Embedded multi-point groundwater water quality sampling device and sampling method

Abstract

The present invention discloses a buried multi-point groundwater water quality sampling device, belonging to the technical field of water quality monitoring. The sampling device includes a sampling system and a control system. The sampling system includes a submersible pump disposed in the well. The control system includes a controller. The submersible pump is detachably connected to the controller. The controller is used to control the start and stop of the submersible pump. The sampling system further includes a pump pipe and a cable. The water outlet end of the submersible pump is connected to the controller through the pump pipe and the cable. The sampling system further includes a steel cable. The steel cable is disposed on the submersible pump. A hook for fixing the steel cable is provided at the wellhead. By presetting the submersible pump in the monitoring well, the present invention saves the conventional sampling steps and improves the sampling timeliness.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring, and particularly relates to a buried multi-point groundwater water quality sampling device and a sampling method. Background Art

[0002] Currently, dedicated wells for groundwater level monitoring are mainly designed for dynamic monitoring of groundwater levels. When conducting water quality sampling, the following problems and difficulties exist: Most dedicated wellheads are small, and large submersible pumps cannot be used for pumping and washing the wells; The monitoring wells are dedicated water level observation wells with generally small diameters. Before sampling, the water level monitoring instruments need to be taken out, and then reinstalled and calibrated after sampling. Such operations will seriously affect the service life and measurement accuracy of the water level monitoring instruments. Some monitoring well equipment cannot work properly after sampling, seriously interfering with normal groundwater level observation work; For monitoring wells with a large groundwater depth, a dedicated sampling pump needs to be equipped. The pump body is very heavy, and operations such as lowering the pump are time-consuming and laborious. It is even difficult to complete the sampling of one well in a day, and there are great safety hazards; Some wells are located in places where sampling facilities are difficult to reach. If sampling is carried out, it will cause damage to trees, crops, etc., and need to be restored as original, resulting in extremely high sampling costs; The water level monitoring equipment in the water level wells uses low-power batteries, and the power is far from meeting the needs of the water pump; In the sampling work, mainly the power generation equipment and the monitoring equipment are connected and used separately, and there is no targeted sampling equipment. During the process, the connection heads are exposed, and the water pipe sealing performance is poor, there are certain safety hazards; The work in the well washing process mainly includes flow calculation and water quality monitoring, etc. Currently, it mainly relies on manual implementation for manual recording, measurement, calculation, etc., with low efficiency and no strict timeliness, and it is difficult to achieve overall control of process consistency.

[0003] The US patent with the application number US17793131 discloses an environmental groundwater sampling system. The sampling system includes: a water pump immersed in the groundwater in the well; a sensor for detecting the groundwater depth; and a controller communicating with the sensor. The controller receives the signal of the water depth and adjusts the pumping ground flow rate to stabilize the groundwater depth in the well. This system requires staff to lower the water pump into the well when sampling, which is time-consuming and laborious; Moreover, during the water pump suction sampling process, the pump body is prone to shaking and hitting the inner wall of the well, and the volatilization of organic matter in the water body is caused, resulting in inaccurate water quality monitoring results. Summary of the Invention

[0004] The purpose of the present invention is to provide a buried multi-point groundwater water quality sampling device and a sampling method with high sampling efficiency and high stability.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: a pre-buried groundwater multi-point water quality sampling device, including a sampling system and a control system, the sampling system includes a submersible pump arranged in a well, the control system includes a controller, the submersible pump and the controller are detachably connected, and the controller is used to control the start and stop of the submersible pump. The submersible pump is directly buried in the monitoring well. When sampling is required, the mobile controller is carried to the target site, the controller is connected to the pre-buried submersible pump, and the submersible pump is controlled by the controller to suck and sample the water body. The pre-buried modification scheme eliminates the processes of pump body placement, pump body removal, monitoring equipment placement, and post-sampling calibration in conventional water inlet sampling, greatly reducing manual operations, improving the timeliness of sampling monitoring, and meeting the needs of emergency monitoring. Since the submersible pump has been preset in the well before sampling, the possibility of damage caused by collision with the well wall during the pulling process of the submersible pump is avoided, and the sampling safety is improved.

