Deep water source detection device for hydrological exploration

Abstract

The invention relates to the technical field of water source sampling and detection, and discloses a deep water source detection device for hydrological exploration, which comprises a sampling barrel body, which is of a three-layer concentric cylinder structure and sequentially comprises a flow guide barrel, a compensation barrel and a protection barrel from inside to outside, a water sample flow channel is formed in an inner cavity of the flow guide barrel, and an annular compensation cavity is formed between the compensation barrel and the flow guide barrel; the inner wall of the guide cylinder is provided with a spiral guide structure; the pressure regulator comprises a piston assembly and a buffer unit, is arranged in the annular compensation cavity, and is communicated with the inner cavity of the guide cylinder through the balance hole; the pressure compensation device comprises an air source, a pressure regulating valve and a pressure sensor group which are connected with an annular compensation cavity; the flow field stabilizing device comprises a differential pressure valve and a pressure reducing valve group; the flow field disturbance in the pressure compensation process is reduced, the pressure compensation precision is improved, the radial permeation caused by the pressure gradient is reduced through the stable pressure environment, and the anti-mixing effect of the spiral flow channel is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water source sampling and detection, and more particularly to a deep water source detection device for hydrological exploration. BACKGROUND

[0002] In the hydrological exploration of deep multilayer aquifers, the sampling device needs to pass through multiple aquifers of different depths to reach the target deep layer for water sample collection. The traditional deep water sampling device faces serious technical problems in practical application.

[0003] Firstly, during the pumping process, due to the pressure gradient difference between the aquifers, when the sampling device passes through multiple aquifers, the water molecules of adjacent aquifers will enter the target sampling area through the device gap or penetration due to the pressure difference. This interlayer water quality mixing phenomenon will cause the collected water sample to be unable to truly reflect the water quality characteristics of the target aquifer, resulting in water sample pollution and affecting the accuracy of hydrological exploration.

[0004] Secondly, the deep water sample is in a high pressure environment, when the water sample is extracted from the deep high pressure environment to the surface normal pressure environment, the sharp change of pressure will cause a series of physical and chemical reactions. The dissolved gas in the water will escape due to the decrease of pressure, the mineral will precipitate due to the change of solubility, and the key parameters such as pH value and oxidation-reduction potential of the water sample will change. The change of water quality parameters caused by pressure distortion makes the water sample data detected on the surface unable to truly reflect the in-situ state of deep water body.

[0005] More complex is that when trying to solve the pressure distortion problem by pressure compensation, the pressure fluctuation generated in the compensation process will disturb the flow field, and on the contrary, aggravate the interlayer mixing; while when using a mixed flow channel structure to reduce interlayer mixing, the complex flow channel structure will affect the pressure transmission efficiency and reduce the pressure compensation effect. This coupling interference makes it difficult for traditional technology to solve the two core problems of interlayer mixing and pressure distortion at the same time. SUMMARY

[0006] The present application provides a deep water source detection device for hydrological exploration, which solves the interlayer mixing problem in related technology. During the pumping process, due to the change of pressure gradient and uneven flow rate, the water molecules of adjacent aquifers enter the sampling area through the micro gap or penetration, causing water sample pollution, pressure distortion problem, and coupling interference problem of physical and chemical changes such as dissolved gas escaping, mineral precipitation, and pH value change when the deep water sample is extracted from the high pressure environment to the normal pressure surface. The pressure compensation process may cause flow field disturbance and aggravate interlayer mixing; while the mixed flow channel design may affect the pressure transmission efficiency.

