Field groundwater connectivity investigation testing device

Abstract

The invention relates to the technical field of groundwater detection, in particular to a field groundwater connectivity investigation and test device which comprises a throwing barrel and a detection barrel, drill bits are fixedly connected to the bottoms of the throwing barrel and the detection barrel, driving assemblies are fixedly connected to the tops of the throwing barrel and the detection barrel, and a water injection assembly is arranged on the throwing barrel. A detection groove is formed in the bottom of the detection barrel, two partition plates are arranged in the detection groove, a water passing gap is formed between the two partition plates, a rotating shaft is arranged between the two partition plates, a plurality of rotating blades are fixedly connected to the side wall of the rotating shaft, detection assemblies are arranged on the rotating blades, and the detection assemblies are in signal connection with a control system; according to the underground water connectivity detection device, the connectivity of underground water is detected by designing and using a water injection method, the circulation area of the underground water is intelligently and dynamically adjusted according to the actual flowing condition of the underground water, the accuracy of underground water connectivity detection is improved, and the green and environment-friendly detection process is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater detection, and particularly to a field groundwater connectivity investigation and testing device. Background Art

[0002] Groundwater is the water resource stored in the pores and fissures of rock and soil at a certain depth below the ground surface, which is of great significance to human life and production. Especially in areas where surface water resources are scarce, groundwater is often the only sustainable water source. Therefore, conducting groundwater connectivity tests and mastering hydrogeological parameters such as groundwater connectivity, flow velocity, and flow direction are crucial for the rational development, utilization, and protection of groundwater resources. Existing groundwater connectivity detection methods vary, but the preliminary preparations generally include the investigation of the detection area, the selection of the test area, and the layout of test wells and observation wells, which involve the layout marking and drilling construction of test wells and observation wells, and drilling the observation device and test device into the ground to cooperate in detecting the groundwater connectivity.

[0003] In the existing groundwater connectivity detection methods, the bubble detection method (by foaming at the test end, using groundwater to drive the bubbles to flow, and monitoring the water pressure change of the groundwater with entrained bubbles through the detection well to judge the groundwater connectivity) can detect a relatively limited distance of groundwater. When the groundwater flow path is long or the terrain is complex, the bubbles may not be able to spread smoothly to the detection well, resulting in an inability to accurately judge the groundwater connectivity. For the conventional method of injecting tracers (by injecting chemical substances containing tracers at the test point, and then judging the groundwater connectivity by analyzing the concentration change of the tracers in the groundwater at the detection point), the tracers generally contain a small amount of toxicity. These toxic substances may diffuse with the groundwater flow after being injected, having an adverse impact on the groundwater ecological environment. Especially in some areas with high water quality requirements, using the conventional method of injecting tracers may cause serious environmental problems.

[0004] Therefore, it is necessary to propose a field groundwater connectivity investigation and testing device that can adapt to the long groundwater flow path and complex terrain, reduce the probability of polluting the groundwater ecological environment, and improve the accuracy of groundwater connectivity detection. Summary of the Invention

[0005] To solve the above problems, the present invention provides a field groundwater connectivity investigation and testing device, which detects the groundwater connectivity by designing and using the water injection method, and intelligently dynamically balances the flow potential energy of groundwater and intelligently adjusts the flow area of groundwater according to the actual flow situation of groundwater, improves the accuracy of groundwater connectivity detection, and realizes a green and environmentally friendly detection process.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A field groundwater connectivity investigation and testing device, including a delivery cylinder and a detection cylinder, drill bits are fixedly connected to the bottoms of the delivery cylinder and the detection cylinder, and drive components for providing driving force for drilling are fixedly connected to the tops of the delivery cylinder and the detection cylinder. An injection component for injecting detection water is provided on the delivery cylinder;

[0007] A detection groove is formed at the bottom of the detection cylinder. Two vertical partition plates are arranged in the detection groove. There is a water passing gap between the two partition plates. The top and bottom ends of the partition plates are respectively fixedly connected to the inner top wall and the inner bottom wall of the detection groove. A rotating shaft is arranged between the two partition plates. Both ends of the rotating shaft are rotatably connected to the partition plates on both sides. A plurality of rotating blades are welded to the side wall of the rotating shaft along its circumference. A detection component for intelligently detecting fluidity information is arranged on one of the rotating blades. The detection component is signal-connected to a control system;

[0008] A balance component for dynamically balancing the potential energy of groundwater flow is also sleeved on the rotating shaft. Shut-off components are arranged on the partition plates. When the detection water is injected, the shut-off components adjust the flowing area of groundwater synchronously according to the flow rate of groundwater.