[0006] Preferably, the sampling system further includes a pump tube and a cable, and the water outlet of the submersible pump is connected to the controller through the pump tube and the cable. The submersible pump is buried in the well, the water inlet of the submersible pump is located below the liquid level of the water in the well, and the water outlet of the submersible pump is located between the liquid level and the wellhead. The pump tube and the cable can extend out of the wellhead and be fixed and protected by equipment such as a bracket, so as to facilitate the rapid installation of the submersible pump and the controller, which is conducive to improving the collection efficiency.

[0007] Preferably, the sampling system further comprises a steel cable, which is arranged on the submersible pump, and a hook for fixing the steel cable is arranged at the wellhead. The submersible pump is hooked on the hook by the steel cable to form an installation in the well, and the steel cable can be removed from the hook when necessary, which is convenient for maintenance and replacement.

[0008] Preferably, the control system further comprises a power supply for supplying power to the controller.

[0009] Preferably, the controller has a water quality sensor and a flow meter built in. The controller monitors the flow rate and water quality during the pumping process at any time through the flow meter and the water quality sensor, and can take samples when the water quality index meets the specification requirements.

[0010] Preferably, a diversion pipe is provided at the water inlet end of the submersible pump. Inside the diversion pipe, hoods are arranged at intervals. The hood is a conical shell with the small end facing upward. A pipe body is provided at the top of the hood, and the pipe body is located inside the hood above it. Side holes are evenly distributed on the pipe wall of the diversion pipe, and the side holes are arranged between adjacent hoods. During the process of starting the submersible pump and pumping water for sampling, water enters from the pipe orifice of the diversion pipe and passes through each hood. The inner wall of the hood guides the water towards the center of the pipe, forming a main flow velocity channel. At the same time, the water on the side enters the diversion pipe from each side hole under the action of the main flow velocity channel. The outer wall of the hood guides this part of the water towards the center upward, increasing the depth range of sampling, which is beneficial to the accuracy of water quality monitoring. At the same time, the hood guides the water passing through the side holes into the diversion pipe, preventing the water from entering the diversion pipe only from the pipe orifice, and preventing the organic suspended matter in the water from volatilizing after being disturbed, resulting in inaccurate sampling results;

[0011] During the process of closing the submersible pump, some water loses power in the submersible pump and flows downward through the diversion pipe under the influence of gravity. When the water falls downward, it can be guided by the hood to the inner wall of the diversion pipe to form a deceleration, and flows out from the side holes opened on the diversion pipe. That is, it avoids the impact caused by the concentrated fall of water, preventing the sediment in the well from being suspended and affecting the water quality. At the same time, it also stabilizes the posture of the submersible pump by reducing the water disturbance during the fall, preventing it from shaking and hitting the water well;

[0012] When performing segmented sampling, the submersible pump is repeatedly opened and closed. When the submersible pump is closed after one collection, when the water falls back into the well, the water flowing out from multiple side holes forms a horizontal water curtain, which helps to reduce the probability of the organic matter in the water floating and volatilizing, reduces the possibility of organic matter escaping, helps to ensure the authenticity of the water body during the next sampling, and improves the timeliness of water quality monitoring;

[0013] Preferably, a Y-shaped plate is arranged inside the diversion pipe. A channel is formed between the Y-shaped plate and the diversion pipe. A rolling ball is arranged in the channel. A limiting head is arranged on the Y-shaped plate, and the rolling ball can move between the limiting head and the Y-shaped plate. The Y-shaped plate and the limiting head are provided with holes in the middle and are connected. When the submersible pump starts to pump water for sampling, some water passes through the channel between the Y-shaped plate and the diversion pipe and acts on the rolling ball, causing the rolling ball to move upward in the channel and be located below the limiting head. At this time, the water passes through the channel and acts on the rolling ball, causing the rolling ball to rotate around the limiting head, promoting the conversion of the straight-flow water body being pumped into a rotating water body. The water passing through the middle of the Y-shaped plate and the limiting head serves as the guiding water body, carrying the rotating water body upward to flow, thereby increasing the flow velocity and improving the sampling efficiency, and saving the energy consumption of the controller;

[0014] During the sliding process of the rolling ball in the channel, it can scrape off the scale attached to the inner wall of the diversion pipe, preventing the diversion pipe from being blocked and affecting the sampling efficiency;

[0015] When the submersible pump is turned off to stop sampling, the falling water body is decelerated and guided after contacting the rolling ball, further weakening the impact force of the falling water body, so that the water body flows out of the measurement and control gently and out of the nozzle of the diversion pipe and back into the well, improving the ability to prevent suspension.

