A leakage detection device for underground structure

Abstract

The invention discloses a leakage detection device for underground structures, and relates to the technical field of leakage detection for underground structures, comprising a detection platform, wherein the upper surface of the detection platform is respectively fixedly connected with a controller and a tool platform, the front and back sides of the detection platform are respectively fixedly connected with detectors, and the bottom surface of the detection platform is respectively fixedly connected with two groups of moving rods and a multi-stage electric telescopic rod. The leakage detection device for underground structures can further increase the adaptability to terrain on the basis of detecting ground infiltration by setting an adaptive pressure sensing unit, adapt to complex underground surface contours, detect ground leakage through a multi-contact sensing array, fit relatively complex terrain through multiple soft rubber tentacles, and each soft rubber tentacle branch tip is provided with a high-sensitivity pressure sensor, and the soft rubber tentacle can stretch, bend and fit tightly according to irregular surfaces such as soil and rock gaps, so as to capture subtle pressure changes caused by leakage in all directions.

Description

Technical Field

[0001] The invention relates to the technical field of underground structure leakage detection, in particular to a leakage detection device for an underground structure. Background Art

[0002] Underground structure leakage detection refers to the process of using specific technical means and equipment to systematically check whether the waterproof barrier of various underground building facilities (such as underground parking lots, subway tunnels, basements, water conservancy dams, underground concrete structures and masonry structures) has failed, and whether there are through-holes or cracks inside the structure that cause groundwater penetration and accumulation. It aims to discover leakage risks at an early stage, lay a solid foundation for timely repairs, and ensure the durability and safety of the structure. The detection covers multi-dimensional information acquisition such as leakage location determination, leakage degree quantification and leakage path tracking.

[0003] When inspecting underground structures, it is generally necessary to use visual observation, destructive sampling and traditional electrical inspection. The visual observation method relies on manual regular inspections of the surface of underground structures to check for water stains, moisture marks, precipitates and other visual signs of leakage. However, the underground environment is dim, complex pipelines and lines are blocked, and small leaks are easy to be ignored. Only problems that have seeped into the visible surface can be found. It is difficult to detect initial leakage and hidden leakage points inside the structure. The detection accuracy is low, and the best time for repair is often delayed. Destructive sampling inspection: drilling and coring to observe the moisture content and microscopic cracks inside the structure can provide in-depth insight into the interior. However, it destroys the structural integrity, the drilling positions are highly random, and it is difficult to accurately locate the key leakage areas. At the same time, large-scale detection is costly and inefficient, and subsequent repair drilling also increases the risk of leakage. It is not suitable for high-precision, large-scale underground structure leakage investigation. Finally, traditional electrical detection: based on the electrical differences between the underground structure and the leakage area (such as resistivity), an electrode array is arranged for measurement and analysis. However, the electrical properties of surrounding media such as soil are uneven, and underground metal objects have serious interference, resulting in large data fluctuations and frequent misjudgments. Especially under complex geological and multi-interference source conditions, it is difficult to clearly outline the leakage contour and lock the leakage point, and the accuracy is greatly reduced.

[0004] Combining the above problems, we will find that it is difficult to avoid the above problems at the same time when using the existing underground structure leakage detection devices on the market, and even if they can be solved, they need to be solved with the cooperation of external tools, which cannot achieve the desired effect. Therefore, we propose a leakage detection device for underground structures. Summary of the invention

[0005] The object of the present invention is to provide a leakage detection device for underground structures to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a leakage detection device for underground structures, comprising a detection platform, the upper surface of which is fixedly connected to a controller and a tool platform, the front and back of which are fixedly connected to detectors, the bottom surface of which is fixedly connected to two groups of moving rods and a multi-stage electric telescopic rod, and the interior of which is respectively clamped with underground drilling equipment and three drill bits; An adaptive pressure sensing unit is provided below the detection platform, and the adaptive pressure sensing unit is located below the multi-stage electric telescopic rod, and the adaptive pressure sensing unit is used to detect ground leakage within a certain range; An ion storage unit is provided inside the detection platform, and the ion storage unit is located on the left side of the adaptive pressure sensing unit, and the ion storage unit is used to control the amount of ion solution; An ion active detection unit is arranged on the outside of the detection platform. The ion active detection unit is located on both sides of the ion storage unit. The ion active detection unit is used to perform rapid detection on the ion solution.

[0007] Preferably, the adaptive pressure sensing unit includes a sleeve, the bottom surface of the sleeve is fixedly connected to a plurality of identical supporting feet, the sleeve is slidably connected to a telescopic head inside, the top of the sleeve and the top of the telescopic head are respectively fixedly connected to the two telescopic ends of the multi-stage electric telescopic rod, the bottom surface of the telescopic head is fixedly connected to a connecting column, the outer surface of the connecting column is fixedly connected to twelve connecting plates, the bottom surface of each connecting plate is movably hinged with a group of step plates, the bottom surface of each group of step plates is fixedly connected to a group of movable plates, the bottom surface of each group of movable plates is fixedly connected to five steel wires, the bottom end of each steel wire is fixedly connected to an auxiliary ball, the outer surface of the telescopic head is fixedly connected to four downward pressing blocks, a plastic top layer is provided below the detection table, the upper surface of the plastic top layer is provided with a plurality of identical through openings, the upper surface of the plastic top layer is fixedly connected to a conical plate, each of the supporting foot bottoms The outer surfaces of the ends are fixedly connected to the inner wall of the conical plate, twelve groups of U-shaped hooks are fixedly connected to the bottom surface of the plastic top layer, and seven first tension springs are clamped on the outer surface of each group of the U-shaped hooks, and the bottom surface of the plastic top layer is fixedly connected to a fixed disk, and twelve rubber bottom plates are fixedly connected to the outer surfaces of the fixed disks, and three rubber pull strips are fixedly connected to the outer surfaces of every two of the rubber bottom plates, and the upper surface of each of the rubber bottom plates is fixedly connected to the bottom ends of the seven first tension springs, and four connecting pieces are clamped on the bottom surface of each of the rubber bottom plates, and twelve soft rubber tentacles are hinged inside the fixed disk, and the outer surface of each of the soft rubber tentacle is fixedly connected to the bottom end of the connecting piece, and the outer surface of each of the soft rubber tentacle is fixedly connected to a number of identical high-sensitivity pressure sensors, and the controller is electrically connected to the multi-stage electric telescopic rod, the high-sensitivity pressure sensor and the detector through wires.