[0009] The technical principle of the above solution is as follows: The tester first determines the position of the underground water body, and then drills the delivery cylinder and the detection cylinder into the soil body to an appropriate depth respectively. The detection water is injected into the groundwater test point through the injection component. After the detection water is mixed with the groundwater, its overall flow rate increases, resulting in an increase in the potential energy when the water flows through the water passing gap. Through the design of the rotating blades and the detection component, the change in the potential energy of groundwater flow is captured; through the design of the balance component and the shut-off component, the rotational potential energy of a plurality of rotating blades is utilized to dynamically adjust the size of the groundwater flowing area.

[0010] The following beneficial effects are achieved by adopting the above solution:

[0011] 1. In this solution, by injecting detection water from the test point and then using intelligent components at the detection point to detect the change in groundwater flow rate caused by the addition of detection water, low-pollution and high-efficiency groundwater connectivity detection is realized. Due to the fluidity of water, the underground water flow path that can be detected by this method is longer than that of the bubble detection method, improving the accuracy and reliability of groundwater connectivity detection.

[0012] 2. In this solution, the size of the water flow potential energy is detected by the rotation of the rotating blades, which is simpler and more intuitive compared with the traditional method of detecting the change in water pressure or the flow rate and flow of water by designing complex sensors. The rotation of the rotating blades directly reflects the change in the water flow potential energy, making the detection process more convenient and reducing the detection cost at the same time.

[0013] 3. In this solution, a balance component is designed to synchronize the change in the potential energy of groundwater flow. This component can intelligently adjust the flow area according to the actual groundwater flow conditions, thereby achieving automatic adjustment of groundwater flow rate. It not only improves the intelligent level of detection but also effectively reduces the impact on the ecological environment of groundwater below the detection point, which is beneficial to the sustainable development of protecting groundwater resources and the ecological environment.

[0014] Furthermore, the water injection component includes a water passing groove opened in the delivery cylinder body. The top of the water passing groove is connected to a water inlet pipe, and the bottom end of the water passing groove is connected to a water injection port opened on the side wall of the delivery cylinder body.

[0015] Beneficial effects: The detection water is injected into the water passing groove through the water inlet pipe, ensuring that the detection water can quickly and evenly enter the interior of the delivery cylinder body. The design of the water passing groove enables the detection water to slow down the flow rate during the inflow process, avoiding direct impact on the bottom or side wall of the delivery cylinder body, thereby reducing the energy loss of the water flow and possible equipment damage. The water injection port is opened on the side wall of the delivery cylinder body, enabling the detection water to be evenly distributed around the delivery cylinder body, improving the water injection efficiency and the uniformity of groundwater mixing.

[0016] Furthermore, a protective cylinder shell is slidably connected to the outer side wall of the detection cylinder body.

[0017] Beneficial effects: During the process of the detection cylinder body drilling into the ground, the protective cylinder shell can wrap the detection groove and its internal mechanisms, effectively preventing impurities such as soil and sand from entering the detection groove, avoiding interference and damage to the detection equipment by impurities, and thus ensuring the accuracy and reliability of subsequent detection work. In addition, the presence of the protective cylinder shell can also enhance the structural strength of the detection cylinder body, enabling it to better cope with various complex geological conditions that may be encountered during the drilling process, such as hard rocks and soft soils, improving the durability and service life of the equipment, and reducing the risk of work interruption caused by equipment damage during the detection process.

[0018] Furthermore, the detection component includes a corner sensor fixedly connected to one of the rotating blades.