[0016] Preferably, a frame is provided outside the submersible pump. A clamping plate is arranged around the bottom of the frame. The upper part of the frame is fixedly connected to the submersible pump, and the lower part of the frame is movably connected to the submersible pump. The arrangement of the clamping plate helps to stabilize the attitude of the submersible pump in the well, reducing the possibility of it shaking and knocking against the well wall during the pumping process. The bottom of the frame can move up and down relative to the submersible pump, facilitating the adaptation to submersible pumps of different height dimensions and improving the adaptability.

[0017] Preferably, the clamping plate includes a rotating plate hinged to the bottom of the frame. A coil spring is provided at the hinge of the rotating plate. The rotating plate is connected with at least two elastic frames, and the elastic frames are angled with each other. The coil spring is arranged at the hinge of the rotating plate and the frame, enabling the clamping plate to expand outward with the submersible pump as the center, so that the clamping plate can adapt to water wells of different specifications to achieve the vertical positioning of the submersible pump;

[0018] The elastic frame forms a tension with the inner wall of the well through its own deformation energy, further stabilizing the attitude of the submersible pump.

[0019] The present invention has the following beneficial effects compared with the prior art: The preset scheme of the submersible pump proposes the installation steps of the pump body, improving the sampling timeliness, reducing the possibility of the pump body being damaged by impact, and improving the safety; the diversion pipe guides the water body through the cover body, increasing the flow rate and improving the sampling efficiency; the water body in the side hole is guided by the cover body, expanding the sampling range and avoiding the influence of organic matter volatilization on the monitoring authenticity; the falling water body is decelerated and guided by the cover body, reducing the water impact and preventing sediment suspension from polluting the water quality; the rolling ball can promote the generation of rotating water body and improve the sampling efficiency; the elastic frame stabilizes the vertical attitude of the submersible pump and improves the sampling stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0021] Figure 1 It is a schematic diagram of the system principle of the present invention;

[0022] Figure 2 It is a front view schematic diagram of the submersible pump structure;

[0023] Figure 3 It is a cross-sectional view schematic diagram of the diversion pipe;

[0024] Figure 4 It is a schematic diagram of the Y-shaped plate structure;

[0025] Figure 5 It is a schematic diagram of the frame structure;

[0026] Figure 6 It is a schematic diagram of the elastic frame structure.

[0027] Reference numerals in the drawings: submersible pump 1; pump pipe 10; cable 11; steel cable 12; controller 2; water quality sensor 20; flow meter 21; lithium battery 30; diversion pipe 4; cover body 40; pipe body 41; side hole 42; Y-shaped plate 43; rolling ball 44; limit head 45; frame 5; upper plate 50; lower plate 51; telescopic rod 52; clamping plate 6; rotating plate 60; coil spring 61; elastic frame 62; spring 63. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] First, the concepts involved in this application will be described in conjunction with the accompanying drawings. It should be noted here that the following descriptions of each concept are only for making the content of this application easier to understand and do not represent a limitation on the protection scope of this application; at the same time, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Next, this application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0030] See the attached Figure 1 , the embedded multi-point groundwater water quality sampling device includes a sampling system and a control system. The sampling system includes a submersible pump 1 arranged in the well, and the control system includes a controller 2. The submersible pump 1 is detachably connected to the controller 2, and the controller 2 is used to control the start and stop of the submersible pump 1.

[0031] It should be noted that the submersible pump 1 is a direct current pump made of stainless steel. The submersible pump 1 uses a high-power direct current pump with the model KL-DC07 or a low-power direct current pump with the model KL-DC06;

[0032] Among them, the rated power of the high-power direct current pump is 1100w, the head is 90m, the rated voltage is DC48~60V, and the equipment diameter is 25mm;

[0033] The rated power of the low-power direct current pump is 800w, the head is 65m, the rated voltage is 48~60V, and the equipment diameter is 25mm.

[0034] The model of the controller 2 is KL-DC01, with dimensions of 620*450*250, a total machine weight of 14 kg, a rechargeable power supply method, a rated voltage of DC24V, a current of 2A, and a rated power of 45W. The controller 2 has four functions: well washing, sampling, remote control, and flow regulation; the controller 2 also has four modes: volume-determined well washing and sampling, water quality-determined well washing and sampling, conventional mode power supply sampling, and voltage regulation mode power supply sampling.