[0007] The present application provides a deep water source detection device for hydrological exploration, which includes: The sampling cylinder is a three-layer concentric cylindrical structure, consisting of a guide cylinder, a compensation cylinder, and a protective cylinder from the inside out. The inner cavity of the guide cylinder forms a water sample flow channel, and the compensation cylinder and the guide cylinder form an annular compensation cavity. The inner wall of the guide cylinder is provided with a spiral guide structure to guide the water flow to form a spiral laminar flow path. The balance holes are distributed in multiple rows along the axial direction of the guide cylinder, and the balance holes penetrate the cylinder wall of the guide cylinder, connecting the inner cavity of the guide cylinder with the working side chamber of the annular compensation cavity. A pressure regulator, comprising a piston assembly and a buffer unit, is disposed within the annular compensation chamber and is used to regulate the pressure of the annular compensation chamber. The pressure regulator is connected to the inner cavity of the guide tube through a balance hole. A pressure compensation device, comprising an air source, a pressure regulating valve, and a pressure sensor group connected to the annular compensation chamber, for providing compensation pressure to the annular compensation chamber; A flow field stabilization device, comprising a differential pressure valve and a pressure reducing valve assembly, is located at the outlet end of the guide tube and is used to regulate the pressure change of the water sample outflow.

[0008] Furthermore, the spiral guide structure includes a spiral guide groove formed on the inner wall of the guide cylinder and a guide plate fixed in the spiral guide groove. The spiral guide groove is a continuous spiral groove structure, and the guide plate extends along the spiral guide groove to form a spiral guide surface.

[0009] Furthermore, the piston of the piston assembly is an annular piston, which is slidably and sealingly connected to the inner wall of the compensation cylinder and the outer wall of the guide cylinder, dividing the annular compensation cavity into a working side chamber and a driving side chamber. The balance hole connects the inner cavity of the guide cylinder and the working side chamber, and the buffer unit is disposed on the working side surface of the annular piston.

[0010] Furthermore, the gas source is connected to the drive-side chamber through the pressure regulating valve, and the pressure sensor group includes an in-situ sensor for detecting external water pressure, a chamber sensor for detecting compensation pressure, and a flow channel sensor for detecting pressure within the flow channel.

[0011] Furthermore, the flow field stabilization device includes a differential pressure valve and a pressure reducing valve assembly. The differential pressure valve is installed at the outlet end of the guide tube and includes a valve body, a valve disc, and an elastic element. The valve disc is supported by the elastic element and the flow cross-sectional area is adjusted according to the pressure difference. The pressure reducing valve assembly is connected in series downstream of the differential pressure valve.

[0012] Furthermore, the inlet end of the flow guide tube is provided with a flow stabilizer, which includes a flow rectifier and a flow guide grid. The flow rectifier has a perforated plate structure, and the flow guide grid is disposed on the outlet side of the flow rectifier.

[0013] Furthermore, the buffer unit consists of multiple capsules, each encapsulating a phase change material. The capsules are fixed to the working side chamber of the piston assembly by a bracket.

[0014] Furthermore, the inlet of the guide tube is connected to a water pump, and the water pump is equipped with a plunger isolation mechanism. The plunger isolation mechanism includes an upper plunger and a lower plunger. Both the upper plunger and the lower plunger include an inflatable air bladder for contacting the borehole wall to form a sealing barrier.

[0015] Furthermore, it also includes a controller, which is electrically connected to the pressure sensor group, the pressure regulating valve and the flow field stabilizing device. The controller adjusts the opening degree of the pressure regulating valve and the operating parameters of the flow field stabilizing device according to the detection signal of the pressure sensor group.

[0016] This invention provides a method for detecting deep water sources, comprising: lowering the deep water source detection device for hydrological exploration to the target aquifer depth; activating the plunger isolation mechanism to form a sealing barrier, isolating the target aquifer from other aquifers; activating the water pump to allow water to flow through the spiral guiding structure of the guide tube to form a spiral laminar flow; detecting pressure signals through a pressure sensor group and controlling the pressure compensation device to provide compensation pressure to the annular compensation chamber; the pressure regulator transmitting the compensation pressure to the inner cavity of the guide tube through the balance hole to maintain the in-situ pressure state of the water sample; and adjusting the pressure change of the water sample outflow through the flow field stabilization device to achieve a gradual transition of the water sample from high pressure to normal pressure.