[0008] Preferably, six first buffer springs are fixedly connected to the upper surface of the plastic top layer, and the top ends of the six first buffer springs are commonly fixedly connected to a pressure plate, and the upper surface of the pressure plate is fixedly connected to four transmission plates, and one end of each transmission plate is fixedly connected to a sliding block, and the outer surface of the sleeve is provided with two sliding openings, and the outer surface of each sliding block is slidably connected to the inside of the sliding opening, and the interior of each pressure plate is slidably connected to an adjusting cylinder through a slider, and the interior of each through opening is slidably connected to the outer surface of the adjusting cylinder, and the inner top wall of each adjusting cylinder is fixedly connected to a second buffer spring, and the bottom end of the second buffer spring is fixedly connected to a reset shell, and the inner wall of the adjusting cylinder is provided with six balancing grooves, and six balancing blocks are fixedly connected to the outer surface of the reset shell, and the outer surface of each balancing block is slidably connected to the inside of the balancing groove, and the inner top wall of the reset shell is fixedly connected to a conical shell, and the inner wall of the conical shell is rotatably connected A rolling ball is connected, the outer surface of the rolling ball is fixedly connected to a connecting rod, the bottom end of the connecting rod is fixedly connected to a connecting seat, the bottom surface of the connecting seat is fixedly connected to a conical column, the bottom end of the conical column is fixedly connected to a nitrile rubber block, the inner wall of the connecting seat is fixedly connected to four inclined plates, each inner wall of the connecting seat is movably hinged with a styrene-butadiene rubber plate, the outer surface of each styrene-butadiene rubber plate is in contact with the outer surface of the inclined plate, the outer surface of each styrene-butadiene rubber plate is fixedly connected to the inner wall of the reset shell with a first reset spring, polyurethane rubber is arranged below each styrene-butadiene rubber plate, a number of identical arc balls are fixedly connected to the outer surface of each polyurethane rubber, five cis-butadiene rubber blocks and four silicone rubber strips are fixedly connected to the outer surface of each polyurethane rubber, the outer surface of each polyurethane rubber is fixedly connected to the bottom surface of the styrene-butadiene rubber plate, and the outer surface of each silicone rubber strip is fixedly connected to the outer surface of the styrene-butadiene rubber plate.

[0009] Preferably, the ion storage unit includes a liquid storage tank, the outer surface of the liquid storage tank is fixedly connected to the inner wall of the detection bench, the inner wall of the detection bench is fixedly connected with an isolation plate, the bottom surface of the isolation plate is in contact with the upper surface of the liquid storage tank, the upper surfaces of the isolation plate are respectively fixedly connected with a first ion storage tank and two second ion storage tanks, the upper surface of the liquid storage tank is fixedly connected with three flow tubes, one end of the three flow tubes away from the liquid storage tank is respectively fixedly connected with the left side surface of the first ion storage tank and the left side surfaces of the two second ion storage tanks, the left side of the liquid storage tank is fixedly connected with a drain pipe, the outer surface of the drain pipe is fixedly connected with a valve, the bottom surface of the detection bench is fixedly connected with a connecting block, and the inner wall of the connecting block is fixedly connected to the outer surface of the drain pipe.

[0010] Preferably, a capacitive pressure sensor is fixedly connected to the inner wall of the liquid storage tank, a vacuum pump is fixedly connected to the inner wall of the detection platform, an output end of the vacuum pump is fixedly connected to an exhaust pipe, an end of the exhaust pipe away from the vacuum pump passes through the interior of the liquid storage tank, four injection pipes are arranged inside the detection platform, lower ends of the four injection pipes are respectively fixedly connected to the upper surface of the liquid storage tank, the upper surface of the first ion storage box and the upper surfaces of the two second ion storage boxes, and the controller is electrically connected to the capacitive pressure sensor and the vacuum pump through wires.

[0011] Preferably, the inner wall of each of the movable rods is fixedly connected to a first detection tube, the inner wall of each of the first detection tubes is fixedly connected to a first rubber stopper and a first sensitive membrane, a first internal reference electrode is arranged inside each of the first detection tubes, the detection end of each of the first internal reference electrodes passes through the first rubber stopper and the first sensitive membrane in sequence and extends to the interior of the first detection tube, one end of each of the first detection tubes is fixedly connected to a first signal transmission line, and the detector is electrically connected to the first signal transmission line through a wire.

[0012] Preferably, the front and back sides of the detection platform are both movably hinged with storage boxes through folding parts, and the front and back sides of the detection platform are provided with storage grooves, the inner wall of each of the storage grooves is fixedly connected with a centrifuge and a micro water pump, the interior of each of the centrifuges is clamped with a separation tube, the input end and the output end of the micro water pump are respectively fixedly connected with a water inlet pipe and a water outlet pipe, the outer surface of the water inlet pipe is fixedly connected with a clamping block, the interior of the clamping block is clamped with the outer surface of the water inlet pipe, the interior of each of the storage boxes is provided with an extension tube and a sliding threaded tube, the outer surface of each of the extension tubes is provided with a preset pipe orifice, the interior of each of the extension tubes and the interior of the sliding threaded tube are jointly provided with an extension rod, the outer surface of each of the extension rods is fixedly connected with an inner plate, the interior of each of the extension tubes and the interior of the sliding threaded tube are jointly slidably connected to the outer surface of the extension rod through the inner plate, the interior of each of the extension rods is respectively provided with a docking chamber and a power chamber, and the inner wall of each of the power chambers is respectively fixedly connected with a micro motor, a first sealed bearing and a second sealed bearing The output end of each micro-motor is fixedly connected to a transmission shaft, one end of each transmission shaft is fixedly connected to a transmission gear, the inner ring of each first sealed bearing is fixedly connected to a transmission disk, the outer surface of each transmission disk is fixedly connected to three transmission rods, one end of each of the three transmission rods is commonly fixedly connected to a main gear, the outer surface of each main gear is fixedly connected to a transmission cylinder, the outer surface of the transmission cylinder is fixedly connected to the inner ring of the second sealed bearing, one end of each transmission cylinder is fixedly connected to a sampling head, the inner wall of each sampling head is fixedly connected to a third sealed bearing and a sealing clamp ring, the inner ring of each third sealed bearing is fixedly connected to a sampling tube, the outer surface of each sampling tube is fixedly connected to a limiting ring, the outer surface of each limiting ring is clamped with the inside of the sealing clamp ring, the inner wall of each sampling head is threadedly connected to a sealing plug, and the end of each sampling tube away from the sampling head sequentially penetrates the transmission cylinder, the second sealed bearing, the main gear, the transmission disk and the power cavity and extends to the inside of the docking cavity.