[0035] The submersible pump 1 is directly buried in the monitoring well. When sampling is required, carry the mobile controller 2 to the target site, connect the controller 2 to the pre-buried submersible pump 1, and control the submersible pump 1 to suck and sample the water body through the controller 2. This pre-buried transformation plan eliminates processes such as pump body placement, pump body removal, monitoring equipment placement and removal, and post-sampling calibration in conventional water intake sampling, greatly reducing manual operations, improving the timeliness of sampling and monitoring, and meeting the needs of emergency monitoring. Since the submersible pump 1 is preset in the well before sampling, the possibility of damage caused by the submersible pump 1 hitting the well wall during the lifting process is avoided, improving the sampling safety.

[0036] The sampling system also includes a pump pipe 10 and a cable 11. The water outlet end of the submersible pump 1 is connected to the controller 2 through the pump pipe 10 and the cable 11.

[0037] It should be noted that the pump pipe 10 is made of polytetrafluoroethylene, with a model of KL-DC09, an outer diameter of 25mm, a wall thickness of 1.6mm, and a pressure bearing of 6Mpa;

[0038] The cable 11 is made of rubber waterproof material, with a model of JHS2*1.5, its conductor is pure copper, its core wire is PVC insulated core wire, its voltage is 300 / 500V, the filler is nylon / kevlar, and its implementation standard refers to TL / Q13-91.

[0039] The submersible pump 1 is buried in the well. The water inlet end of the submersible pump 1 is below the water level of the well water body, and the water outlet end of the submersible pump 1 is between the water level and the wellhead. The pump pipe 10 and the cable 11 can extend out of the wellhead and are fixed and protected by equipment such as brackets, so as to facilitate the rapid installation of the submersible pump 1 and the controller 2, which is beneficial to improving the collection efficiency.

[0040] The sampling system also includes a steel cable 12. The steel cable 12 is arranged on the submersible pump 1, and a hook for fixing the steel cable 12 is provided at the wellhead. The submersible pump 1 is hung on the hook by relying on the steel cable 12 to form an installation in the well. When needed, the steel cable 12 can be removed from the hook, which is convenient for maintenance and replacement.

[0041] It should be noted that the steel cable 12 is made of pure stainless steel 305, with a model of stainless steel 304 - 5mm, a structure of 7 * 19, an outer diameter of 5mm, a weight of 10.12kg / 100m, and a theoretical load-bearing capacity of 325kg.

[0042] The control system also includes a power supply, which is used to supply power to the controller 2.

[0043] It should be noted that the power supply adopts a lithium battery power supply method. The lithium battery model is KL - DC02, with dimensions of 500 * 220 * 200, an overall weight of 20kg, a rated voltage of DC60V, a current of 12A, and a battery capacity of 21AH.

[0044] The controller 2 is internally equipped with a water quality sensor 20 and a flow meter 21. The controller 2 monitors the flow rate and water quality during the pumping process at any time through the flow meter 21 and the water quality sensor 20. When the water quality index meets the specification requirements, sampling can be carried out.

[0045] It should be noted that the control system also includes auxiliary tools, which include a wellhead support, a cable reel, and a field trolley, etc. The wellhead support is used to fix the wellhead-related equipment, place the corresponding boxes and pipeline equipment to facilitate the connection and application of related equipment. The model of the wellhead support is KL - DC03, with dimensions of 250 * 120 * 150, an equipment weight of 0.75kg, and the material is stainless steel;

[0046] To ensure the storage and transportation of the battery and the cable 11, a cable reel that can automatically wind and unwind is specially configured. The model of the cable reel is KL - DC04, and the equipment weight is 3.5kg.

[0047] Generally, the vehicle can be placed near the wellhead. In this case, it is planned to place the power supply in the vehicle's trunk and connect it to the controller 2 with a connecting wire to provide power, without moving the battery. In the case where the vehicle cannot enter at individual points, an off-road trolley can be used, which is suitable for various terrains and is beneficial for equipment movement. The model of the trolley is KL - DC05, with a bracket size of 90 * 55 * 35cm, an equipment weight of 7.5kg, a loading capacity of 150L, a loading weight of 100kg, and the material is steel.

