Monitoring equipment for sand groundwater protection and use method thereof

Abstract

The invention relates to the technical field of underground water protection, and discloses monitoring equipment for sand land underground water protection and a using method thereof.The monitoring equipment comprises a surface water collecting unit, a water conveying pipeline, a water quality online monitoring module, a central control module and a flow regulation and control executing mechanism; the central control module controls the flow regulation and control execution mechanism through water quality parameter data monitored by the water quality on-line monitoring module, and when the detection result of the water quality on-line monitoring module is qualified, a first control instruction is generated and sent to the flow regulation and control execution mechanism, so that the flow regulation and control execution mechanism is kept open or regulated to preset supply flow; when the detection result of the water quality on-line monitoring module is unqualified, a second control instruction is generated and sent to the flow regulation and control executing mechanism, and unqualified water is prevented from converging into the deep water layer from the water conveying pipeline; by arranging the water conveying pipeline communicating the shallow water layer with the deep water layer, sand surface water is guided into the deep water layer, evaporation of the surface water is reduced, and the water content of the sand deep layer underground water is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of groundwater protection, in particular to a monitoring device for sand ground water protection and a use method thereof. BACKGROUND

[0002] The sand ground water and the conventional land ground water have significant differences in formation conditions, distribution characteristics, water quality and utilization methods, etc. The sand ground water is mainly supplied by the rare natural rainfall and the seasonal river infiltration, and the supply rate is extremely slow. The water supplied by the rainfall is gathered in the shallow layer of the sand ground and sporadically distributed in the sand dune interdune depression, and is easy to evaporate. At the same time, due to the evaporation characteristics, the evaporation concentration salt is caused, and the mineralization degree is high, and harmful elements such as fluorine and arsenic are contained. Therefore, the monitoring device for sand ground water protection and the use method thereof are provided. SUMMARY

[0003] In view of the defects of the prior art, the present application provides a monitoring device for sand ground water protection and a use method thereof, which has advantages and solves problems.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a monitoring device for sand ground water protection and a use method thereof, comprising: A surface water collecting unit is configured to collect surface runoff and shallow infiltration water in a sand ground environment. The surface water collecting unit includes a water inlet and a sandstone filter material and a waterproof membrane for preliminary sedimentation and filtration. A water delivery pipeline, the water inlet end of the water delivery pipeline is in communication with the water outlet of the surface water collecting unit, and the water outlet end of the water delivery pipeline is in communication with the deep water layer, for guiding and conveying the surface water treated by the surface water collecting unit; A water quality online monitoring module is installed in the water delivery pipeline and is located in the flow channel of the guiding and conveying. The water quality online monitoring module detects the physical and chemical properties of the water flow in the water delivery pipeline in real time and continuously during the water delivery process. A central control module includes a microprocessor, a data storage unit and a communication interface. The communication interface is in wireless data communication connection with the water quality online monitoring module to receive real-time water quality parameter data generated by the water quality online monitoring module. The data storage unit pre-stores one or more sets of water quality parameter thresholds corresponding to the deep ground water safety standards. A flow control execution mechanism is installed in the water delivery pipeline and is located downstream of the water quality online monitoring module. The flow control execution mechanism is in signal connection with the output end of the central control module. The microprocessor of the central control module is configured to perform the following operations: dynamically comparing and logically judging the real-time water quality parameter data received from the water quality online monitoring module with the corresponding water quality parameter threshold stored in the data storage unit; generating and sending a first control instruction to the flow regulation execution mechanism to keep it open or adjust to a preset replenishment flow rate only when all monitored real-time water quality parameters are within their corresponding preset safety threshold range; generating and sending a second control instruction to the flow regulation execution mechanism to prevent unqualified water from flowing into the deep water layer from the water conveying pipeline as soon as any monitored real-time water quality parameter exceeds its corresponding preset safety threshold.

[0005] Preferably, the water inlet end and the water outlet end of the water conveying pipeline are respectively provided with upper and lower infiltration openings on the surface thereof, and the flow regulation execution mechanism is a conveying mechanism, a movable sealing member and a transition sealing member between the upper and lower infiltration openings.

[0006] Preferably, the movable sealing member and the transition sealing member are both inside the water conveying pipeline, the transition sealing member is attached to the inner wall of the water conveying pipeline, and the conveying mechanism can drive the movable sealing member to move the transition sealing member up and down inside the water conveying pipeline, and the transition sealing member can block and guide the infiltration opening during movement.