[0019] Beneficial effects: The design of the corner sensor can accurately measure the rotation angle of the rotating blade, directly reflecting the change in water flow potential energy. Through the detection of the corner sensor, the change information of groundwater flow rate can be accurately obtained, and then the connectivity of groundwater can be judged. Compared with traditional methods, this design provides more accurate and reliable detection results.

[0020] Furthermore, the balance component includes an anti-rust cylinder fixedly connected to the rotating shaft. A tape spring is provided inside the anti-rust cylinder. One end of the tape spring is fixedly connected to the rotating shaft, and the other end of the tape spring is fixedly connected to the inner wall of the anti-rust cylinder.

[0021] Beneficial effects: As an elastic element, the ruler spring can automatically adjust its telescopic length according to the change of the potential energy of groundwater flow, so as to achieve the balancing effect on the rotating shaft and the rotating blade. When the water flow potential energy increases, the ruler spring will elongate accordingly to offset part of the impact force of the water flow on the rotating blade and keep the rotating shaft running smoothly. On the contrary, when the water flow potential energy decreases, the ruler spring will shorten to ensure that the rotating blade can rotate smoothly in response to the change of the water flow. In addition, the design of the anti-rust cylinder effectively protects the ruler spring from being eroded by corrosive substances in the groundwater and extends the service life of the ruler spring.

[0022] Furthermore, the intercepting components all include telescopic grooves opened in the partition plates. The telescopic grooves are all open on the sides of the two partition plates away from each other. Both ends of the rotating shaft penetrate through the side walls of the partition plates and extend into the corresponding telescopic grooves. Threaded rods fixedly connected to one end of the corresponding rotating shaft are provided in the telescopic grooves. Hollow telescopic plates are slidably fitted in the telescopic grooves. Threaded holes corresponding to the threaded rods are opened on the telescopic plates. The telescopic plates are all in threaded fit with the corresponding threaded rods through the threaded holes.

[0023] Beneficial effects: By adjusting the position of the telescopic plate in the telescopic groove, the influence on the groundwater flow area can be realized, so as to intelligently adjust the groundwater flow rate. When it is necessary to increase the groundwater flow rate, the threaded hole on the telescopic plate can be loosened, so that the telescopic plate moves away from the rotating shaft along the threaded rod, thereby increasing the rotation range of the rotating blade and allowing more water flow to pass through. On the contrary, when it is necessary to reduce the groundwater flow rate, the threaded hole on the telescopic plate can be tightened, so that the telescopic plate moves closer to the rotating shaft along the threaded rod, thereby restricting the rotation range of the rotating blade and reducing the water flow through amount.

[0024] Furthermore, pressure sensors are symmetrically and fixedly connected to the outer side walls of the drill bits. The pressure sensors are all in signal connection with the control system.

[0025] Beneficial effects: The pressure sensors can real-time monitor the force conditions of the drill bits during the drilling process, including the axial pressure and radial pressure of the drill bits, etc. The data is transmitted to the control system through signals, and the control system can perform real-time analysis on the data to understand the depth of the drill bits drilling into the soil.

[0026] Furthermore, the rotating blades are all of arc-shaped structures, and the arc tops of the arc-shaped structures are all located on the water-receiving side of the rotating blades.

[0027] Beneficial effects: The rotating blades of the arc-shaped structure can better conform to the flow direction of the water flow and reduce the resistance of the water flow on the surface of the rotating blades. When the water flow impacts the rotating blades, the arc-shaped structure can guide the water flow to flow along the curved surface of the rotating blades, making the water flow rotate along the arc-shaped structure, slowing down its flow rate, and reducing the impact on the ecological environment of the basin below the detection point due to the participation of the detection water.

[0028] Furthermore, a water extraction pipe is embedded in the side wall of the delivery cylinder. The top of the water extraction pipe is connected to a water pump, and the water extraction pipe is connected to a water inspection pipe through the water pump.

[0029] Beneficial effects: This design enables the inspectors to sample and detect the groundwater in real time and obtain relevant information about the groundwater in a timely manner. This helps the inspectors adjust the composition or content of the detected water according to the properties of the groundwater in the target detection area, reducing the impact of the detection on the groundwater body ecosystem due to water quality differences.