[0017] The beneficial effects of this invention are as follows: The deep water source detection device for hydrological exploration of this invention overcomes the interlayer mixing factors caused by turbulent water flow in traditional devices by employing a combination of a three-layer concentric cylindrical structure and a spiral flow channel, thus solving the problem of interlayer water pollution. Specifically, the spiral guide channel and guide vanes transform the original straight flow into spiral laminar flow, extending the flow path and enabling the water to form a stable laminar flow state within the guide cylinder. This reduces the radial velocity gradient and suppresses radial seepage and mixing caused by pressure differences. Simultaneously, the flow stabilizer's rectifier plate and guide grid establish uniform inflow conditions at the inlet end, eliminating flow field disturbances at the source.

[0018] Because it employs a direct pressure transmission structure with an annular compensation chamber and a balance orifice, combined with a piston-type pressure regulator and a phase change material buffer unit, it overcomes pressure transmission lag and pressure fluctuation factors, thus solving the problem of pressure distortion in deep water samples. The annular compensation chamber surrounding the guide tube shortens the pressure transmission path, and the direct connection of the balance orifice improves the pressure response speed. The piston assembly divides the compensation chamber into independent chambers, achieving precise pressure control. The phase change energy absorption characteristics of the phase change material provide rapid pressure buffering capacity, effectively suppressing the impact of pressure fluctuations on the water sample.

[0019] Because of the dynamic sealing structure of the bellows sleeve with an annular bellows structure, selective opening and closing of the balance orifice is achieved, overcoming the defect that fixed balance orifices cannot adapt to different depth pressure requirements. The bellows sleeve with the annular bellows structure expands and contracts axially with the movement of the annular piston. According to the sampling depth and pressure requirements, it selectively blocks or opens balance orifices at different axial positions, realizing segmented precise pressure compensation and improving the flexibility and accuracy of pressure compensation.

[0020] Because of the staged pressure reduction structure of the differential pressure regulating system's differential pressure valve and pressure reducing valve assembly, the sudden drop in water quality parameters caused by rapid pressure decreases is overcome, maintaining the in-situ characteristics of the water sample. The differential pressure valve in the differential pressure regulating system maintains stable pressure at the outlet of the guide tube cavity through automatic adjustment of the valve disc via the conical channel within the valve body and the spring connection. The series configuration of the pressure reducing valve assembly in the differential pressure regulating system decomposes the transition from high pressure to normal pressure into multiple small-amplitude pressure reduction processes. Each pressure change is controlled within a range that does not cause significant changes in water quality parameters, preventing the escape of dissolved gases and the precipitation of minerals.

[0021] Because of the use of upper and lower air bladders in the plunger isolation mechanism, the intrusion factors of non-target aquifer water in the borehole annulus are overcome, improving the representativeness of the water samples. The sealing barrier formed by the upper and lower air bladders of the plunger isolation mechanism after inflation physically isolates the target aquifer from other aquifers, fundamentally blocking the channels for interlayer water mixing.

[0022] It should be understood that this invention achieves a technological breakthrough through the synergistic effect of spiral flow channel technology and dynamic pressure compensation technology. The stable laminar flow formed by the spiral flow channel reduces flow field disturbances during the pressure compensation process, improving the accuracy of pressure compensation; while the stable pressure environment reduces radial seepage caused by pressure gradients, enhancing the anti-mixing effect of the spiral flow channel. The two technologies promote each other, and the overall effect is better than the simple superposition of their independent applications, truly achieving high-fidelity acquisition of deep water samples. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the deep water source detection device for hydrological exploration according to the present invention; Figure 2 This is a side view of the deep water source detection device for hydrological exploration according to the present invention; Figure 3 This is a three-dimensional structural diagram of the water pump of the present invention; Figure 4 This is a three-dimensional structural diagram of the sampling cylinder of the present invention; Figure 5 This is a cross-sectional view of the sampling cylinder of the present invention.