[0007] Preferably, the water quality online monitoring module is installed in the flow guide channel formed in the transition sealing member, and the water quality online monitoring module is internally integrated with a sensor array including at least a turbidity sensor, a pH sensor, a total dissolved solids (TDS) sensor and a chemical oxygen demand (COD) online analyzer.

[0008] Preferably, the movable sealing member includes a guide head at the top and a movable column extending below the guide head, and the transition sealing member includes a main body annular sealing member in a ring structure with a central passage formed therein, the movable column passes through the central passage, and a gap is left between the movable column and the transition sealing member, the left gap being one of the flow channels formed in the transition sealing member, and a first sealing member is installed on the movable column, and the first sealing member sinks and docks with the central passage when the movable sealing member moves downward, thereby closing one of the flow channels.

[0009] Preferably, the movable sealing member further comprises a second sealing member, the second sealing member is in a ring structure, a transmission assembly is arranged between the first sealing member and the second sealing member to connect them, when the movable sealing member moves upward, the second sealing member is driven to sink by the transmission assembly, the upper surface of the ring-shaped sealing member is provided with a ring-shaped filter cavity corresponding to the second sealing member, when the second sealing member sinks, it is embedded in the ring-shaped filter cavity to seal the ring-shaped filter cavity, a temporary water storage groove is arranged in the ring-shaped sealing member, the top of the temporary water storage groove is communicated with the ring-shaped filter cavity, and a ring-shaped leakage seam is arranged at the bottom of the temporary water storage groove, and the two constitute another flow channel on the transition sealing member.

[0010] Preferably, the conveying mechanism comprises a motor, the output end of the motor is provided with a speed reducer, and the output end of the speed reducer is connected with a screw rod, the screw rod penetrates through the movable sealing member and constitutes a lead screw transmission structure with the movable sealing member.

[0011] Preferably, a through pipe is mounted on one side of the screw rod, the through pipe also penetrates through the movable sealing member, one end of the through pipe in the direction of the motor and a part of the movable sealing member are respectively provided with a three-way valve, and the other two interfaces of the three-way valve at one end in the direction of the motor are respectively connected with a compressor and a vacuum pump.

[0012] A sand ground underground water protection method uses a sand ground underground water protection monitoring device, and the use method is as follows: S1, the monitoring device is arranged in a sand area, a pit is first dug at a relatively low-lying place, the pit is dug to the deep water layer, a water conveying pipeline is then built, and conveying mechanisms, movable sealing members and transition sealing members and other devices in the water conveying pipeline are installed, then a surface water collecting and filtering unit is arranged, and the water conveying pipeline is filled at the same time, wherein the sand and stone filter material can be formed by sand and stone materials and soil to constitute the filtering unit; S2, the surface water collecting and filtering unit is naturally in a working state, surface water in the sand ground environment is filtered and collected, and the surface water and the shallow water flow to the water conveying pipeline; S3, the motor works to drive the movable sealing member to move the transition sealing member to the percolation opening above and completely seal the percolation opening, and the device as a whole is in a standby state; S4, the device works, the shallow water layer above the percolation opening has abundant water, the motor drives the movable sealing member to slightly sink the transition sealing member, and the water in the shallow water layer naturally flows into the water conveying pipeline from the gap at the top of the percolation opening and flows into the ring-shaped filter cavity; S5, the water quality online monitoring module in the ring-shaped filter cavity works to continuously and real-timely detect the flowing water sample, obtains multiple real-time water quality parameter data including turbidity, pH, TDS and COD, and sends the real-time water quality parameter data to the central control module. S6, the central control module calls the preset deep groundwater safety standard threshold in the internal data storage unit after receiving the real-time water quality parameter data, and compares and analyzes each item of the received real-time water quality parameter data in real time; S7, the central control module performs closed-loop feedback control based on the comparison and analysis results, specifically: 1), in S6, the analysis and detection result meets "if and only if all monitored real-time water quality parameters are within their corresponding preset safety threshold range", the central control module continues to sink through the motor control ring-shaped sealing element, expands the communication port of the upper infiltration port and the water conveying pipeline, adjusts to the preset recharge flow, and discharges into the temporary water storage tank after completing the monitoring. The water flow meeting the standard continuously flows into the temporary water storage tank and is discharged into the lower space from the edge leakage, and flows into the deep water layer; 2), in S6, the analysis and detection result meets "when any one of the monitored real-time water quality parameters exceeds its corresponding preset safety threshold", the transition sealing member closes the flow channel of the upper infiltration port flowing into the lower infiltration port, the set closing logic ① is that the conveying mechanism works to drive the movable sealing member to drive the transition sealing member to rise, and the transition sealing member seals the upper infiltration port and the water conveying pipeline through the side wall to directly close the communication; the set logic ② is that the vacuum pump connected with the three-way valve in the upper position works, the three-way valve in the movable sealing member opens the communication with the bellows, and the unqualified shallow water flowing into the temporary water storage tank is pumped and discharged to the ground surface, filtered by the ground water collection and filtration unit for secondary filtration, and the water quality online monitoring module remains in the working state. When the detection result is correct, the conveying mechanism stops working, and the monitoring device returns to the working state of 1) Preferably, after expanding the communication port of the infiltration port and the water conveying pipeline, the central control module drives the movable sealing member to rise through the motor, and the moving distance is half of the distance between the top end of the transmission sparrow and the top end of the limiting groove. At this time, the first sealing element and the second sealing element are in a non-contact state with the middle channel and the annular filter cavity, and the two flow channels opened on the transition sealing member are in an open state, which can maximize the expansion of the flow. Under the condition of always keeping real-time monitoring, the standard ground water is quickly introduced into the deep water layer to reduce evaporation.