[0030] Furthermore, the control system includes a pressure acquisition module, a pressure analysis module, a rotation angle acquisition module, and a connectivity analysis module;

[0031] The pressure acquisition module is used to acquire the pressure signals transmitted by a number of pressure sensors during the process of the drill bit drilling into the soil body, convert the pressure signals into pressure data, and transmit the pressure data to the pressure analysis module;

[0032] The pressure analysis module is used to receive the pressure data transmitted by the pressure acquisition module, generate the change of the pressure data on both sides of the drill bit during the drilling process in combination with the pressure data, judge the soil layer reached by the drill bit according to the change trend of the pressure data, and then judge the flow direction of the groundwater by comparing the change of the pressure data of the pressure sensors on both sides;

[0033] The rotation angle acquisition module is used to acquire the rotation angle signals transmitted by the rotation angle sensors and transmit the rotation angle signals to the connectivity analysis module;

[0034] The connectivity analysis module is used to receive the rotation angle signals of the rotation angle acquisition module, record the time interval of the rotation angle signals, and judge the groundwater connectivity of the target detection area.

[0035] Beneficial effects: The design of the control system makes the whole test device more intelligent and automated. The inspectors can achieve a comprehensive investigation and analysis of the groundwater connectivity through simple operations, reducing the work intensity and operation difficulty.

[0036] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the field groundwater connectivity investigation and test device of the present invention;

[0038] Figure 2 It is an axonometric sectional view of the delivery cylinder in an embodiment of the field groundwater connectivity investigation and test device of the present invention;

[0039] Figure 3It is an axonometric sectional view of the detection cylinder in the embodiment of the field groundwater connectivity investigation and testing device of the present invention;

[0040] Figure 4 It is a schematic diagram of the rotating blade in the embodiment of the field groundwater connectivity investigation and testing device of the present invention;

[0041] Figure 5 It is a schematic diagram of the drilling stage in the embodiment of the field groundwater connectivity investigation and testing device of the present invention.

[0042] The reference numerals in the accompanying drawings of the specification include: 1, delivery cylinder; 2, detection cylinder; 3, drill bit; 4, detection groove; 5, partition board; 6, water passing gap; 7, rotating shaft; 8, rotating blade; 9, water passing trough; 10, water inlet pipe; 11, water injection port; 12, protective cylinder shell; 13, corner sensor; 14, rust-proof cylinder; 15, ruler spring; 16, telescopic groove; 17, threaded rod; 18, telescopic plate; 19, threaded hole; 20, pressure sensor; 21, water extraction pipe. Detailed implementation manners

[0043] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] The following will be further described in detail through specific implementation manners:

[0047] Example 1:

[0048] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 5 : A field groundwater connectivity investigation and testing device includes a placement cylinder 1, a detection cylinder 2, and a control system for intelligent detection. Drill bits 3 are welded to the bottoms of both the placement cylinder 1 and the detection cylinder 2. Drilling motors are coaxially and fixedly connected to the tops of both the placement cylinder 1 and the detection cylinder 2 through couplings. After the detection personnel determine the investigation target and the detection test area, when the underground water body is detected by the resistivity method in the test area, the placement cylinder 1 and the detection cylinder 2 are respectively drilled into the soil according to the test points and the detection points.

[0049] To simplify the drilling operation, pressure sensors 20 are symmetrically and fixedly connected to the outer side walls of the drill bits 3 through screws. The pressure sensors 20 are all signal-connected to the control system. Taking the two pressure sensors 20 on the drill bit 3 at the bottom of the placement cylinder 1 as an example, protective shells welded to the drill bits 3 are provided outside the pressure sensors 20. The protective shells wrap the corresponding pressure sensors 20. Since the drill bit 3 rotates at a high speed when drilling into the ground surface, the exposed pressure sensors 20 may be damaged during the process. The design of the protective shell effectively isolates the direct mechanical impact, friction, and vibration generated when the drill bit 3 rotates and drills into the ground surface, thereby reducing the risk of sensor damage and ensuring that the sensor can maintain its sensitivity and accuracy even under extreme conditions;