[0024] In the figure: 100, sampling cylinder; 101, guide tube; 102, compensation tube; 103, protection tube; 104, spiral guide groove; 200, annular piston; 201, working side chamber; 202, drive side chamber; 300, pressure regulating valve; 400, water pump. Detailed Implementation

[0025] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0026] At least one embodiment of the present invention discloses a deep water source detection device for hydrological exploration, such as... Figure 1 - Figure 5 As shown, it includes a sampling cylinder 100, a pressure compensation device, and a flow field stabilization device.

[0027] The sampling cylinder 100 has a three-layer concentric cylindrical structure. The innermost layer is the guide cylinder 101, the middle layer is the compensation cylinder 102, and the outermost layer is the protective cylinder 103. The three cylinders are fixedly connected by an annular sealing ring to form an integrated structure.

[0028] The inner wall of the guide tube 101 is provided with a spiral guide groove 104. The spiral guide groove 104 is a continuous spiral groove structure, formed on the inner wall surface of the guide tube 101. The pitch is 3 to 5 times the tube diameter, and the groove depth is 1 / 3 of the tube wall thickness. The guide plate is embedded and fixed in the spiral guide groove 104. The guide plate is an arc-shaped thin plate structure that extends along the spiral guide groove 104 to guide the water flow to form a spiral flow path in the inner cavity of the guide tube 101. The inner cavity of the guide tube 101 is a cylindrical flow channel space. The water flows in the inner cavity and is guided by the spiral guide groove 104 and the guide plate to form a spiral laminar flow. A flow stabilizer is provided at the water inlet end of the guide tube 101. The flow stabilizer includes a flow rectifier plate and a flow guide grid. The flow rectifier plate is fixed in the guide tube 101 by a threaded connection, and the flow guide grid is a circular porous structure that is embedded and fixed on the water outlet side of the flow rectifier plate.

[0029] An annular compensation cavity is formed between the compensation cylinder 102 and the guide cylinder 101. The annular compensation cavity is a cylindrical cavity attached between the inner wall of the compensation cylinder 102 and the outer wall of the guide cylinder 101. A pressure regulator is installed within the compensation cavity. The pressure regulator includes a piston assembly and a buffer unit. The piston of the piston assembly is slidably connected to the inner wall of the compensation cavity via a sealing ring, dividing the annular compensation cavity into two independent chambers. The buffer unit consists of multiple capsules, each encapsulating a phase change material. The capsules are fixed to the working side chamber 201 of the piston assembly by a bracket. A balance hole penetrates the wall of the guide cylinder 101, connecting the inner cavity of the guide cylinder 101 with the working side chamber 201 of the annular compensation cavity.

[0030] A retractable corrugated sleeve is provided above the annular piston 200. The bottom end of the corrugated sleeve is connected to the inner edge of the top of the annular piston 200. The inner wall of the corrugated sleeve is attached to the outer wall of the guide cylinder 101. When the annular piston 200 moves horizontally up and down, the corresponding corrugated sleeve slides along the outer wall of the guide cylinder 101 to achieve compression and stretching, and to block the balance hole located in the corrugated sleeve on the guide cylinder 101.

[0031] The pressure compensation device includes a nitrogen source, a pressure regulating valve 300, and a pressure sensor assembly. The nitrogen source is connected to the pressure regulating valve 300 via a high-pressure pipeline, and the pressure regulating valve 300 is connected to the drive-side chamber 202 of the annular compensation chamber via a compensation pipeline. The pressure sensor assembly includes an in-situ sensor, a chamber sensor, and a flow channel sensor. The in-situ sensor is fixed to the water inlet end of the guide tube 101, the chamber sensor is fixed inside the annular compensation chamber, and the flow channel sensor is fixed to the inner wall of the guide tube 101. All three sensors are electrically connected to the controller via signal lines.