[0048] The control system also includes a fast charging device. To ensure there are sufficient batteries, a fast indoor charging device is designed in the solution. It adopts a floor-standing integrated design, can achieve simultaneous charging of 8 channels, and uses designs such as flame retardant, explosion-proof, and leakage protection to avoid safety accidents such as deflagration. The device adopts a drawer-type design for convenient access and operation, and is equipped with a fast charging connector, charging indicator, switch indicator, etc., which is convenient for charging and understanding the charging status. The model of the fast charging device is KL-DC08, the product size is 1350*700*500, the total machine weight is 75 kg, the number of charging channels is 8, the rated voltage is AC220V input / DC60V output, the current is 12A, and the rated power is 2300W.

[0049] See Appendix Figure 2 - Appendix Figure 3 For the submersible pump 1, a diversion pipe 4 is provided at the water inlet end. A plurality of cover bodies 40 are arranged at intervals in the diversion pipe 4. The cover body 40 is a conical shell with the small end facing upward. A pipe body 41 is provided at the top of the cover body 40. The pipe body 41 is located inside the cover body 40 above it. The side walls of the diversion pipe 4 are evenly provided with side holes 42, and the side holes 42 are arranged between adjacent cover bodies 40.

[0050] It should be noted that the cover bodies 40 are arranged at equal intervals along the extension direction of the pipe in the diversion pipe 4, and the bottom of the cover body 40 is fixed to the inner wall of the diversion pipe 4.

[0051] During the process of starting the submersible pump 1 and pumping water for sampling, the water body enters from the pipe orifice of the diversion pipe 4 and passes through each cover body 40. The inner wall of the cover body 40 guides the water body towards the center of the pipe, forming a mainstream velocity channel. At the same time, the water body on the side enters the diversion pipe 4 from each side hole 42 under the action of the mainstream velocity channel. The outer wall of the cover body 40 guides this part of the water body towards the center above, increasing the sampling depth range, which is beneficial to the accuracy of water quality monitoring. At the same time, the cover body 40 guides the water body passing through the side holes 42 into the diversion pipe 4, avoiding the water body from concentrating and entering from the pipe orifice of the diversion pipe 4, preventing the volatilization of organic suspended matter in the water body after disturbance, resulting in inaccurate sampling results;

[0052] During the process of shutting down the submersible pump 1, part of the water body loses power in the submersible pump 1 and flows downward through the diversion pipe 4 under the influence of gravity. When the water body falls downward, it can be guided by the cover body 40 towards the inner wall of the diversion pipe 4 to form a deceleration and flow out from the side holes 42 opened in the diversion pipe 4. That is, it avoids the concentrated backflow of the water body to form an impact, resulting in the suspension of well sediments and affecting water quality. At the same time, it also stabilizes the attitude of the submersible pump 1 by reducing the water body disturbance during the backflow, preventing it from shaking and hitting the water well;

[0053] During segmented sampling, the submersible pump 1 repeatedly opens and closes. When the submersible pump 1 closes after one collection and the water body falls back into the well, the water flowing out from multiple side holes 42 forms a horizontal water curtain, which helps to reduce the probability of organic matter floating and volatilizing in the water body, reduces the possibility of organic matter escaping, helps to ensure the authenticity of the water body during the next sampling, and improves the timeliness of water quality monitoring;

[0054] See the appendix Figure 4 , a Y-shaped plate 43 is arranged in the diversion pipe 4. A channel is formed between the Y-shaped plate 43 and the diversion pipe 4. A rolling ball 44 is arranged in the channel. A limiting head 45 is arranged on the Y-shaped plate 43. The rolling ball 44 can move between the limiting head 45 and the Y-shaped plate 43. The Y-shaped plate 43 and the limiting head 45 are provided with openings in the middle and are connected.

[0055] When the submersible pump 1 starts to pump water for sampling, part of the water body passes through the channel between the Y-shaped plate 43 and the diversion pipe 4 and acts on the rolling ball 44, so that the rolling ball 44 moves upward in the channel and is located below the limiting head 45. At this time, the water body passes through the channel and acts on the rolling ball 44, so that the rolling ball 44 rotates around the limiting head 45, promoting the conversion of the straight-flowing water body being pumped into a rotating water body. The water body passing through the middle of the Y-shaped plate 43 and the limiting head 45 serves as the guiding water body, carrying the rotating water body to flow upward, thereby increasing the flow rate and improving the sampling efficiency, and saving the energy consumption of the controller 2;

[0056] During the sliding process of the rolling ball 44 in the channel, it can scrape off the scale attached to the inner wall of the diversion pipe 4, preventing the diversion pipe 4 from being blocked and affecting the sampling efficiency;

[0057] When the submersible pump 1 closes and stops sampling, the falling water body is decelerated and diverted after contacting the rolling ball 44, further weakening the impact force of the falling water body, so that the water body flows out of the measurement and control gently and flows back into the well from the pipe orifice of the diversion pipe 4, improving the ability to prevent suspension.