[0013] Preferably, the interior of each of the extension rods is slidably connected to a protective tube, the inner wall of each of the protective tubes is fixedly connected to a docking tube, the outer surface of each sampling tube and the outer surface of the docking tube are fixedly connected to a connecting tube, the outer surfaces of every two connecting tubes are fixedly connected to a fixing ring and a threaded ring, the outer surface of each fixing ring is fixedly connected to the inner wall of the docking cavity, the outer surface of each threaded ring is threadedly connected to the inner wall of the docking cavity, the end of each sampling tube away from the sampling head is fixedly connected to a first conical docking joint, the end of each docking tube close to the sampling head is fixedly connected to a second conical docking joint, and every two connecting tubes are fixedly connected to a fixing ring and a threaded ring. The outer surfaces of the cylinders are provided with threaded grooves, and the outer surfaces of the other two connecting cylinders are fixedly connected to two threaded docking rings, the outer surface of each extension rod is provided with two positioning grooves, the outer surface of each sliding threaded cylinder is provided with two reset ports, the inner wall of each reset port is fixedly connected to two second reset springs, and the tops of each two second reset springs are commonly fixedly connected to a positioning plug, the outer surface of each sliding threaded cylinder is threadedly connected to a sealing threaded cylinder, the outer surface of each sliding threaded cylinder is fixedly connected to two limit rings, and the outer surface of each extension cylinder is threadedly connected to the inner wall of the sliding threaded cylinder.

[0014] Preferably, each of the storage boxes is provided with a micro peristaltic pump and a pretreatment cylinder, the bottom surface of each of the micro peristaltic pumps is fixedly connected to the inner bottom wall of the storage box, the outer surface of each of the pretreatment cylinders and the outer surface of the extension cylinder are in contact with the inner wall of the storage box, the output end and the input end of each of the micro peristaltic pumps are respectively fixedly connected with a discharge pipe and a connecting pipe, the inner wall of each of the pretreatment cylinders is threadedly connected with a rotary cylinder, the inner wall of the rotary cylinder is respectively fixedly connected with a coarse filter screen, a first metal braided filter screen and a second metal braided filter screen, the connecting tube extends from one end of the micro peristaltic pump away from the micro peristaltic pump to the inside of the rotary cylinder, and each of the pretreatment cylinders is One end is fixedly connected to a sampling tube, a movable tube is clamped inside each of the sampling tubes, a fixed head is fixedly connected to the outer surface of each sampling tube, a movable cartridge is threadedly connected to the outer surface of each movable tube, the inner wall of each movable cartridge is threadedly connected to the outer surface of the fixed head, one end of each movable tube passes through a preset pipe opening to the interior of the extension tube, a fourth sealed bearing is fixedly connected to the inner wall of the movable tube, the inner ring of each fourth sealed bearing is fixedly connected to the outer surface of the docking tube, and the controller is electrically connected to the micro peristaltic pump, the centrifuge, the micro water pump and the micro motor respectively through wires.

[0015] Preferably, the inner wall of each storage box is rotatably connected to a detection cylinder, the outer surface of each detection cylinder is threadedly connected to a filter cylinder, the outer surface of each filter cylinder is threadedly connected to a water inlet cylinder, the end of each outlet pipe away from the micro water pump passes through the interior of the water inlet cylinder, the inner wall of each detection cylinder is fixedly connected to an arc seat, the inner wall of each arc seat is fixedly connected to a second detection tube, the inner wall of each second detection tube is fixedly connected to a second rubber stopper and a second sensitive membrane, the interior of each second detection tube is provided with a second internal reference electrode, and the detection end of each second internal reference electrode is connected according to The second rubber stopper and the second sensitive membrane are penetrated and extended to the interior of the second detection tube, one end of each of the second detection tubes is fixedly connected with a second signal transmission line, one end of each of the second signal transmission lines penetrates the detection cylinder and extends to the outside of the detection cylinder, the inner wall of the detection cylinder and the inner wall of the filter cylinder are fixedly connected with annular sealing gaskets, the outer surfaces of the two annular sealing gaskets are in contact with the inner wall of the detection cylinder and the inner wall of the filter cylinder, the inner wall of the filter cylinder is fixedly connected with a cellulose acetate filter membrane, a nylon filter membrane and a polyvinylidene fluoride filter membrane, respectively, and the detector is electrically connected to the second signal transmission line through a wire.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with an adaptive pressure sensing unit, which can further increase the adaptability to terrain on the basis of detecting ground penetration, adapt to complex underground surface contours, detect ground leakage through a multi-contact sensing array, and fit relatively complex terrain through multiple soft rubber tentacles. A high-sensitivity pressure sensor is provided at the branch end of each soft rubber tentacle. Since the soft rubber tentacle is compressible, when the device is placed at an underground detection point, the soft rubber tentacle can stretch, bend and fit tightly according to irregular surfaces such as soil and rock gaps, so as to capture subtle pressure changes caused by leakage in all directions, thereby greatly improving the pressure monitoring accuracy and coverage.

[0017] The present invention, by setting an active ion detection unit, can further actively increase the detection efficiency on the basis of passive plasma approach through a fixed electrode, extract the ion solution that penetrates underground through a sampling head controlled by a mechanical structure, and actively collect the ion solution in the suspected leakage area by pre-punching holes. Moreover, after sampling, the soil and interfering ions can be quickly filtered through a pretreatment cylinder, a centrifuge and a filter cylinder to increase the ion concentration, which can not only optimize the sample but also speed up the detection frequency, and further cooperate with the adaptive pressure sensing unit to increase the accuracy of bottom surface leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a schematic structural diagram of a cross-section of the detection platform of the present invention; Figure 3 It is a schematic structural diagram of a cross-section of the sleeve of the present invention; Figure 4 It is a structural schematic diagram of the multi-stage electric telescopic rod of the present invention; Figure 5 It is a schematic structural diagram of a cross-section of a pressure plate of the present invention; Figure 6 This is a schematic diagram of the structure of the top layer of the plastic of the present invention; Figure 7 This is a detailed enlarged structural diagram of the soft rubber tentacle of the present invention; Figure 8 It is a detailed enlarged structural schematic diagram of the U-shaped hook of the present invention; Fig. 9 It is a schematic structural diagram of a cross-section of the regulating tube of the present invention; Fig.10 It is a schematic structural diagram of a cross-section of the reset shell of the present invention; Fig.11 This is a schematic diagram of the structure of the nitrile rubber block of the present invention; Fig.12 It is a side view structural schematic diagram of the vacuum pump of the present invention; Fig.13 It is a schematic structural diagram of a cross-section of a first detection tube of the present invention; Fig.14 It is a structural schematic diagram of the storage box of the present invention; Fig.15 It is a structural schematic diagram of a cross-section of the water inlet cylinder of the present invention; Fig.16 It is a structural schematic diagram of a cross-section of the extension tube of the present invention; Fig.17 It is a detailed enlarged structural schematic diagram of the sliding threaded barrel of the present invention; Fig.18 It is a detailed enlarged structural schematic diagram of the transmission gear of the present invention; Fig.19 It is a detailed enlarged structural schematic diagram of the threaded butt joint ring of the present invention; Fig. 20 It is a detailed enlarged structural schematic diagram of the sampling head of the present invention; Fig.21 It is a detailed enlarged structural schematic diagram of the step plate of the present invention.