[0013] Compared with the prior art, the present application provides a monitoring device for sand ground water protection and a use method thereof, which has the following beneficial effects: 1. By providing a water conveying pipeline communicating the shallow water layer and the deep water layer, the sand ground water is introduced into the deep water layer, the evaporation of the ground water is reduced, and the deep ground water content of the sand ground is improved; 2. The water quality online monitoring module monitors the water quality of the shallow water layer, cooperates with the flow control execution mechanism, avoids the inflow of low-quality shallow water into the deep water layer, and ensures the water quality safety of the deep water layer; 3. The driving mechanism comprises a vacuum pump and a compressor. In the water shortage season, the deep water can be pumped to meet the need of use. In the water abundant season, the shallow water can be drained into the deep water through the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a schematic diagram of the main structure of the monitoring equipment for sand ground water protection; Figure 2 Fig. 2 is a sectional view of the overall structure of the monitoring equipment for sand ground water protection; Figure 3 Fig. 3 is a schematic diagram of the internal structure of the main structure of the monitoring equipment for sand ground water protection; Figure 4 Fig. 4 is a first schematic diagram of the connection structure of the movable sealing member and the transition sealing member of the monitoring equipment for sand ground water protection; Figure 5 Fig. 5 is a second schematic diagram of the connection structure of the movable sealing member and the transition sealing member of the monitoring equipment for sand ground water protection; Figure 6 Fig. 6 is a third schematic diagram of the connection structure of the movable sealing member and the transition sealing member of the monitoring equipment for sand ground water protection; Figure 7 Fig. 7 is a schematic diagram of the transmission assembly structure of the monitoring equipment for sand ground water protection; Figure 8 Fig. 8 is a schematic diagram of the conveying mechanism structure of the monitoring equipment for sand ground water protection.

[0015] In the drawings: 1. Base; 2. Cover; 3. Water conveying pipe; 4. Cover; 5. Conveying mechanism; 51. Motor; 52. Three-way valve; 53. Screw rod; 54. Conduit; 6. Movable sealing member; 61. Guide head; 62. Movable column; 63. First sealing member; 64. Second sealing member; 65. Transmission assembly; 66. Transmission shaft; 651. Lever; 652. Positioning rod; 653. Guide cylinder; 7. Transition sealing member; 71. Annular sealing member; 72. Annular filter cavity; 73. Temporary water storage tank; 74. Middle channel; 75. Limiting groove; 8. Sandstone filter material; 9. Percolation port. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0017] As introduced in the background, the existing problems in the prior art, in order to solve the above technical problems, the present application provides a kind of sand ground water protection monitoring equipment and its using method.