[0032] The flow field stabilization device includes a differential pressure valve and a pressure reducing valve assembly. The differential pressure valve is installed at the outlet end of the guide tube 101. The differential pressure valve includes a valve body, a valve disc, and a spring. The valve body is fixed to the end of the guide tube 101 via a threaded connection. The valve body has a conical channel within its interior. The valve body inlet is directly connected to the interior of the guide tube 101, and the valve body outlet is connected to the outlet pipeline. The valve disc is connected to the spring via a valve stem, allowing for sliding adjustment of the flow cross-sectional area within the valve body. The pressure reducing valve assembly includes multiple pressure reducing valves connected in series and fixed to the outlet pipeline via flange connections.

[0033] The bottom inlet of the guide tube 101 is connected to the water pump 400 via a water pump pipe. The water pump 400 has plunger mechanisms at its top and bottom. The lower plunger mechanism includes a lower airbag connected to the bottom of the water pump 400, and the upper plunger mechanism includes an upper airbag fitted onto the water pump pipe. The upper and lower airbags are connected to an air source via valves, allowing the water pump 400 to inflate and contact the borehole wall after moving along the borehole to the desired water layer. This ensures that when the water pump 400 draws water from the desired water layer, water from other water layers is blocked by the airbags.

[0034] The controller establishes communication connections with the pressure sensor group, pressure regulating valve 300, and differential pressure valve via signal lines. The controller incorporates a pressure comparison module and a PID control module. During operation, water enters from the inlet of the guide tube 101, is rectified by the flow stabilizer, and then flows into the inner cavity of the guide tube 101, forming a spiral laminar flow along the spiral guide groove 104 towards the outlet. Based on the signals from the pressure sensor group, the controller adjusts the nitrogen pressure via the pressure regulating valve 300, pushing the piston assembly to move within the annular compensation chamber. This applies compensation pressure to the water sample inside the guide tube 101 through the balance orifice. The phase change material in the buffer unit undergoes a phase change according to the pressure change, absorbing or releasing energy to stabilize the pressure. The differential pressure valve automatically adjusts its opening based on the pressure difference between the inside and outside of the flow channel to maintain stable flow channel pressure. The water sample is output after being progressively depressurized by the pressure reducing valve group.

[0035] The deep water source detection device of this embodiment performs sampling operations according to the following steps: Step 1: The deep water source detection device for hydrological exploration is lowered to the target aquifer depth through the borehole. After the water pump 400 reaches the predetermined position, the upper and lower air bladders of the plunger isolation mechanism are inflated, causing the upper and lower air bladders of the plunger isolation mechanism to expand and contact the borehole wall, forming an upper and lower sealing barrier to isolate the target aquifer from other aquifers.

[0036] Step 2: Start the water pump 400. Water enters from the inlet of the guide tube 101 and passes through the flow stabilizer's rectifier plate and guide grid to achieve flow field homogenization. After entering the inner cavity of the guide tube 101, the water forms a spiral laminar flow under the guidance of the spiral guide groove 104 and guide plates. The spiral flow path prolongs the residence time of the water in the guide tube 101, allowing the water at different radial positions to be fully mixed and homogeneous, eliminating concentration differences caused by local seepage.

[0037] Step 3: The pressure sensor detects the in-situ water pressure at the inlet of the guide tube 101, the pressure in the annular compensation chamber, and the pressure inside the guide tube 101 in real time, and transmits the pressure signal to the controller. The pressure comparison module in the controller calculates the deviation between the actual pressure and the target pressure, and the PID control module in the controller generates a control signal based on the deviation value to adjust the opening of the pressure regulating valve 300 of the pneumatic compensation system.