[0050] For the detection of the pressure sensor 20, as shown in Figure 5 , the process of drilling from the soil into the groundwater is described by dividing it into initial soil drilling, drilling into the groundwater layer, and secondary soil drilling. During the initial soil drilling, the pressure sensor 20 will detect slowly increasing pressure data. When the drill bit 3 drills into the groundwater layer, the pressure data collected by the pressure sensor 20 will suddenly decrease. At this time, the pressure sensor 20 shows the pressure signal of the water flow impacting the drill bit 3. When the secondary soil drilling occurs, that is, when drilling into the soil at the bottom of the groundwater through the groundwater flow layer again, the pressure sensor 20 re-detects slowly increasing pressure data. The pressure signal detected by the pressure sensor 20 is transmitted to the control system for conversion monitoring. The detection personnel can judge and control the drill bit 3 to reach an appropriate drilling depth, avoiding water resource damage or drilling failure caused by excessive drilling, and achieving accurate connectivity detection drilling;

[0051] In addition, when the drill bit 3 drills into the underground layer, the symmetrically designed pressure sensors 20 can calculate and determine the water flow direction by detecting the changes in the pressure data on both sides when the drill bit 3 contacts the underground water flow. Due to the impact of the water flow on the drill bit 3, there will be differences in the pressure signals received by the sensors on both sides. By comparing these differences, the water flow direction and intensity can be inferred, which is beneficial to verifying the detection points through the boreholes at the test points and assisting in improving the accuracy of underground water connectivity detection.

[0052] This solution uses the water injection method to detect the connectivity of underground water. A water passing groove 9 is provided in the designed placement cylinder 1. The top of the water passing groove 9 is connected to a water inlet pipe 10, and the bottom end of the water passing groove 9 is connected to a water injection port 11 opened on the side wall of the placement cylinder 1. After the detection personnel drill and arrange the placement cylinder 1 and the detection cylinder 2 respectively, the detection personnel inject the detection water through the water inlet pipe 10. The detection water flows out from the water injection port 11 through the water passing groove 9 and merges into the underground water.

[0053] Regarding the detection of the detection points, a detection groove 4 is provided at a position near the drill bit 3 at the bottom of the designed detection cylinder 2. In order to prevent impurities such as soil from entering the detection groove 4 during the drilling process and affecting the detection results, the outer side wall of the detection cylinder 2 is slidably connected to a protective cylinder shell 12 through a slider and chute mechanism. The design of the protective cylinder shell 12 can tightly wrap the detection groove 4 when the detection cylinder 2 drills into the ground, playing an effective protective role; when the detection cylinder 2 successfully drills to the predetermined depth of the underground water layer, the bottom of the detection groove 4 will be flush with the bottom of the underground water. At this time, the detection personnel can pull up the protective cylinder shell 12 to completely expose the detection groove 4, so as to carry out subsequent detection work.

[0054] There are two vertical partitions 5 in the detection groove 4. There is a water passing gap 6 between the two partitions 5. The top and bottom ends of the partitions 5 are respectively welded to the inner top wall and inner bottom wall of the detection groove 4. There is a rotating shaft 7 between the two partitions 5. Both ends of the rotating shaft 7 are rotatably connected to the partitions 5 on both sides through bearings. A number of rotating blades 8 are welded to the side wall of the rotating shaft 7 along its circumference. An anti-rust cylinder 14 welded to the corresponding partition 5 is also sleeved on the rotating shaft 7. A ruler spring 15 is arranged in each anti-rust cylinder 14. One end of the ruler spring 15 is fixedly connected to the rotating shaft 7 by screws, and the other end of the ruler spring 15 is fixedly connected to the inner wall of the anti-rust cylinder 14 by screws. When underground water flows through the water passing gap 6 between the two partitions 5, the underground water impacts a number of rotating blades 8, and the flow potential energy of the underground water is converted into the rotational energy of the rotating blades 8. The design of the ruler spring 15 can produce corresponding elastic deformation when the rotating blades 8 are impacted by water, thus playing a role in balancing the water flow impact force. Since the flow of underground water is relatively constant without human influence, that is, when the detection personnel pull up the protective cylinder shell 12, a number of rotating blades 8 will rotate a certain angle under the impact of underground water and then remain stable in this dynamic equilibrium state. However, when the detection water injected from the injection cylinder body 1 follows the underground water and flows to the partition 5, it will increase the overall flow rate of the underground water. When the increased-flow underground water passes through the water passing gap 6, its flow potential energy will also increase accordingly, thus breaking the previous balance state between the flow potential energy and the elastic potential energy of the ruler spring 15, and the rotating blades 8 start to rotate again.