[0018] In a typical embodiment of the sand ground water protection monitoring equipment and its using method of the present application, as shown in Figures 1-8 A sand ground water protection monitoring equipment includes a water pipeline 3 made of bricks and stones, a rust-proof steel pipe is installed inside the water pipeline 3 and adheres to the inner wall of the water pipeline 3, forming a sealed structure, and two filtration openings 9 are provided on the water pipeline 3, constituting the opening for the underground water to seep into the water pipeline 3. The two openings are connected by the water pipeline 3, constituting a communication passage for connecting the shallow water and the deep water. The outer part of the water pipeline 3 is tapered and has a layer of waterproof membrane laid thereon, and the sand and stone filter material 8 is filled above the waterproof membrane, constituting a surface water collection and filtration unit. The waterproof membrane is at the bottom of the upper filtration opening 9, so as to guide and transport the surface water treated by the surface water collection and filtration unit. The water pipeline 3 is internally provided with a movable sealing member 6 and a transition sealing member 7. The transition sealing member 7 adheres to the inner wall of the steel pipe, and the movable sealing member 6 and the transition sealing member 7 can move up and down inside the water pipeline 3. The transition sealing member 7 can block and guide the flow of the filtration opening 9 during movement, thereby achieving the effect of flow regulation of the upper filtration opening 9, constituting a flow regulation execution mechanism.

[0019] The transition sealing member 7 is internally provided with a water quality online monitoring module, which is installed in the flow guide channel provided on the transition sealing member 7. The water quality online monitoring module is configured to monitor the physical and chemical property parameters of the water flow in the pipeline in real time and continuously during the water transportation process. The water quality online monitoring module is internally integrated with a sensor array including at least a turbidity sensor, a pH sensor, a total dissolved solids (TDS) sensor, and a chemical oxygen demand (COD) online analyzer.

[0020] The sand ground water protection monitoring equipment further includes a central control module, which includes a microprocessor, a data storage unit, and a communication interface. The communication interface is wirelessly connected with the sensor array of the water quality online monitoring module in the transition sealing member 7 to receive the real-time water quality parameter data generated by the sensor array. The data storage unit pre-stores one or more sets of water quality parameter threshold values corresponding to the deep groundwater safety standards.

[0021] The microprocessor of the central control module is configured to perform the following operations: dynamically comparing and logically judging the real-time water quality parameter data received from the water quality online monitoring module with the corresponding water quality parameter threshold value stored in the data storage unit; generating and sending a first control instruction to the transition sealing member 7 to control the transition sealing member 7 to move downward to enlarge the communication port of the percolation port 9 with the water conveying pipeline 3 to keep it open or adjust to a preset replenishment flow rate only when all the monitored real-time water quality parameters are within their corresponding preset safety threshold range; and generating and sending a second control instruction to the transition sealing member 7 to prevent unqualified water from flowing from the shallow water layer corresponding to the upper percolation port 9 to the deep water layer corresponding to the lower percolation port 9 through the transition sealing member 7 when any of the monitored real-time water quality parameters exceeds its corresponding preset safety threshold. It should be noted that there are two working logics for preventing unqualified water from flowing from the upper percolation port 9 to the lower percolation port 9.

[0022] Further, as shown in Figure 3 and Figure 8 , the top of the water conveying pipeline 3 is provided with a base 1, and the top of the water conveying pipeline 3 is respectively covered with a gland 2 and a cover 4, and a cavity is left between the gland 2 and the cover 4. A conveying mechanism 5 is installed in the cavity, and the conveying mechanism 5 includes a motor 51. The output end of the motor 51 is provided with a speed reducer, the output end of the speed reducer is connected with a screw rod 53, the screw rod 53 penetrates through the movable sealing member 6 and constitutes a lead screw transmission structure with the movable sealing member 6, one side of the screw rod 53 is installed with a through pipe 54, the through pipe 54 also penetrates through the movable sealing member 6, one end of the through pipe 54 installed in the cavity is installed with a three-way valve 52, the other two interfaces of the three-way valve 52 are respectively connected with a compressor and a vacuum pump. Through the working of the motor 51, the screw rod 53 is driven to rotate, and cooperates with the fixed through pipe 54 to drive the movable sealing member 6 to move up and down in the water conveying pipeline 3. In addition, the compressor can convey gas to the water conveying pipeline 3 through the through pipe 54 to increase the air pressure in the water conveying pipeline 3, so as to discharge the stored water in the water conveying pipeline 3 outward through the percolation port 9, and the vacuum pump can extract the stored water in the water conveying pipeline 3 through the through pipe 54 to meet the use needs.