[0038] Step 4: The pressure regulating valve 300 adjusts the nitrogen pressure according to the control signal. Nitrogen enters the drive side chamber 202 of the annular compensation chamber through the compensation pipeline, pushing the annular piston 200 to move axially within the annular compensation chamber. The movement of the annular piston 200 compresses the volume of the working side chamber 201. The pressure in the working side chamber 201 of the annular compensation chamber is transmitted to the inner cavity of the guide tube 101 through the balance hole, applying compensation pressure to the water sample and maintaining the water sample close to its original pressure state.

[0039] Step 5: When rapid pressure fluctuations occur, the phase change material in the buffer unit undergoes a phase change according to the pressure change. When the pressure increases, the phase change material changes from a solid phase to a liquid phase, absorbing pressure energy; when the pressure decreases, the phase change material changes from a liquid phase to a solid phase, releasing pressure energy, thus achieving rapid pressure buffering and stabilization. Simultaneously, the bellows of the annular bellows structure undergoes axial expansion and contraction deformation as the annular piston 200 moves. Depending on the position of the annular piston 200, balance holes at different axial positions are selectively blocked or opened, achieving segmented and precise pressure compensation.

[0040] Step 6: Under maintained pressure, the water sample flows to the outlet of the guide tube 101 and enters the differential pressure valve of the differential pressure regulating system. The valve disc of the differential pressure regulating system automatically adjusts its position according to the pressure difference between the inner cavity of the guide tube 101 and the outlet pipeline. By changing the flow cross-sectional area of ​​the conical channel in the inner cavity of the valve body, the flow rate is adjusted to maintain the pressure stability inside the guide tube 101 and prevent sudden pressure changes.

[0041] Step 7: After the water sample is initially stabilized by the differential pressure valve of the differential pressure regulating system, it enters the pressure reducing valve group of the differential pressure regulating system. The pressure reducing valve group of the differential pressure regulating system has multiple pressure reducing valves connected in series. Each pressure reducing valve reduces the pressure by a certain amount, realizing a smooth transition of the water sample from high pressure to normal pressure, avoiding physicochemical changes caused by sudden pressure drops, and finally outputting a water sample that maintains the original water quality characteristics.

[0042] In some embodiments, step 3 further includes: the controller presets a pressure compensation curve based on the lowering depth of the deep water source detection device for hydrological exploration and the formation conditions, and automatically adjusts the target pressure value according to the sampling depth to achieve adaptive pressure compensation at different depths.

[0043] In some embodiments, step 5 further includes: when a pressure fluctuation is detected to exceed a preset threshold, the controller activates a fast response mode to improve the response speed of the PID control module in the controller, and at the same time drives the adjusting nut of the differential pressure valve of the differential pressure regulating system to rotate through an electric actuator, thereby changing the spring preload of the differential pressure valve of the differential pressure regulating system and enhancing the pressure stabilization capability.

[0044] The embodiments of the present invention have been described above. However, the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make more equivalent embodiments under the guidance of the present embodiments, and all of them are within the protection scope of the present embodiments.

Claims

1. A deep water source detection device for hydrological exploration, characterized in that, include: The sampling cylinder is a three-layer concentric cylindrical structure, consisting of a guide cylinder, a compensation cylinder, and a protective cylinder from the inside out. The inner cavity of the guide cylinder forms a water sample flow channel, and the compensation cylinder and the guide cylinder form an annular compensation cavity. The inner wall of the guide cylinder is provided with a spiral guide structure to guide the water flow to form a spiral laminar flow path. The balance holes are distributed in multiple rows along the axial direction of the guide cylinder and penetrate the cylinder wall, connecting the inner cavity of the guide cylinder with the working side chamber of the annular compensation cavity. A pressure regulator, comprising a piston assembly and a buffer unit, is disposed within the annular compensation chamber and is used to regulate the pressure of the annular compensation chamber. The pressure regulator is connected to the inner cavity of the guide tube through a balance hole. A pressure compensation device, comprising an air source, a pressure regulating valve, and a pressure sensor group connected to the annular compensation chamber, for providing compensation pressure to the annular compensation chamber; A flow field stabilization device, comprising a differential pressure valve and a pressure reducing valve assembly, is located at the outlet end of the guide tube and is used to regulate the pressure change of the water sample outflow.