[0058] See the appendix Figure 5 , a frame 5 is arranged outside the submersible pump 1. A clamping plate 6 is arranged around the bottom of the frame 5. The upper part of the frame 5 is fixedly connected to the submersible pump 1, and the lower part of the frame 5 is movably connected to the submersible pump 1.

[0059] The setting of the clamping plate 6 helps to stabilize the attitude of the submersible pump 1 in the well, reducing the possibility of it shaking and hitting the well wall during the pumping process. The bottom of the frame 5 can move up and down relative to the submersible pump 1, facilitating the adaptation to submersible pumps 1 of different height dimensions and improving the adaptability.

[0060] See the appendix Figure 6 , the clamping plate 6 includes a rotating plate 60 hinged to the bottom of the frame 5. A coil spring 61 is arranged at the hinge of the rotating plate 60. The rotating plate 60 is connected with at least two elastic frames 62, and the elastic frames 62 are angled with each other.

[0061] It should be noted that at least one elastic frame 62 can be clamped to the well wall relatively horizontally, and at least one elastic frame 62 can be kept laterally of the diversion pipe 4 relatively vertically.

[0062] A torsion spring 61 is arranged at the hinge of the rotating plate 60 and the frame 5, so that the clamping plate 6 can be unfolded outward with the submersible pump 1 as the center, so as to facilitate the clamping plate 6 to adapt to water wells of different specifications to realize the vertical positioning of the submersible pump 1;

[0063] Springs 63 are arranged at intervals in the elastic frame 62.

[0064] The elastic frame 62 can form a tension with the inner wall of the well through its own deformation, further stabilizing the posture of the submersible pump 1. The arrangement of the spring 63 can, on the one hand, improve the strength of the elastic frame 62 and prevent it from deforming and breaking under pressure. On the other hand, through the spring 63, the vibration interference during the pumping of the submersible pump 1 can be consumed, and the noise intensity caused by the transmission of its vibration to the water well can be reduced;

[0065] When one elastic frame 62 is kept horizontally in the well to form the positioning of the submersible pump 1, the other elastic frame 62 is kept vertically on the side of the diversion pipe 4. At this time, relative to the horizontally arranged elastic frame 62, the springs 63 arranged at intervals form a barrier inside the elastic frame 62. When sundries outside the well fall into the well, the springs 63 inside the elastic frame 62 can prevent objects from entering the deep part of the well to pollute the water source. At the same time, by operating to raise the bottom of the frame 5 relative to the submersible pump 1, the springs 63 inside the elastic frame 62 can pick up the objects in the well, facilitating the cleaning of the water source in the well;

[0066] Relative to the vertically arranged elastic frame 62, multiple elastic frames 62 form protection and filtration on the side of the diversion pipe 4, which can not only prevent the blockage of the side holes 42, but also protect the diversion pipe 4.

[0067] The frame 5 includes an upper plate 50 and a lower plate 51. The upper plate 50 is fixed to the upper part of the submersible pump 1. The lower plate 51 is sleeved on the lower part of the submersible pump 1 and is slidably arranged. A plurality of telescopic rods 52 are connected between the upper plate 50 and the lower plate 51. The telescopic rods 52 surround the outside of the submersible pump 1, and the rotating plate 60 is hinged at the bottom end of the lower plate 51.

[0068] It should be noted that the lower plate 51 is connected with a pull rope, and the end of the pull rope is arranged at the wellhead.

[0069] The telescopic rods 52 form a side protection for the submersible pump 1. When pollutants fall into the well, by pulling the pull rope, the lower plate slides upward relative to the pump body, thereby driving a plurality of horizontally arranged elastic frames 62 to move upward, so that the springs 63 in the elastic frames 62 fish up the pollutants to realize the cleaning of the well.