[0055] Using this mechanism, a rotation angle sensor 13 is fixedly connected to one of the rotating blades 8 by screws. The rotation angle sensor 13 is signal-connected to the control system. The task of this rotation angle sensor 13 is to accurately detect the rotation angle of this rotating blade 8 after maintaining dynamic equilibrium. In the normal state, when the protective cylinder shell 12 is pulled up and the rotating blades 8 are impacted by the constantly flowing underground water, they will rotate to a specific equilibrium angle and remain stable at this position. At this time, the rotation angle sensor 13 will record this equilibrium angle and transmit it to the control system as reference data. Once the rotation angle sensor 13 detects that after the rotating blades 8 reach the equilibrium state and remain stable for a period of time, their rotation angles have changed significantly, this means there is connectivity between the underground water at the detection point and the test point. Because only when the flow rate of the underground water changes, that is, when a new water source (the detection water injected from the injection cylinder body 1) is added, will the original flow equilibrium be broken, resulting in the rotating blades 8 rotating again. On the contrary, if the rotation angle sensor 13 does not detect subsequent rotation of the rotating blades 8 for a long time, then it can be preliminarily judged that the underground water between the detection point and the test point is not connected. Because without the addition of a new water source, the flow state of the underground water remains stable, and the rotating blades 8 cannot change significantly at the equilibrium angle.

[0056] Specifically, considering that the change in groundwater flow will also have an impact on the groundwater ecosystem, several rotating blades 8 are used to utilize the rotational potential energy transmitted through the rotating shaft 7. Two partition plates 5 are designed with telescopic grooves 16 opened therein. The telescopic grooves 16 are all opened on the side of the two partition plates 5 away from each other. Both ends of the rotating shaft 7 penetrate through the side walls of the partition plates 5 and extend into the corresponding telescopic grooves 16. Threaded rods 17 welded to the rotating shaft 7 are provided in the telescopic grooves 16. Hollow telescopic plates 18 are slidably fitted in the telescopic grooves 16. Threaded holes 19 corresponding to the positions of the threaded rods 17 are opened on the telescopic plates 18. The telescopic plates 18 are threadedly fitted with the corresponding threaded rods 17 through the threaded holes 19. In the actual detection process of this mechanism design, when the groundwater is mixed with the detection water injected from the injection cylinder 1, the overall flow rate will increase, resulting in an increase in the potential energy when the water flows through the water passing gap 6. At this time, the rotating blades 8 will rotate again, and the generated rotational potential energy will be transmitted to the threaded rods 17 at both ends through the rotating shaft 7, driving the threaded rods 17 to start rotating. Since a threaded fit is achieved between the telescopic plates 18 and the threaded rods 17, the rotational potential energy of the threaded rods 17 will be further transmitted to the telescopic plates 18. However, since the telescopic plates 18 are rotationally limited by the inner walls of the partition plates 5, they cannot rotate with the threaded rods 17, but can only slide along the trajectory of the telescopic grooves 16, pushing the telescopic plates 18 to extend out of the interior of the partition plates 5 in the direction away from each other. The extension of the telescopic plates 18 will gradually reduce the groundwater flow area, thereby reducing the groundwater flow rate passing through the detection point, and slowing down the increase in groundwater flow rate caused by the injection of detection water; through the design of this mechanism, not only can the accurate detection of groundwater connectivity be achieved, but also the groundwater flow rate after passing through the detection point can be intelligently adjusted during the detection process, minimizing the impact on the groundwater body ecosystem downstream of the detection point to the greatest extent.