[0019] In the figure: 1. test bench; 2. liquid storage tank; 3. moving rod; 4. storage slot; 5. first test tube; 6. storage box; 7. test tube; 8. rubber bottom plate; 9. plastic top layer; 10. pressure plate; 11. detector; 12. tool bench; 13. underground drilling equipment; 14. drill bit; 15. controller; 16. sleeve; 17. transmission plate; 18. connecting block; 19. drain pipe; 20. second ion storage box; 21. valve; 22. injection pipe; 23. exhaust pipe; 24. capacitive pressure sensor; 25. circulation pipe; 26. lower pressure block; 27. telescopic head; 28. connecting column; 29. ​​steel wire; 30. auxiliary ball; 31. support foot; 32. multi-stage electric telescopic rod; 33. adjustment tube; 34. conical plate ; 35. First buffer spring; 36. Through port; 37. Rubber pull strip; 38. Fixed plate; 39. High-sensitivity pressure sensor; 40. Connector; 41. Soft rubber tentacle; 42. First extension spring; 43. U-shaped hook; 44. Nitrile rubber block; 45. Styrene-butadiene rubber sheet; 46. Polyurethane rubber; 47. Slider; 48. Balance groove; 49. Second buffer spring; 50. Reset shell; 51. Balance block; 52. Silicone rubber strip; 53. Conical shell; 54. Connecting rod; 55. Connecting seat; 56. First reset spring; 57. Rolling ball; 58. Inclined plate; 59. Conical column; 60. Arc ball; 61. Butadiene rubber block; 62. First ion storage box; 63. Isolation plate; 64. Vacuum pump; 65. First internal reference comparison electrode; 66, reset port; 67, first signal transmission line; 68, first sensitive membrane; 69, first rubber stopper; 70, separation tube; 71, centrifuge; 72, micro water pump; 73, discharge pipe; 74, water inlet cylinder; 75, filter cylinder; 76, micro peristaltic pump; 77, pretreatment cylinder; 78, movable tube; 79, preset pipe mouth; 80, extension cylinder; 81, sampling tube; 82, sealing thread cylinder; 83, block; 84, water inlet pipe; 85, water outlet pipe; 86, second detection tube; 87, arc seat; 88, polyvinylidene fluoride filter membrane; 89, nylon filter membrane; 90, cellulose acetate filter membrane; 91, annular sealing pad; 92, second sensitive membrane; 93, second signal transmission line; 94, second internal reference electrode; 95, first Second rubber plug; 96, connecting pipe; 97, second metal braided filter; 98, first metal braided filter; 99, coarse filter; 100, protective tube; 101, movable cartridge; 102, fixed head; 103, positioning groove; 104, inner plate; 105, positioning plug; 106, extension rod; 107, sampling head; 108, second sealed bearing; 109, transmission cylinder; 110, micro motor; 111, sliding threaded cylinder; 112, fourth sealed bearing; 113, docking chamber; 114, threaded groove; 115, first conical docking head; 116, threaded ring; 117, docking tube; 118, main gear; 119, third sealed bearing; 120, sealing plug; 121, sealing clamp ring; 122, second return spring;123, sliding block; 124, transmission rod; 125, power chamber; 126, transmission gear; 127, first sealed bearing; 128, transmission shaft; 129, transmission plate; 130, sampling tube; 131, connecting tube; 132, fixing ring; 133, threaded docking ring; 134, second conical docking joint; 135, limiting ring; 136, limiting ring; 137, sliding port; 138, rotating cylinder; 139, connecting plate; 140, step plate; 141, movable plate. ; DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8The present invention provides a technical solution: a leakage detection device for underground structures, comprising a detection platform 1, wherein the upper surface of the detection platform 1 is respectively fixedly connected with a controller 15 and a tool platform 12, the front and back surfaces of the detection platform 1 are respectively fixedly connected with detectors 11, the bottom surface of the detection platform 1 is respectively fixedly connected with two groups of moving rods 3 and a multi-stage electric telescopic rod 32, the interior of the tool platform 12 is respectively clamped with underground drilling equipment 13 and three drill bits 14, an adaptive pressure sensing unit is arranged below the detection platform 1, the adaptive pressure sensing unit is located below the multi-stage electric telescopic rod 32, and the adaptive pressure sensing unit is used to detect ground leakage within a certain range, and the adaptive pressure sensing unit is used to detect ground leakage within a certain range. The pressure sensing unit includes a sleeve 16, the bottom surface of the sleeve 16 is fixedly connected to a plurality of identical supporting feet 31, the inside of the sleeve 16 is slidably connected to a telescopic head 27, the top of the sleeve 16 and the top of the telescopic head 27 are respectively fixedly connected to the two telescopic ends of the multi-stage electric telescopic rod 32, the bottom surface of the telescopic head 27 is fixedly connected to a connecting column 28, the outer surface of the connecting column 28 is fixedly connected to twelve connecting plates 139, the bottom surface of each connecting plate 139 is movably hinged to a group of step plates 140, the bottom surface of each group of step plates 140 is fixedly connected to a group of movable plates 141, the bottom surface of each group of movable plates 141 is fixedly connected to five steel wires 29, each The bottom ends of the steel wires 29 are fixedly connected with auxiliary balls 30, the outer surface of the telescopic head 27 is fixedly connected with four lower pressing blocks 26, a plastic top layer 9 is arranged below the test platform 1, a plurality of identical through openings 36 are opened on the upper surface of the plastic top layer 9, a conical plate 34 is fixedly connected to the upper surface of the plastic top layer 9, the outer surface of the bottom end of each supporting foot 31 is fixedly connected to the inner wall of the conical plate 34, twelve groups of U-shaped hooks 43 are fixedly connected to the bottom surface of the plastic top layer 9, seven first tension springs 42 are clamped on the outer surface of each group of U-shaped hooks 43, a fixed plate 38 is fixedly connected to the bottom surface of the plastic top layer 9, and twelve rubber The rubber base plate 8 has three rubber pull strips 37 fixedly connected to the outer surfaces of every two rubber base plates 8, the upper surface of each rubber base plate 8 is fixedly connected to the bottom ends of seven first tension springs 42, and the bottom surface of each rubber base plate 8 is clamped with four connecting pieces 40. The internal movable hinges of the fixed plate 38 have twelve soft rubber tentacles 41, and the outer surface of each soft rubber tentacle 41 is fixedly connected to the bottom end of the connecting piece 40. The outer surface of each soft rubber tentacle 41 is fixedly connected to a number of identical high-sensitivity pressure sensors 39, and the controller 15 is electrically connected to the multi-stage electric telescopic rod 32, the high-sensitivity pressure sensor 39 and the detector 11 through wires.

