow container 6 when flowing to the water sample storage container 4. This can ensure that the water inlet pressure of the water sample storage container 4 is greater than the water outlet pressure, and can also ensure that the flow rate of the groundwater located in the overflow container 6 when flowing to the water sample storage container 4 is larger, thereby ensuring the cleaning effect of the surface of the water quality detection sensor 5.

[0060] Specifically, to ensure that the peristaltic pump 301 can pump the groundwater in the overflow container 6 into the water sample temporary storage container 4 , the bottom end of the connecting pipe 401 is arranged at a lower height in the overflow container 6 than the overflow pipe 601 .

[0061] In a further embodiment, the water flow regulating valve 7 is configured to include a first valve body 701, the first valve body 701 has two first ports 7011 that are interconnected, one of the first ports 7011 being connected to the water sample temporary storage container 4, and the other first port 7011 being connected to the overflow container 6; a first valve core 702 is inserted into the first valve body 701, and the first valve core 702 is connected to the first valve body 701 through a first elastic member. Under the action of the first elastic member, the first valve core 702 has a tendency to move toward the direction of the first port 7011 that is connected to the overflow container 6; a through hole 7021 is provided on the first valve core 702, and the through hole 7021 is connected to the two first ports 7011 at the same time.

[0062] Specifically in this embodiment, the first valve body 701 is inserted into the bottom end of the connecting pipe 401, and the two first openings 7011 are arranged in the up and down directions, wherein the upper first opening 7011 is connected to the connecting pipe 401, and the lower first opening 7011 is connected to the overflow container 6.

[0063] Optionally, the first valve core 702 may be configured as a spherical structure. The through hole 7021 is a columnar structure, extending in the up-down direction and passing through the center of the first valve core 702 .

[0064] Optionally, the first elastic member is a first compression spring 703 , which is vertically arranged and located above the first valve core 702 . The first compression spring 703 is connected between the first valve body 701 and the first valve core 702 .

[0065] During use, when the peristaltic pump 301 is started in the forward direction, the peristaltic pump 301 draws groundwater into the air-water separation container 2 through the water inlet pipe 1. At this time, under the action of the first compression spring 703, the first valve core 702 abuts against the first opening 7011 located below, so that the groundwater in the water sample storage container 4 can only enter the overflow container 6 through the through hole 7021. Since the size of the through hole 7021 is small, the water inlet pressure of the water sample storage container 4 is ensured to be greater than the water outlet pressure.

[0066] When the peristaltic pump 301 is started in reverse, the peristaltic pump 301 sucks the groundwater in the overflow container 6 into the water sample storage container 4. At this time, under the impact of the groundwater in the overflow container 6, the first valve core 702 moves upward, and the first compression spring 703 is compressed, so that the groundwater in the overflow container 6 can simultaneously pass through the through hole 7021 and the gap between the first valve core 702 and the first valve body 701 into the water sample storage container 4, thereby ensuring that the groundwater in the overflow container 6 has a large flow rate when flowing to the water sample storage container 4, thereby ensuring the cleaning effect of the surface of the water quality detection sensor 5.

[0067] In other embodiments, in order to further improve the cleaning effect of the surface of the water quality detection sensor 5, a nozzle 8 is inserted into the water sample storage container 4, the nozzle of the nozzle 8 is directed toward the water quality detection sensor 5, and the nozzle 8 is set at the connection point between the water sample storage container 4 and the overflow container 6.

[0068] Specifically in this embodiment, the nozzle 8 is inserted into the bottom of the water sample temporary storage container 4 , with the small opening facing upward and the large opening being sleeved on the top of the connecting pipe 401 .

[0069] During use, the nozzle 8 is set with the small opening facing upward, so that the flow cross-sectional area of groundwater will be reduced when it passes through the nozzle 8. According to the principles of fluid mechanics, under the condition of constant flow rate, the reduction of the flow cross-sectional area will lead to a significant increase in flow rate. After the high-speed water flow is ejected from the small opening of the nozzle 8, it directly rushes to the surface of the water quality detection sensor 5, forming a strong scouring force, which can effectively remove pollutants, impurities, etc. attached to the surface of the sensor.

[0070] In other embodiments, in order to further improve the detection accuracy of the water quality detection sensor 5, a filter is provided at the connection between the second end and the gas-water separation container 2, and the filter is configured to filter groundwater.

[0071] Specifically in this embodiment, the filter element is a filter plate 9 , a plurality of filter holes are provided on the plate surface of the filter plate 9 , and the plate surface of the filter plate 9 and the axis of the second end of the water inlet pipe 1 are perpendicularly arranged.