[0057] Another advantage is that since the reduction of this flow area (the elongation of the two telescopic plates 18) is synchronized with the increased flow potential energy of the groundwater (the impact of the mixed water body of groundwater and detection water on several rotating blades 8), that is, the extension amount of the telescopic plates 18 is not arbitrarily set, but is closely related to the flow potential energy of the groundwater. When the flow potential energy increases, the rotation angle and speed of the rotating blades 8 will also increase accordingly, and then a greater driving force will be transmitted to the telescopic plates 18 through the rotating shaft 7 and the threaded rods 17, and the telescopic plates 18 will extend a greater distance, thereby reducing the groundwater flow area to a greater extent and being able to intelligently adjust the flow area according to the actual groundwater flow situation. When the groundwater flow rate increases, the reduction of the flow area can slow down the growth rate of the flow rate, thus avoiding excessive impact on the downstream groundwater ecosystem. When the groundwater flow rate is stable or decreases, the flow area will correspondingly remain or increase to ensure the normal flow of groundwater.

[0058] Embodiment 2:

[0059] As shown in the appendixFigure 2 As shown, the difference from Embodiment 1 is that for the detection water, a water extraction pipe 21 is embedded in the side wall of the dosing cylinder 1. The top of the water extraction pipe 21 is connected to a water pump, and the water extraction pipe 21 is also connected to a detection water pipe through the water pump. Before injecting the detection water, the tester drives the water pump to extract groundwater samples and conducts detection tests on the groundwater, analyzes information such as the composition, pH value, and trace element content of the groundwater in this area. Based on this, the detection water is adjusted. Because if the distance between the dosing point and the detection point for groundwater connectivity detection is too long, the injected water volume will also increase correspondingly, and the input of a large amount of detection water may also damage the ecological environment of the groundwater. By designing to extract groundwater samples for detection tests and adjusting the composition and content of the detection water, the ecological damage of the detection water to the groundwater can be effectively reduced.

[0060] Embodiment 3:

[0061] As shown in the appendix Figure 4 As shown, the difference from Embodiment 2 is that the rotating blades 8 are all arc-shaped structures, and the arc tops of the arc-shaped structures are all located on the water-receiving side of the rotating blades 8. The design of this arc-shaped structure aims to effectively slow down the flow velocity of the groundwater when flowing through by optimizing the physical form. When the groundwater encounters the rotating blades 8 with the arc tops facing the water-receiving side, the water flow is forced to flow along the arc surface, and this process of changing the direction naturally slows down the water flow velocity. At the same time, as the water flow travels along the arc-shaped path, the flow area between the rotating blades 8 gradually decreases accordingly, forming a dual-action mechanism. The reduction of the flow area further increases the resistance of the water flow when passing through the detection point, complementing the effect of slowing down the flow velocity, and jointly acting to reduce the groundwater flow passing through this detection point. It improves the accuracy of hydrological monitoring and is also helpful for more detailed observation and research on the groundwater dynamics.

[0062] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A field groundwater connectivity investigation and testing device, comprising a launch cylinder (1) and a detection cylinder (2), the bottoms of the launch cylinder (1) and the detection cylinder (2) are fixedly connected with a drill bit (3), and the tops of the launch cylinder (1) and the detection cylinder (2) are fixedly connected with a driving assembly for providing a drilling driving force, characterized in that: A water injection assembly for injecting test water is provided on the delivery cylinder (1); A detection groove (4) is provided at the bottom of the detection cylinder (2), two vertical partitions (5) are provided in the detection groove (4), a water gap (6) is provided between the two partitions (5), the top and bottom ends of the partitions (5) are respectively fixedly connected to the inner top wall and the inner bottom wall of the detection groove (4), a rotating shaft (7) is provided between the two partitions (5), both ends of the rotating shaft (7) are rotatably connected to the partitions (5) on both sides, a plurality of rotating blades (8) are welded to the side wall of the rotating shaft (7) along its circumference, one of the rotating blades (8) is provided with a detection component for intelligently detecting the flowability information, and the detection component signal is connected to the control system; The rotating shaft (7) is also provided with a balancing component for dynamically balancing the potential energy of groundwater flow, and the partitions (5) are provided with interception components. When the test water is injected, the interception components adjust the flow area of ​​the groundwater in sync with the flow rate of the groundwater.