[0023] Further, as shown in Figures 4 to 7As shown, the movable sealing member 6 comprises a guide head 61 at the top and a movable column 62 extending below the guide head 61, and the transition sealing member 7 comprises a main body annular sealing member 71 in the form of an annular structure with a central passage 74 in the center, the movable column 62 passes through the central passage 74, and a gap is left between the movable column 62 and the transition sealing member 7, which is one of the flow channels formed on the transition sealing member 7, and the movable column 62 extends outwardly with a transmission spur 66, and the central passage 74 is provided with a limiting groove 75 engaged with the transmission spur 66, and the limiting groove 75 is longer than the transmission spur 66, so that the movable sealing member 6 will not contact the transition sealing member 7 until it moves a certain distance from top to bottom or from bottom to top, thereby driving the transition sealing member 7 to move, and when not moving, the transition sealing member 7 is tightly attached to the inner wall of the water conveying pipeline 3 to keep stable, and the elastic rubber layer provided around the outer wall of the annular sealing member 71 ensures that the transition sealing member 7 is tightly attached to the water conveying pipeline 3 while achieving the waterproof sealing effect.

[0024] Specifically, the movable sealing member 6 further comprises a first sealing member 63 and a second sealing member 64, the first sealing member 63 is arranged on the movable column 62, and when the movable sealing member 6 is initially moved downward, the first sealing member 63 contacts the transition sealing member 7 to close the central passage 74 and close one of the flow channels on the transition sealing member 7, and at the same time, the bottom of the transmission spur 66 contacts the bottom of the limiting groove 75, and when the movable sealing member 6 is further moved downward, the transmission spur 66 pushes the transition sealing member 7 to sink synchronously, and at the same time, the first sealing member 63 keeps the central passage 74 closed; The second sealing member 64 is in the form of an annular structure and is sleeved on the movable sealing member 6, and the second sealing member 64 is not directly connected to the main body of the movable sealing member 6, but is connected through a transmission assembly 65, which will be described below Figure 7The transmission assembly 65 comprises a rocker 651, a positioning rod 652 rotatably connected with the rocker 651, and a guide cylinder 653 arranged on the second sealing member 64, wherein one end of the rocker 651 is rotatably arranged on the first sealing member 63, the bottom of the positioning rod 652 is fixedly arranged on the transition sealing member 7, the guide cylinder 653 is rotatably arranged on the second sealing member 64, the end of the rocker 651 is inserted into the guide cylinder 653 and is in sliding connection with the guide cylinder 653, in the process of moving the movable sealing member 6 downward, the second sealing member 64 is lifted by the lever action, and when the movable sealing member 6 moves upward, the second sealing member 64 is pressed downward. The upper surface of the annular sealing member 71 is provided with an annular filter cavity 72 corresponding to the second sealing member 64, and when the second sealing member 64 is pressed downward, it is embedded in the annular filter cavity 72 to close the annular filter cavity 72. The inside of the annular sealing member 71 is provided with a temporary water storage tank 73, the top of the temporary water storage tank 73 is communicated with the annular filter cavity 72, and the bottom of the temporary water storage tank 73 is provided with an annular leakage seam, and the two constitute another flow channel on the transition sealing member 7. When the annular filter cavity 72 is closed, the first sealing member 63 is lifted to open the flow channel 74.

[0025] The top of the annular filter cavity 72 is communicated with the upper surface of the annular sealing member 71, the upper surface of the annular sealing member 71 is sunken towards the center and has a reverse conical structure, facilitating the flow of permeated water from the surface of the annular sealing member 71 towards the center, and the communication between the annular filter cavity 72 and the temporary water storage tank 73 is located on the outer side of the annular filter cavity 72, not the bottom. When the annular sealing member 71 does not completely block the upper seepage opening 9, the seeped groundwater in the seepage opening 9 flows from the surface of the annular sealing member 71 towards the center, at this time the surface opening of the annular filter cavity 72 is in an open state, the water flows into the annular filter cavity 72, and the surface opening of the annular filter cavity 72 is closed, and the water flows into the middle channel 74.

[0026] As shown in Figure 4 , the annular filter cavity 72 has the same surface structure as the annular sealing member 71, and also has a reverse conical structure. When the annular filter cavity 72 is in an open state, the water flowing into the annular filter cavity 72 gradually accumulates therein and overflows when it reaches the height of the edge of the annular filter cavity 72 to flow into the temporary water storage tank 73. The water quality online monitoring module mentioned in the foregoing is in the annular filter cavity 72, and the accumulated water flow provides a flow detection sample for monitoring.