[0022] By setting up an adaptive pressure sensing unit, it is possible to further increase the adaptability to terrain on the basis of detecting ground penetration, adapt to complex underground surface contours, detect ground leakage through a multi-contact sensing array, and fit the relatively complex terrain through multiple soft rubber tentacles 41. Each branch end of the soft rubber tentacle 41 is provided with a high-sensitivity pressure sensor 39. Since the soft rubber tentacle 41 is compressible, when the device is placed in the underground detection point, the soft rubber tentacle 41 can stretch, bend and fit tightly according to irregular surfaces such as soil and rock gaps, and capture subtle pressure changes caused by leakage in all directions, greatly improving the pressure monitoring accuracy and coverage; See also Figure 5 , Fig. 9 , Fig.10 and Fig.11Six first buffer springs 35 are fixedly connected to the upper surface of the plastic top layer 9, and the top ends of the six first buffer springs 35 are fixedly connected to the pressure plate 10. Four transmission plates 17 are fixedly connected to the upper surface of the pressure plate 10, and one end of each transmission plate 17 is fixedly connected to a sliding block 123. Two sliding openings 137 are provided on the outer surface of the sleeve 16, and the outer surface of each sliding block 123 is slidably connected to the inside of the sliding opening 137. The inside of each pressure plate 10 is slidably connected to the adjusting cylinder 33 through the slider 47, and the inside of each through opening 36 is slidably connected to the outer surface of the adjusting cylinder 33. The inner top wall of each adjusting cylinder 33 is fixedly connected with a second buffer spring 49, and the bottom end of the second buffer spring 49 is fixedly connected with a reset shell 50. The inner wall of the adjusting cylinder 33 is provided with six balancing grooves 48. The outer surface of the reset shell 50 is fixedly connected with six balancing blocks 51. The outer surface of each balancing block 51 is slidably connected with the inside of the balancing groove 48. The inner top wall of the reset shell 50 is fixedly connected with a conical shell 53. The inner wall of the conical shell 53 is rotatably connected with a rolling ball 57. The outer surface of the rolling ball 57 is fixedly connected with a connecting rod 54. The bottom end of the connecting rod 54 is fixedly connected with a connecting seat 55. The bottom of the connecting seat 55 is fixedly connected with a connecting rod 54. The surface is fixedly connected with a conical column 59, the bottom end of the conical column 59 is fixedly connected with a nitrile rubber block 44, the inner wall of the connecting seat 55 is fixedly connected with four inclined plates 58, the inner wall of each connecting seat 55 is movably hinged with a styrene-butadiene rubber plate 45, the outer surface of each styrene-butadiene rubber plate 45 is in contact with the outer surface of the inclined plate 58, the outer surface of each styrene-butadiene rubber plate 45 is fixedly connected with a first reset spring 56 together with the inner wall of the reset shell 50, and a polyurethane rubber 46 is arranged below each styrene-butadiene rubber plate 45, and the outer surface of each polyurethane rubber 46 is fixedly connected with a plurality of identical arc balls 60, each The outer surface of each polyurethane rubber 46 is fixedly connected with five cis-butadiene rubber blocks 61 and four silicone rubber strips 52. The outer surface of each polyurethane rubber 46 is fixedly connected to the bottom surface of the styrene-butadiene rubber plate 45. The outer surface of each silicone rubber strip 52 is fixedly connected to the outer surface of the styrene-butadiene rubber plate 45. By arranging the rolling ball 57, the inclined plate 58, the styrene-butadiene rubber plate 45, the first return spring 56, the polyurethane rubber 46 and the nitrile rubber block 44, the soft rubber tentacle 41 and the high-sensitivity pressure sensor 39 can be further compressed to make them better fit the ground, so as to facilitate the detection of underground leakage.

[0023] The specific implementation of this embodiment is as follows: when it is necessary to detect ground leakage through the adaptive pressure sensing unit, at this time, the entire device is in the initial position below the detection platform 1, and the multi-stage electric telescopic rod 32 drives the entire device to move downward, and the soft rubber tentacle 41 stops after contacting the ground. Since the soft rubber tentacle 41 is movably hinged on the fixed plate 38 and is compressible itself, when it contacts a complex underground surface, such as soil or rock cracks, the soft rubber tentacle 41 will stretch and bend according to the irregular shape of the ground to fit the ground as much as possible. Since the high-sensitivity pressure sensor 39 is arranged at the bottom of the soft rubber tentacle 41, the high-sensitivity pressure sensor 39 is directly in close contact with the ground, and the high-sensitivity pressure sensor 39 directly senses the ground. At the same time, the rubber bottom plate 8 drops as the soft rubber tentacle 41 presses down. Since the rubber bottom plate 8 itself has a relatively large elasticity, it can cooperate with the soft rubber tentacle 41 to contact the ground and press the soft rubber tentacle 41. The first tension spring 42 between the rubber bottom plate 8 and the plastic top layer 9 is stretched, and the rubber pull strip 37 is also deformed with the shape of the rubber bottom plate 8 and different drop heights, so that the rubber bottom plate 8 can better adapt to terrain changes and provide stable support for the soft rubber tentacle 41. Then, the first telescopic end of the multi-stage electric telescopic rod 32 continues to push the telescopic head 27, and the connecting column 28, the connecting plate 139, the step plate 140 and the movable plate 141 are driven downward in turn through the telescopic head 27, and the bottom steel wire 2 is directly driven through the movable plate 141. 9 descends, the steel wire 29 can extend directly through the opening between the supporting foot 31 and the conical plate 34 through the auxiliary ball 30 at the bottom. Since the length of the steel wire 29 from the outside to the inside is decreasing, the steel wire 29 can directly press the action inside evenly onto the surface of the plastic top layer 9, preliminarily compressing the soft rubber tentacle 41 and the high-sensitivity pressure sensor 39 so that they can better fit the ground, and the sliding block 123 slides inside the sliding opening 137 and extends a part into the sleeve 16. When the telescopic head 27 is pressed down, the telescopic head 27 can directly drive the four sliding blocks 123 to be pressed down through the four pressing blocks 26, and the transmission plate 17 is pressed down through the sliding block 123, and the pressure plate 10 is pressed down as a whole through the transmission plate 17, and then the pressure plate 10 drives the adjusting cylinder 33 to move downward directly, and the adjusting cylinder 33 can slide downward in the through port 36. The reset shell 50 keeps steady descending in the adjusting cylinder 33 through the cooperation of the balancing block 51 and the balancing groove 48. When the polyurethane rubber 46 contacts the rubber bottom plate 8, it directly generates pressure on it. Since the adjusting cylinder 33 is slidably connected with the inside of the pressure plate 10, the polyurethane rubber 46 can adjust its height difference according to the shape of the rubber bottom plate 8, and can adapt to the rubber bottom plate 8 with different height differences, so that the soft rubber tentacle 41 and the high-sensitivity pressure sensor 39 can effectively contact the ground. Inside the adjusting cylinder 33, the rolling ball 57 can rotate in the conical shell 53. During the downward pressing process, the rotation of the rolling ball 57 can drive the connecting rod 54 to move.The connection seat 55 can drive the polyurethane rubber 46 to change according to the angle of the soft rubber bottom plate 8. On this basis, the connection seat 55 can drive the styrene-butadiene rubber plate 45 and the polyurethane rubber 46 to continue to press downward. The styrene-butadiene rubber plate 45 and the polyurethane rubber 46 themselves have certain toughness and strength, and can deform with the downward pressure to tightly press the soft rubber bottom plate 8. If the soft rubber bottom plate 8 is affected by the terrain and is in a V-shape as a whole, the conical column 59 and the nitrile rubber block 44 at the bottom are pressed down by the connection seat 55, so that the nitrile rubber block 44 acts on the soft rubber bottom plate 8 as a whole, exerting pressure on it, and the styrene-butadiene rubber The plate 45 and the polyurethane rubber 46 can also be subjected to the continuous inward pressure of the first return spring 56 to tightly clamp the side of the soft rubber bottom plate 8, and the soft rubber bottom plate 8 is tightly fitted. If the soft rubber bottom plate 8 is relatively concave due to the influence of the terrain, the styrene-butadiene rubber plate 45 and the polyurethane rubber 46 are directly pressed together by the downward force of the connecting seat 55. The middle parts of the styrene-butadiene rubber plate 45 and the polyurethane rubber 46 are connected by the silicone rubber strip 52 and the butadiene rubber block 61. Therefore, the polyurethane rubber 46 will flip outward to the outside of the styrene-butadiene rubber plate 45 during the downward pressure, and the second buffer spring 49 at the top of the return shell 50 is used to press it. The pressure is adjusted to avoid excessive pressure that causes damage to the soft rubber bottom plate 8, and the soft rubber bottom plate 8 is fitted. In the process of further pressing downward, the nitrile rubber block 44 can directly press the depression in the middle of the soft rubber bottom plate 8 to ensure that the soft rubber tentacle 41 drives the high-sensitivity pressure sensor 39 to fit closely with the ground, further strengthening the pressing effect of the soft rubber tentacle 41 and the high-sensitivity pressure sensor 39, so as to more accurately capture the subtle pressure changes caused by leakage. The high-sensitivity pressure sensor 39 continuously detects the ground pressure information. If there is a leakage underground, the pressure change at the leakage will be detected by the high-sensitivity pressure sensor 39. The high-sensitivity pressure sensor 39 senses and captures. The high-sensitivity pressure sensor 39 directly transmits the detected pressure signal to the detector 11, which is then analyzed by the detector 11 and then transmitted to the controller 15. The controller 15 determines whether there is underground leakage based on the received pressure signal, combined with the preset algorithm and parameters, and comprehensively judges the ground leakage. When the detection is completed, the multi-stage electric telescopic rod 32 is directly reset, the position of the styrene-butadiene rubber plate 45 and the connecting seat 55 is reset by the first reset spring 56, and the polyurethane rubber 46 is reset by the silicone rubber strip 52 and the butadiene rubber block 61, and then the next detection point can be detected.