2. The field groundwater connectivity investigation and testing device according to claim 1 is characterized in that: The water injection assembly comprises a water trough (9) disposed in the delivery cylinder (1), the top of the water trough (9) being connected to a water inlet pipe (10), and the bottom of the water trough (9) being connected to a water injection port (11) disposed on the side wall of the delivery cylinder (1).

3. The field groundwater connectivity investigation and testing device according to claim 2, characterized in that: The outer side wall of the detection cylinder (2) is slidably connected with a protective cylinder shell (12).

4. The field groundwater connectivity investigation and testing device according to claim 3 is characterized in that: The detection component comprises a rotation angle sensor (13) fixedly connected to one of the rotating blades (8).

5. The field groundwater connectivity investigation and testing device according to claim 4, characterized in that: The balancing assembly comprises an anti-rust cylinder (14) fixedly connected to the rotating shaft (7), a ruler spring (15) is arranged in the anti-rust cylinder (14), one end of the ruler spring (15) is fixedly connected to the rotating shaft (7), and the other end of the ruler spring (15) is fixedly connected to the inner wall of the anti-rust cylinder (14).

6. The field groundwater connectivity investigation and testing device according to claim 5, characterized in that: The intercepting components all include telescopic grooves (16) provided in the partitions (5), the telescopic grooves (16) all open on the side of the two partitions (5) away from each other, both ends of the rotating shaft (7) penetrate the side wall of the partition (5) and extend into the corresponding telescopic grooves (16), a threaded rod (17) fixedly connected to one end of the corresponding rotating shaft (7) is provided in the telescopic grooves (16), a hollow telescopic plate (18) is slidably matched in the telescopic grooves (16), a threaded hole (19) corresponding to the threaded rod (17) is provided on the telescopic plate (18), and the telescopic plate (18) is threadedly matched with the corresponding threaded rod (17) through the threaded hole (19).

7. The field groundwater connectivity investigation and testing device according to claim 6, characterized in that: The outer side walls of the drill bit (3) are symmetrically fixedly connected with pressure sensors (20), and the pressure sensors (20) are connected to the control system signal.

8. The field groundwater connectivity investigation and testing device according to claim 7, characterized in that: The rotor blades (8) are all arc-shaped structures, and the arc tops of the arc-shaped structures are all located on the backwater side of the rotor blades (8).

9. The field groundwater connectivity investigation and testing device according to claim 8, characterized in that: A water pumping pipe (21) is embedded in the side wall of the delivery cylinder (1), the top of the water pumping pipe (21) is connected to a water pump, and the water pumping pipe (21) is connected to a water inspection pipe through the water pump.

10. The field groundwater connectivity investigation and testing device according to claim 9, characterized in that: The control system includes a pressure acquisition module, a pressure analysis module, a rotation angle acquisition module and a connectivity analysis module; A pressure acquisition module, used for acquiring pressure signals transmitted by a plurality of pressure sensors (20) when the drill bit (3) is drilling into the soil, converting the pressure signals into pressure data, and transmitting the pressure data to a pressure analysis module; The pressure analysis module is used to receive the pressure data transmitted by the pressure acquisition module, generate pressure data changes on both sides of the drill bit (3) during the drilling process in combination with the pressure data, determine the soil layer reached by the drill bit (3) according to the change trend of the pressure data, and then determine the flow direction of the groundwater by comparing the pressure data changes of the pressure sensors (20) on both sides; A rotation angle acquisition module, used for acquiring the rotation angle signal transmitted by the rotation angle sensor (13), and transmitting the rotation angle signal to the connectivity analysis module; The connectivity analysis module is used to receive the angle signal from the angle acquisition module, record the time interval of the angle signal, and determine the groundwater connectivity in the target detection area.

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