[0072] During use, when peristaltic pump 301 draws groundwater into gas-water separation container 2 through water inlet pipe 1, filter plate 9 intercepts suspended particles, colloidal impurities, and other impurities in the groundwater. This significantly reduces the amount of impurities entering gas-water separation container 2 and temporary water sample storage container 4, preventing impurities from adhering to the surface of water quality detection sensor 5 and causing a decrease in detection accuracy, thereby ensuring the reliability of monitoring data. Furthermore, when filter plate 9 becomes clogged due to impurity accumulation, the reduced diameter of the filter pores causes a nonlinear decrease in the inlet pressure of gas-water separation container 2. This flow rate change further intensifies the negative pressure environment within gas-water separation container 2. According to the principles of fluid mechanics, the increased negative pressure accelerates the escape of dissolved gases in the groundwater, allowing bubbles to more fully precipitate within gas-water separation container 2, thereby ensuring that the groundwater entering temporary water sample storage container 4 is in a low-bubble state. This process has a dual effect on water quality monitoring: the low-bubble environment not only reduces the physical interference of bubbles on water quality detection sensor 5 but also eliminates optical detection errors caused by bubble adhesion, fundamentally improving the accuracy and reliability of monitoring data.

[0073] In terms of system operation logic, when the peristaltic pump 301 draws groundwater from the overflow container 6 into the water sample storage container 4, the reverse flow of groundwater flushes the filter plate 9. This backflushing process, following the principles of fluid dynamics, effectively removes blockages in the filter pores, maintaining the filter efficiency of the filter plate 9 at a stable level, preventing degradation of filtration performance due to long-term use and ensuring the continuity and stability of the subsequent groundwater treatment process.

[0074] In other embodiments, in order to improve the separation effect of groundwater and bubbles in the air-water separation container 2, the position where the air-water separation container 2 and the water inlet pipe 1 are connected is located above the position where the air-water separation container 2 and the pumping component are connected.

[0075] Specifically, in this embodiment, during operation of the continuous groundwater sample monitoring device, groundwater flows through the water inlet pipe 1 from the upper region of the gas-water separation container 2, forming a top-down flow path under the action of gravity. The peristaltic pump 301, in turn, suctions the groundwater at the bottom, creating a negative pressure region at the bottom of the gas-water separation container 2. According to Stokes' law, bubbles in the groundwater generate an upward buoyancy force due to density differences. Under the synergistic effect of the negative pressure drainage and buoyancy, the bubbles move from bottom to top along the inner wall of the gas-water separation container 2, forming a stable countercurrent field with the groundwater flowing from top to bottom.

[0076] On the one hand, this prolongs the contact time between bubbles and groundwater, providing sufficient dynamic conditions for bubble aggregation, enabling tiny bubbles to collide and aggregate into larger bubbles during the rising process, thereby improving the escape efficiency; on the other hand, the shear force field formed by reverse convection can effectively destroy the interface film between bubbles and water bodies, promote the separation of bubbles from the liquid phase, and thus help improve the separation effect between bubbles and groundwater.

[0077] In a further embodiment, in order to further improve the separation effect of groundwater and bubbles in the air-water separation container 2, a partition plate 10 is provided in the air-water separation container 2, and the partition plate 10 is configured to block the direct flow of groundwater to the pumping component.

[0078] Specifically in this embodiment, the plate surface of the partition plate 10 is vertically arranged and extends in the left and right directions. The top end of the partition plate 10 and the top of the air-water separation container 2 are spaced apart, and the bottom end of the partition plate 10 and the bottom of the air-water separation container 2 are spaced apart.

[0079] During use, when the groundwater enters the interior of the air-water separation container 2 from the water inlet pipe 1, under the action of gravity, the groundwater will form an arc-shaped flow trajectory, and then hit the front plate surface of the partition plate 10. Under the obstruction of the partition plate 10, the groundwater will first move from top to bottom along the front plate surface of the partition plate 10, and then merge into the water body inside the air-water separation container 2, thereby extending the flow path of the groundwater entering the air-water separation container 2 from the water inlet pipe 1, and extending its residence time in the air-water separation container 2, thereby helping to improve the separation effect between bubbles and groundwater.