[0024] Based on Example 1, Example 2: Please refer to Figure 1 , pictures and Fig.12The present invention provides a technical solution: a leakage detection device for underground structures. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. An ion storage unit is arranged inside the detection platform 1. The ion storage unit is located on the left side of the adaptive pressure sensing unit. The ion storage unit is used to control the amount of ion solution. The ion storage unit includes a liquid storage tank 2. The outer surface of the liquid storage tank 2 is fixedly connected to the inner wall of the detection platform 1. The inner wall of the detection platform 1 is fixedly connected with an isolation plate 63. The bottom surface of the isolation plate 63 contacts the upper surface of the liquid storage tank 2. The isolation plate 63 is in contact with the upper surface of the liquid storage tank 2. The upper surfaces of the detection platform 1 are fixedly connected to the first ion storage box 62 and the two second ion storage boxes 20, respectively; the upper surface of the liquid storage box 2 is fixedly connected to three flow pipes 25, and one end of the three flow pipes 25 away from the liquid storage box 2 is fixedly connected to the left side surface of the first ion storage box 62 and the left side surfaces of the two second ion storage boxes 20, respectively; the left side of the liquid storage box 2 is fixedly connected to a drain pipe 19, and the outer surface of the drain pipe 19 is fixedly connected to a valve 21; the bottom surface of the detection platform 1 is fixedly connected to a connecting block 18, and the inner wall of the connecting block 18 is fixedly connected to the outer surface of the drain pipe 19.

[0025] Through the ion storage unit, according to the actual ground conditions, the corresponding ion solution can be poured out from different ion storage boxes to actively detect ground leakage. If the ground geology or possible leakage materials are different, specific ion solutions can be used for detection; See also Figure 2 and Fig.12 , a capacitive pressure sensor 24 is fixedly connected to the inner wall of the liquid storage tank 2, a vacuum pump 64 is fixedly connected to the inner wall of the detection platform 1, an exhaust pipe 23 is fixedly connected to the output end of the vacuum pump 64, and one end of the exhaust pipe 23 away from the vacuum pump 64 passes through the interior of the liquid storage tank 2, and four injection pipes 22 are arranged inside the detection platform 1, and the lower ends of the four injection pipes 22 are respectively fixedly connected to the upper surface of the liquid storage tank 2, the upper surface of the first ion storage tank 62, and the upper surfaces of the two second ion storage tanks 20, and the controller 15 is electrically connected to the capacitive pressure sensor 24 and the vacuum pump 64 through wires, and the output pressure inside the liquid storage tank 2 can be conveniently detected through the capacitive pressure sensor 24, so as to conveniently ensure the discharge of the ion solution; See also Figure 2 and Fig.13The inner wall of each moving rod 3 is fixedly connected with a first detection tube 5, the inner wall of each first detection tube 5 is fixedly connected with a first rubber stopper 69 and a first sensitive membrane 68, a first internal reference electrode 65 is arranged inside each first detection tube 5, the detection end of each first internal reference electrode 65 passes through the first rubber stopper 69 and the first sensitive membrane 68 in sequence and extends to the inside of the first detection tube 5, one end of each first detection tube 5 is fixedly connected with a first signal transmission line 67, the detector 11 is electrically connected to the first signal transmission line 67 through a wire, and through the first detection tube 5, the first rubber stopper 69, the first sensitive membrane 68, the first internal reference electrode 65 and the first signal transmission line 67, the adsorbed ions can be detected conveniently, thereby facilitating the positioning of ground leakage.