[0070] For the buried type groundwater multi-point water quality sampling device, the specific sampling method is as follows:

[0071] Step 1: Conduct pumping and well flushing on the well to be sampled. The well flushing method is implemented according to 3 - 5 times the water column volume in Standard HJ164;

[0072] Step 2: Connect the carried controller 2 to the pre - embedded submersible pump 1 to achieve power supply and control connection for the submersible pump 1;

[0073] Step 3: Control the submersible pump 1 through the controller 2 to sample the well water;

[0074] Step 4: After the sampling is completed, recover the controller 2 and restore the rest of the original equipment.

[0075] The above - mentioned embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for realizing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, may make some changes or modifications to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the essence of the present invention.

[0076] In this article, specific examples are used to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. The above are only the preferred implementation manners of the present application. It should be noted that due to the limitation of literal expression and objectively existing infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present application, several improvements, refinements or changes can be made, or the above - mentioned technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present application.

Claims

1. Pre-buried groundwater multi-point water quality sampling device, including sampling system and control system, It is characterized in that: The sampling system comprises a submersible pump (1) arranged in a well, the control system comprises a controller (2), the submersible pump (1) and the controller (2) are detachably connected, and the controller (2) is used to control the start and stop of the submersible pump (1). The submersible pump (1) is provided with a guide pipe (4) at a water inlet end, and covers (40) are arranged at intervals inside the guide pipe (4). The cover (40) is a conical shell with a small end facing upwards. A tube body (41) is provided on the top of the cover (40), and the tube body (41) is located on the inner side of the cover (40) above it. The covers (40) are arranged at equal distances in the guide pipe (4) along the extension direction of the pipe. The pipe wall of the guide pipe (4) is evenly distributed with side holes (42), and the side holes (42) are arranged between adjacent covers (40). When falling downwards, water can be guided to the inner wall of the guide pipe (4) through the cover (40), thereby reducing speed, and then flowing out from the side holes (42) opened in the guide pipe (4).

2. The embedded multi-point groundwater water quality sampling device according to claim 1, characterized in that: The sampling system further comprises a pump tube (10) and a cable (11), and the water outlet end of the submersible pump (1) is connected to the controller (2) via the pump tube (10) and the cable (11).

3. The embedded multi-point groundwater water quality sampling device according to claim 1, characterized in that: The sampling system further comprises a steel cable (12), wherein the steel cable (12) is arranged on the submersible pump (1), and a hook for fixing the steel cable (12) is provided at the wellhead.

4. The buried multi-point groundwater water quality sampling device according to claim 1, characterized in that: The control system further comprises a power supply, which is used to supply power to the controller (2).

5. The buried multi-point groundwater water quality sampling device according to claim 1, characterized in that: The controller (2) has a water quality sensor (20) and a flow meter (21) built into it.

6. The embedded multi-point groundwater water quality sampling device according to claim 1, wherein: A Y-shaped plate (43) is arranged in the guide tube (4), the Y-shaped plate (43) and the guide tube (4) form a channel, a rolling ball (44) is arranged in the channel, a limiting head (45) is arranged on the Y-shaped plate (43), the rolling ball (44) can move between the limiting head (45) and the Y-shaped plate (43), and the Y-shaped plate (43) and the limiting head (45) have a hole in the middle and are in communication.

7. The buried multi-point groundwater water quality sampling device according to claim 1, characterized in that: A frame (5) is provided on the outside of the submersible pump (1), a clamping plate (6) is provided around the bottom of the frame (5), the upper part of the frame (5) is fixedly connected to the submersible pump (1), and the lower part of the frame (5) is movably connected to the submersible pump (1).

8. The buried multi-point groundwater water quality sampling device according to claim 7, characterized in that: The clamping plate (6) comprises a rotating plate (60) hinged to the bottom of the frame (5); a coil spring (61) is provided at the hinge of the rotating plate (60); the rotating plate (60) is connected to two elastic frames (62); the elastic frames (62) are at an angle to each other.

9. A method for pre-buried groundwater multi-point water quality sampling, using the pre-buried groundwater multi-point water quality sampling device according to claim 1, characterized by the following steps: a. Pump water to wash the sampling wells; b. Connecting the carried controller (2) to the pre-buried submersible pump (1); c. Controlling the submersible pump (1) to sample well water through the controller (2); d. After the collection is completed, the controller (2) is recovered.

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