[0080] In other embodiments, the pumping component can also be configured to include a second water pump, the pumping end of the second water pump is connected to the air-water separation container 2 and the water sample temporary storage container 4 respectively through a three-way pipe, and a reversing solenoid valve is inserted in the three-way pipe, and the reversing solenoid valve is configured to enable the pumping end of the second water pump to be connected to the air-water separation container 2 or the pumping end of the second water pump to be connected to the water sample temporary storage container 4; the water pumping end of the second water pump is connected to the air-water separation container 2 and the water sample temporary storage container 4 respectively through a three-way pipe, and a reversing solenoid valve is inserted in the three-way pipe, and the reversing solenoid valve is configured to enable the water pumping end of the second water pump to be connected to the air-water separation container 2 or the water pumping end of the second water pump to be connected to the water sample temporary storage container 4.

[0081] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and modifications are possible without departing from the scope of the present invention, and such variations and modifications are fully within the scope of protection of the present invention.

Claims

1. A continuous monitoring device for groundwater samples, characterized in that: The continuous monitoring equipment for groundwater samples includes: a water inlet pipe, wherein a first end of the water inlet pipe is in communication with groundwater; An air-water separation container, the air-water separation container is in communication with the second end of the water inlet pipe; an exhaust port is provided on the air-water separation container, the exhaust port is in one-way communication with the external environment, and the communication direction is from the air-water separation container to the external environment; the first end and the second end of the water inlet pipe are in one-way communication, and the communication direction is from the first end to the second end of the water inlet pipe; a water pumping assembly, connected to the air-water separation container and configured to pump the groundwater; the water inlet pressure of the air-water separation container is lower than the water outlet pressure; a water sample temporary storage container, connected to the pumping assembly and configured to temporarily store the groundwater; a water quality detection sensor, disposed on the water sample temporary storage container and configured to detect the water quality of the groundwater in the water sample temporary storage container; The overflow container is connected to the water sample temporary storage container and is configured to receive groundwater in the water sample temporary storage container and discharge it to the external environment; the water inlet pressure of the water sample temporary storage container is greater than the water outlet pressure.

2. The continuous monitoring device for groundwater samples according to claim 1, characterized in that: A water flow regulating valve is provided at the connection point between the overflow container and the water sample temporary storage container. The water flow regulating valve is configured to make the flow rate of groundwater located in the water sample temporary storage container when flowing to the overflow container smaller than the flow rate of groundwater located in the overflow container when flowing to the water sample temporary storage container; the pumping assembly is also configured to pump the groundwater located in the overflow container into the water sample temporary storage container; the third end of the water inlet pipe is unidirectionally connected to the overflow container, and the connection direction is from the third end of the water inlet pipe to the overflow container.

3. The continuous monitoring device for groundwater samples according to claim 2, characterized in that: A nozzle is inserted into the water sample temporary storage container, the nozzle opening of the nozzle faces the water quality detection sensor, and the nozzle is arranged at the connection point between the water sample temporary storage container and the overflow container.

4. The continuous monitoring device for groundwater samples according to claim 2, characterized in that: The water flow regulating valve includes a first valve body, which has two first ports that are interconnected, one of which is connected to the water sample temporary storage container, and the other of which is connected to the overflow container; a first valve core is inserted in the first valve body, and the first valve core is connected to the first valve body through a first elastic member, and under the action of the first elastic member, the first valve core has a tendency to move toward the direction of the first port that is connected to the overflow container; a through hole is provided on the first valve core, and the through hole is connected to the two first ports at the same time.

5. The continuous monitoring device for groundwater samples according to claim 4, characterized in that: The first elastic member is a first compression spring.

6. The continuous monitoring device for groundwater samples according to claim 1, characterized in that: A filter is provided at the connection point between the second end of the water inlet pipe and the air-water separation container, and the filter is configured to filter the groundwater.

7. The continuous monitoring device for groundwater samples according to claim 6, characterized in that: The filter element is a filter plate, a plurality of filter holes are arranged on the plate surface of the filter plate, and the plate surface of the filter plate and the axis of the second end of the water inlet pipe are arranged perpendicularly.

8. The continuous monitoring device for groundwater samples according to claim 1, characterized in that: The position where the air-water separation container is connected to the water inlet pipe is located above the position where the air-water separation container is connected to the water pumping component.

9. The continuous monitoring device for groundwater samples according to claim 8, characterized in that: A partition plate is provided in the gas-water separation container, and the partition plate is configured to block the direct flow of the groundwater to the pumping assembly.

10. The continuous monitoring device for groundwater samples according to claim 1, characterized in that: The water pumping assembly includes a peristaltic pump.

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