2. The deep water source detection device for hydrological exploration according to claim 1, characterized in that: The spiral guide structure includes a spiral guide groove formed on the inner wall of the guide cylinder and a guide plate fixed in the spiral guide groove. The spiral guide groove is a continuous spiral groove structure, and the guide plate extends along the spiral guide groove to form a spiral guide surface.

3. The deep water source detection device for hydrological exploration according to claim 1, characterized in that: The piston of the piston assembly is an annular piston. The annular piston is slidably and sealingly connected to the inner wall of the compensation cylinder and the outer wall of the guide cylinder, dividing the annular compensation cavity into a working side chamber and a driving side chamber. The balance hole connects the inner cavity of the guide cylinder and the working side chamber. The buffer unit is disposed on the working side surface of the annular piston.

4. The deep water source detection device for hydrological exploration according to claim 3, characterized in that: The gas source is connected to the drive-side chamber through the pressure regulating valve. The pressure sensor group includes an in-situ sensor for detecting external water pressure, a chamber sensor for detecting compensation pressure, and a flow channel sensor for detecting pressure within the flow channel.

5. The deep water source detection device for hydrological exploration according to claim 1, characterized in that: The flow field stabilization device includes a differential pressure valve and a pressure reducing valve assembly. The differential pressure valve is installed at the outlet end of the guide tube and includes a valve body, a valve disc, and an elastic element. The valve disc is supported by the elastic element and the flow cross-sectional area is adjusted according to the pressure difference. The pressure reducing valve assembly is connected in series downstream of the differential pressure valve.

6. The deep water source detection device for hydrological exploration according to claim 1, characterized in that: The inlet end of the flow guide tube is equipped with a flow stabilizer, which includes a flow rectifier plate and a flow guide grid. The flow rectifier plate has a perforated plate structure, and the flow guide grid is located on the outlet side of the flow rectifier plate.

7. The deep water source detection device for hydrological exploration according to claim 3, characterized in that: The buffer unit consists of multiple capsules, each containing a phase change material. The capsules are fixed to the working side chamber of the piston assembly by a bracket.

8. The deep water source detection device for hydrological exploration according to claim 1, characterized in that: The inlet of the guide tube is connected to a water pump, and the water pump is equipped with a plunger isolation mechanism. The plunger isolation mechanism includes an upper plunger and a lower plunger. Both the upper plunger and the lower plunger include an inflatable air bladder for contacting the borehole wall to form a sealing barrier.

9. The deep water source detection device for hydrological exploration according to claim 4, characterized in that: It also includes a controller, which is electrically connected to the pressure sensor group, the pressure regulating valve and the flow field stabilizing device. The controller adjusts the opening of the pressure regulating valve and the operating parameters of the flow field stabilizing device according to the detection signal of the pressure sensor group.

10. A method for detecting deep water sources, characterized in that, include: The deep water source detection device for hydrological exploration as described in any one of claims 1 to 9 is lowered to the target aquifer depth; the plunger isolation mechanism is activated to form a sealing barrier, isolating the target aquifer from other aquifers; the water pump is activated, causing the water to flow through the spiral guide structure of the guide tube to form a spiral laminar flow; the pressure signal is detected by the pressure sensor group, and the pressure compensation device is controlled to provide compensation pressure to the annular compensation chamber; the pressure regulator transmits the compensation pressure to the inner cavity of the guide tube through the balance hole to maintain the in-situ pressure state of the water sample; By adjusting the pressure change of the water sample outflow through a flow field stabilization device, the water sample can be gradually transitioned from high pressure to normal pressure.

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