[0027] It should be noted that, as shown in Figure 6 , the through pipe 54 is provided with another three-way valve 52 in the movable sealing member 6, two ports of the three-way valve 52 are communicated with two ends of the through pipe 54, and the other port is communicated with the temporary water storage tank 73 through a corrugated pipe, and the two through pipes 54 are electrically controlled.

[0028] A method for protecting groundwater in sandy land using a monitoring device for groundwater in sandy land, the use method being as follows: S1, laying the monitoring device in sandy areas, first digging a pit in a relatively low-lying place, the pit depth to the deep water layer, then building a water pipeline 3, then installing the conveying mechanism 5, the movable sealing member 6 and the transition sealing member 7 and other devices in the water pipeline 3, then setting up a surface water collection and filtration unit, and the unit completes the filling of the water pipeline 3, wherein the sand filter 8 can be formed by sand and soil on site to form a filtration unit; S2, the surface water collection and filtration unit is naturally in working condition, filtering and collecting surface water in sandy environment, and surface water and shallow water are collected to the water pipeline 3; S3, the motor 51 works to drive the movable sealing member 6 to move the transition sealing member 7 to the upper infiltration port 9 and completely block it, and the whole device is in standby state; S4, the device works, the shallow water layer where the upper infiltration port 9 is located has abundant water, the motor 51 drives the movable sealing member 6 to slightly sink the transition sealing member 7, and the shallow water naturally flows into the water pipeline 3 from the gap at the top of the infiltration port 9 and flows into the annular filter cavity 72; S5, the water quality online monitoring module in the annular filter cavity 72 works to continuously and real-timely detect the flowing water sample, obtain multiple real-time water quality parameter data including turbidity, pH, TDS and COD, and send the real-time water quality parameter data to the central control module; S6, the central control module calls the preset deep groundwater safety standard threshold in the internal data storage unit after receiving the real-time water quality parameter data, and compares and analyzes each item of real-time water quality parameter data received in real time; S7, the central control module executes closed-loop feedback control based on the comparison and analysis results, specifically: 1), in S5, when all the monitored real-time water quality parameters are within their corresponding preset safety threshold range, the central control module controls the annular sealing member 71 to continue sinking through the motor 51, expands the communication port of the upper infiltration port 9 and the water pipeline 3, adjusts to the preset recharge flow, and discharges into the temporary water storage tank 73 after completing the monitoring, the water flow meeting the standard continuously flows into the temporary water storage tank 73 and discharges from the edge of the leakage into the space below, and flows into the deep water layer; 2), S5 in the analysis of test results in accordance with the aforementioned mentioned "when any monitored real-time water quality parameters beyond its corresponding pre-set safety threshold", the transition sealing member 7 is closed above the infiltration mouth 9 into the lower infiltration mouth 9 flow channel, the set of closing logic ① for: conveying mechanism 5 work, drive the active sealing member 6 with transition sealing member 7 rising, through the side wall of the transition sealing member 7 to block the direct closing of the upper infiltration mouth 9 and water pipeline 3 communication; the set of logic ② for: in the upper three-way valve 52 connected to the vacuum pump work, in the active sealing member 6 in the three-way valve 52 opening and corrugated tube communication, will be integrated into the temporary water tank 73 in the unqualified shallow water extraction, to the surface, through the surface water collection filter unit for secondary filtration, water quality online monitoring module remains in working condition, when the test results like one, conveying mechanism 5 stop working, monitoring device to restore to one of the working state.

[0029] For S7 in 1) of the supplement: in the expansion of the infiltration mouth 9 and water pipeline 3 communication mouth after, the central control module through the motor 51 drive active sealing member 6 rises, the moving distance is the half of the interval between the top of the transmission sparrow 66 and the top of the limiting groove 75, at this time the first sealing element 63 and the second sealing element 64 and the middle channel 74 and the annular filter cavity 72 are in non-contact state, the two flow channels opened in the transition sealing member 7 are in open state, which can maximize the flow expansion, under the condition of real-time monitoring, to quickly guide the standard surface water into deep water layer, reduce evaporation.