[0026] The specific implementation of this embodiment is as follows: when it is needed, the liquid storage tank 2 can conveniently store the ion solution, the first ion storage tank 62 and the two second ion storage tanks 20 can store different ion solutions, the liquid storage tank 2 is connected to the first ion storage tank 62 and the two second ion storage tanks 20 through three flow tubes 25 respectively, when it is necessary to add ion solution to the storage tank, the ion solution enters the corresponding ion storage tank from the liquid storage tank 2 through the flow tube 25, the drain pipe 19 on the left side of the liquid storage tank 2 is used to discharge the liquid in the liquid storage tank 2, the valve 21 can control the drainage volume, the connecting block 18 fixes the drain pipe 19 to the bottom surface of the detection platform 1 to ensure the stability of the drain pipe 19, the first detection tube 5 inside the moving rod 3 is the place for ion detection, the first rubber stopper 69 is located inside the first detection tube 5, plays a sealing role to prevent the internal detection solution from leaking, and at the same time provides support and sealing for the first internal reference electrode 65, The first sensitive membrane 68 can selectively allow specific ions to pass through. When there is leakage on the ground, ions in the leaked ion solution can enter the first detection tube 5 through the first sensitive membrane 68. The detection end of the first internal reference electrode 65 passes through the first rubber stopper 69 and the first sensitive membrane 68 and extends into the first detection tube 5 to detect the ions entering the tube. It obtains information such as ion concentration by electrochemical or physicochemical reactions with the ions in the tube. The first signal transmission line 67 at one end of the first detection tube 5 transmits the signal detected by the first internal reference electrode 65. These signals are transmitted to the detector 11 through the wire. The detector 11 can process and analyze the signal, and combine with the control logic of the controller 15 to locate the ground leakage. For example, according to the strength and type of the ion signal transmitted from the first detection tube 5 at different positions, the leakage position and information such as the ion composition in the leaking liquid can be judged.

[0027] Based on Example 2, Example 3: Please refer to Figure 1 , Fig.14 , Fig.17 , Fig.18 , Fig.19 and Fig. 20 The present invention provides a technical solution: a leakage detection device for underground structures. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. An ion active detection unit is arranged on the outside of the detection platform 1. The ion active detection unit is located on both sides of the ion storage unit. The ion active detection unit is used to quickly detect the ion solution. The front and back of the detection platform 1 are both hinged with a storage box 6 through a folding piece. The front and back of the detection platform 1 are both provided with a storage slot 4. The inner wall of each storage slot 4 is fixedly connected with a centrifuge 71 and a micro water pump 72. The interior of each centrifuge 71 is clamped with a separation tube 70. The input end and the output end of the micro water pump 72 are respectively fixedly connected with an inlet pipe 84 and an outlet pipe 84. The outer surface of the water pipe 85 and the water inlet pipe 84 is fixedly connected with a block 83, and the interior of the block 83 is clamped with the outer surface of the water inlet pipe 84. The interior of each storage box 6 is provided with an extension tube 80 and a sliding threaded tube 111. The outer surface of each extension tube 80 is provided with a preset pipe opening 79. The interior of each extension tube 80 and the interior of the sliding threaded tube 111 are jointly provided with an extension rod 106. The outer surface of each extension rod 106 is fixedly connected with an inner plate 104. The interior of each extension tube 80 and the interior of the sliding threaded tube 111 are jointly slidably connected to the outer surface of the extension rod 106 through the inner plate 104. The interior of each extension rod 106 is respectively provided with a docking cavity 113 and a power cavity 125. The inner wall of the power cavity 125 is respectively fixedly connected with a micro motor 110, a first sealed bearing 127 and a second sealed bearing 108, the output end of each micro motor 110 is fixedly connected with a transmission shaft 128, one end of each transmission shaft 128 is fixedly connected with a transmission gear 126, the inner ring of each first sealed bearing 127 is fixedly connected with a transmission disk 129, the outer surface of each transmission disk 129 is fixedly connected with three transmission rods 124, one end of each three transmission rods 124 is commonly fixedly connected with a main gear 118, the outer surface of each main gear 118 is fixedly connected with a transmission cylinder 109, the outer surface of the transmission cylinder 109 is fixedly connected to the inner ring of the second sealed bearing 108, and each transmission cylinder One end of 109 is fixedly connected to a sampling head 107, the inner wall of each sampling head 107 is fixedly connected to a third sealed bearing 119 and a sealing clamp ring 121, the inner ring of each third sealed bearing 119 is fixedly connected to a sampling tube 130, the outer surface of each sampling tube 130 is fixedly connected to a limiting ring 135, the outer surface of each limiting ring 135 is snap-fitted to the inside of the sealing clamp ring 121, the inner wall of each sampling head 107 is threadedly connected to a sealing plug 120, and one end of each sampling tube 130 away from the sampling head 107 passes through the transmission cylinder 109, the second sealed bearing 108, the main gear 118, the transmission disk 129 and the power chamber 125 in sequence and extends to the inside of the docking chamber 113.