[0030] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A monitoring device for sand ground water protection, characterized by, The application relates to a water quality monitoring and controlling system for deep groundwater recharge, comprising the following components: a surface water collecting unit configured to collect surface runoff and shallow percolation water in a sandy environment, the surface water collecting unit comprising a water inlet and a sand filter (8) and a waterproof membrane for preliminary precipitation and filtration; a water conveying pipeline (3), the water inlet end of the water conveying pipeline (3) being communicated with the water outlet of the surface water collecting unit, and the water outlet end of the water conveying pipeline (3) being communicated with a deep water layer for guiding and conveying the surface water treated by the surface water collecting unit; a water quality online monitoring module installed in the water conveying pipeline (3) and in the flow channel for guiding and conveying, the water quality online monitoring module being used for detecting the physical and chemical properties of the water flow in the water conveying pipeline (3) in real time and continuously during water conveying; a central control module, the central control module comprising a microprocessor, a data storage unit and a communication interface, the communication interface being connected with the water quality online monitoring module in wireless data communication to receive real-time water quality parameter data generated by the water quality online monitoring module, and the data storage unit pre-storing one or more groups of water quality parameter threshold values corresponding to deep groundwater safety standards; a flow control execution mechanism installed in the water conveying pipeline (3) and at a downstream position of the water quality online monitoring module, the flow control execution mechanism being connected with the output signal of the central control module; the microprocessor of the central control module is configured to perform the following operations: dynamically comparing and logically judging the real-time water quality parameter data received from the water quality online monitoring module with the corresponding water quality parameter threshold values stored in the data storage unit; when and only when all the monitored real-time water quality parameters are within the corresponding preset safety threshold value ranges, a first control instruction is generated and sent to the flow control execution mechanism to make it keep open or be adjusted to a preset recharge flow; when any one of the monitored real-time water quality parameters exceeds the corresponding preset safety threshold value, a second control instruction is immediately generated and sent to the flow control execution mechanism to prevent unqualified water from flowing into the deep water layer from the water conveying pipeline (3).

2. The monitoring device for sand ground water protection according to claim 1, characterized in that: The water inlet end and the water outlet end of the water conveying pipeline (3) are respectively provided with upper and lower infiltration openings (9) on the surface thereof, and the flow control execution mechanism is a conveying mechanism (5), a movable sealing member (6) and a transition sealing member (7) between the upper and lower infiltration openings (9).

3. The monitoring device for sand ground water protection according to claim 2, characterized in that: The movable sealing member (6) and the transition sealing member (7) are both arranged in the interior of the water conveying pipeline (3), the transition sealing member (7) is attached to the inner wall of the water conveying pipeline (3), the conveying mechanism (5) can drive the movable sealing member (6) to move the transition sealing member (7) up and down in the interior of the water conveying pipeline (3), and the transition sealing member (7) can block and guide the infiltration openings (9) during the movement.

4. The monitoring device for sand ground water protection according to claim 3, characterized in that: The water quality online monitoring module is installed in a flow guide channel formed in the transition sealing member (7), and the water quality online monitoring module is internally integrated with a sensor array comprising at least a turbidity sensor, a pH sensor, a total dissolved solids (TDS) sensor and a chemical oxygen demand (COD) online analyzer.

5. The monitoring device for sand ground water protection according to claim 3, characterized in that: The movable sealing member (6) comprises a guide head (61) at the top and a movable column (62) extending below the guide head (61), and the transition sealing member (7) comprises a main body annular seal (71) in the form of an annular structure with a central passage (74) formed in the center, the movable column (62) passes through the central passage (74), and a gap is left between the movable column (62) and the transition sealing member (7), the gap is one of the flow channels formed in the transition sealing member (7), and a first seal (63) is installed on the movable column (62), when the movable sealing member (6) moves downward, the first seal (63) sinks and is connected with the central passage (74), thereby closing one of the flow channels.

6. The monitoring device for sand ground water protection according to claim 5, characterized in that: The movable sealing member (6) further comprises a second seal (64) in the form of an annular structure, a transmission assembly (65) is arranged between the second seal (64) and the first seal (63) for connection, when the movable sealing member (6) moves upward, the second seal (64) is driven to sink by the transmission assembly (65), an annular filter cavity (72) is formed in the upper surface of the annular seal (71) and corresponds to the second seal (64), when the second seal (64) sinks, it is embedded in the annular filter cavity (72) to close the annular filter cavity (72), a temporary water storage tank (73) is formed in the inside of the annular seal (71), the top of the temporary water storage tank (73) is communicated with the annular filter cavity (72), and a ring-shaped leakage seam is formed in the bottom of the temporary water storage tank (73), thereby forming another flow channel in the transition sealing member (7).

7. The monitoring device for sand ground water protection according to claim 2, characterized in that: The conveying mechanism (5) comprises a motor (51), a speed reducer is arranged at the output end of the motor (51), a screw rod (53) is connected to the output end of the speed reducer, and the screw rod (53) passes through the movable sealing member (6) and forms a lead screw transmission structure.

8. The monitoring device for sand ground water protection according to claim 7, characterized in that: A through pipe (54) is installed on one side of the screw rod (53), the through pipe (54) also passes through the movable sealing member (6), and a three-way valve (52) is installed at one end of the through pipe (54) in the direction of the motor (51) and at a part of the movable sealing member (6), respectively.

9. A method of protecting groundwater in sandy soils, characterized by: The use method of the monitoring equipment for sand ground water protection according to any one of claims 1-8 is as follows: S1, the monitoring equipment is arranged in a sand area, a pit is first dug in a relatively low-lying place to a depth reaching a deep water layer, a water conveying pipeline (3) is then built, and then the conveying mechanism (5), the movable sealing member (6) and the transition sealing member (7) and other equipment in the water conveying pipeline (3) are installed, and then a ground water collecting and filtering unit is arranged, and the water conveying pipeline (3) is filled at the same time, wherein the sand and stone filter material (8) can be formed by using sand and stone materials and soil on site to form the filtering unit; S2, the ground water collecting and filtering unit is naturally in a working state, and the ground water in the sand environment is filtered and collected, and the ground water and the shallow water are collected to the water conveying pipeline (3). S3, the motor (51) works, drives the movable sealing member (6) to drive the transition sealing member (7) to move to the upper percolation opening (9) and completely seal it, and the whole device is in standby state; S4, the device works, the shallow water layer where the upper percolation opening (9) is located has sufficient water, the motor (51) drives the movable sealing member (6) to drive the transition sealing member (7) to sink slightly, and the shallow water layer is naturally filled into the water conveying pipeline (3) from the top gap of the percolation opening (9), and is collected into the annular filter cavity (72); S5, the water quality online monitoring module in the annular filter cavity (72) works to continuously detect the flowing water sample in real time, obtains a plurality of real-time water quality parameter data including turbidity, pH, TDS and COD, and sends the real-time water quality parameter data to the central control module; S6, after the central control module receives the real-time water quality parameter data, it calls the preset deep groundwater safety standard threshold in the internal data storage unit to compare and analyze each item of real-time water quality parameter data received; S7, the central control module executes closed-loop feedback control based on the comparison and analysis results, specifically: 1) in S6, the analysis and detection results meet "if and only if all monitored real-time water quality parameters are within their corresponding preset safety threshold range", the central control module controls the annular sealing member (71) to continue sinking through the motor (51), expands the communication port of the upper percolation opening (9) and the water conveying pipeline (3), adjusts to the preset recharge flow, and discharges into the temporary water storage tank (73) after completing the monitoring, the water flow meeting the standard continuously flows into the temporary water storage tank (73) and is discharged into the lower space from the edge leakage, and is collected into the deep water layer; 2) in S6, the analysis and detection results meet "when any one of the monitored real-time water quality parameters exceeds its corresponding preset safety threshold", the transition sealing member (7) closes the flow channel of the upper percolation opening (9) into the lower percolation opening (9), the set closing logic ① is that the conveying mechanism (5) works to drive the movable sealing member (6) to drive the transition sealing member (7) to rise, and the upper percolation opening (9) is directly closed by the side wall of the transition sealing member (7) to close the communication between the water conveying pipeline (3); the set logic ② is that the vacuum pump connected with the three-way valve (52) in the upper position works, the three-way valve (52) in the movable sealing member (6) is opened to communicate with the bellows, the unqualified shallow water collected into the temporary water storage tank (73) is pumped and discharged to the ground surface, is filtered by the surface water collection and filtration unit for secondary filtration, and the water quality online monitoring module remains in working state. When the detection result is correct, the conveying mechanism (5) stops working, and the monitoring device returns to the working state of 1).

10. A method of protecting sand ground water according to claim 9, characterized in that: After expanding the communication port of the infiltration port (9) and the water pipeline (3), the central control module drives the movable sealing member (6) to rise through the motor (51), and the moving distance is half of the distance between the top of the transmission sparrow (66) and the top of the limiting groove (75). At this time, the first sealing member (63) and the second sealing member (64) are in a non-contact state with the middle channel (74) and the annular filter cavity (72), and the two flow channels opened on the transition sealing member (7) are in an open state, which can maximize the flow. Under the condition of real-time monitoring at all times, the standard surface water is quickly introduced into the deep water layer to reduce evaporation.

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