[0028] By setting up an active ion detection unit, the detection efficiency can be further actively increased on the basis of passive plasma approach through a fixed electrode, and the sampling head 107 controlled by a mechanical structure can extract the underground infiltrated ion solution, and the sampling head 107 can be pre-punched to shuttle at different depths and directions to actively collect the ion solution in the suspected leakage area. Moreover, after sampling, the soil and interfering ions can be quickly filtered through the pretreatment cylinder 77, the centrifuge 71 and the filter cylinder 75 to increase the ion concentration, which can not only optimize the sample but also speed up the detection frequency, and further cooperate with the adaptive pressure sensing unit to increase the bottom surface leakage accuracy; See also Fig.16 and Fig.17 , the interior of each extension rod 106 is slidably connected with a protective tube 100, the inner wall of each protective tube 100 is fixedly connected with a docking tube 117, the outer surface of each sampling tube 130 and the outer surface of the docking tube 117 are fixedly connected with a connecting tube 131, the outer surfaces of every two connecting tubes 131 are fixedly connected with a fixing ring 132 and a threaded ring 116, the outer surface of each fixing ring 132 is fixedly connected to the inner wall of the docking cavity 113, the outer surface of each threaded ring 116 is threadedly connected to the inner wall of the docking cavity 113, the end of each sampling tube 130 away from the sampling head 107 is fixedly connected with a first conical docking joint 115, the end of each docking tube 117 close to the sampling head 107 is fixedly connected with a second conical docking joint 134, the outer surfaces of every two connecting tubes 131 are provided with a threaded groove 114, and the other two The outer surface of the connecting tube 131 is fixedly connected with two threaded docking rings 133, the outer surface of each extension rod 106 is provided with two positioning grooves 103, the outer surface of each sliding threaded tube 111 is provided with two reset ports 66, the inner wall of each reset port 66 is fixedly connected with two second reset springs 122, the tops of each two second reset springs 122 are commonly fixedly connected with a positioning plug 105, the outer surface of each sliding threaded tube 111 is threadedly connected with a sealing threaded tube 82, the outer surface of each sliding threaded tube 111 is fixedly connected with two limit rings 136, the outer surface of each extension tube 80 is threadedly connected with the inner wall of the sliding threaded tube 111, and the telescopic mechanism and the positioning structure can be used to conveniently control the length of the sampling head 107, so as to facilitate the sampling of ion solutions inside holes of different depths; See also Fig.14 , Fig.15 , Fig.16 and Fig.17, each storage box 6 is provided with a micro peristaltic pump 76 and a pretreatment cylinder 77 inside, the bottom surface of each micro peristaltic pump 76 is fixedly connected to the inner bottom wall of the storage box 6, the outer surface of each pretreatment cylinder 77 and the outer surface of the extension cylinder 80 are in contact with the inner wall of the storage box 6, the output end and the input end of each micro peristaltic pump 76 are respectively fixedly connected with a discharge pipe 73 and a connecting pipe 96, the inner wall of each pretreatment cylinder 77 is threadedly connected with a rotary cylinder 138, the inner wall of the rotary cylinder 138 is respectively fixedly connected with a coarse filter screen 99, a first metal braided filter screen 98 and a second metal braided filter screen 97, the end of the connecting pipe 96 away from the micro peristaltic pump 76 passes through the interior of the rotary cylinder 138, one end of each pretreatment cylinder 77 is fixedly connected with a sampling tube 81, and the inner wall of each sampling tube 81 is fixedly connected with a sampling tube 81. The outer surface of each sampling tube 81 is fixedly connected with a fixed head 102, the outer surface of each movable tube 78 is threadedly connected with a movable cartridge 101, the inner wall of each movable cartridge 101 is threadedly connected with the outer surface of the fixed head 102, one end of each movable tube 78 passes through the preset nozzle 79 to the interior of the extension tube 80, the inner wall of the movable tube 78 is fixedly connected with a fourth sealed bearing 112, the inner ring of each fourth sealed bearing 112 is fixedly connected with the outer surface of the butt tube 117, the controller 15 is electrically connected with the micro peristaltic pump 76, the centrifuge 71, the micro water pump 72 and the micro motor 110 through wires, and the sampled soil can be preliminarily filtered through the filtering structure to reduce the interference of the soil on the ion solution; See also Fig.14 , Fig.15 and Fig.16The inner wall of each storage box 6 is rotatably connected with a detection cylinder 7, the outer surface of each detection cylinder 7 is threadedly connected with a filter cylinder 75, the outer surface of each filter cylinder 75 is threadedly connected with a water inlet cylinder 74, and one end of each water outlet pipe 85 away from the micro water pump 72 passes through the interior of the water inlet cylinder 74, the inner wall of each detection cylinder 7 is fixedly connected with an arc seat 87, the inner wall of each arc seat 87 is fixedly connected with a second detection tube 86, the inner wall of each second detection tube 86 is fixedly connected with a second rubber stopper 95 and a second sensitive membrane 92, and a second internal reference electrode 94 is arranged inside each second detection tube 86, and the detection end of each second internal reference electrode 94 passes through the second rubber stopper 95 and the second sensitive membrane 92 in sequence and extends to the second Inside the detection tube 86, one end of each second detection tube 86 is fixedly connected to the second signal transmission line 93, one end of each second signal transmission line 93 passes through the detection tube 7 and extends to the outside of the detection tube 7, the inner wall of the detection tube 7 and the inner wall of the filter tube 75 are fixedly connected with annular sealing gaskets 91, the outer surfaces of the two annular sealing gaskets 91 are in contact with the inner wall of the detection tube 7 and the inner wall of the filter tube 75, the inner wall of the filter tube 75 is respectively fixedly connected with cellulose acetate filter membrane 90, nylon filter membrane 89 and polyvinylidene fluoride filter membrane 88, the detector 11 is electrically connected to the second signal transmission line 93 through a wire, and through secondary filtration and detection, ions can be directly detected, active detection effect is achieved, and detection efficiency is increased.

[0029] The specific implementation of this embodiment is as follows: when it is necessary to actively detect the ion solution, use the underground drilling device 13 to drill holes at and around the detection point. These holes provide channels for subsequent sampling and ion solution injection, so that the sampling head 107 can go deep into different depths and directions to collect samples, better cover the detection area, and ensure comprehensive detection of ground leakage. Pour an appropriate amount of ion solution into the drilled hole through the ion storage unit, and then fill it with soil to simulate the underground leakage environment, so that the ion solution can diffuse and penetrate in the soil, so that subsequent sampling and detection can more accurately reflect the actual leakage situation. When it is necessary to collect ion solution samples in holes of different depths, first adjust the height of the sampling head 107, and directly pull the extension tube 80 outward. The extension tube 80 is extended on the extension rod. 106 slides inside, and the extension rod 106 slides inside the extension tube 80 through the inner plate 104. When the extension tube 80 drives the sliding threaded tube 111 to reach the maximum position, it stops. At this time, the extension tube 111 needs to be positioned. The positioning plug 105 is located above the positioning groove 103. By rotating the sealing threaded tube 82, the sealing threaded tube 82 can rotate on the surface of the sliding threaded tube 111. Since the positioning plug 105 is connected to the reset port 66 through the second reset spring 122, when the sealing threaded tube 82 passes through the positioning plug 105, it can be pressed downward by the spherical structure on the top of the positioning plug 105. The positioning plug 105 can be subjected to pressure to compress the second reset spring 122 downward, and is directly clamped in the positioning groove 103 through the reset port 66. The positioning block 105 is located at the reset port 66 and the positioning groove 103 at the same time. At this time, the sliding threaded cylinder 111 is limited by the positioning block 105 and the positioning groove 103. In the power cavity 125 of the extension rod 106, the micro motor 110 is started, and the transmission gear 126 is driven to rotate through the transmission shaft 128. The transmission gear 126 is engaged with the main gear 118 to drive it to rotate. The main gear 118 can rotate stably inside the first sealed bearing 127 through the transmission disk 129 to ensure its stability. The sampling head 107 is driven to rotate through the transmission cylinder 109 to directly drill the pre-buried soil. During the drilling process, the sampling port of the sampling head 107 can be sealed through the sealing plug 120 to prevent soil from entering. When the drilling is completed, the micro motor 110 is closed. The motor 110 is turned on and the sampling head 107 is taken out, and the sealing plug 120 is taken out. At this time, the movable cartridge 101 is screwed out of the fixed head 102, and the movable tube 78 is first separated from the sampling tube 81, and then the extension tube 80 is rotated to make the extension tube 80 screw out of the sliding threaded tube 111, and the movable tube 78 can fall off through the preset tube mouth 79, so that the extension tube 80 is separated from the sliding threaded tube 111, and the docking tube 117 and the sampling tube 130 are directly docked at this time, and the protective tube 100 is directly rotated by hand, and the protective tube 100 directly drives the docking tube 117 to rotate, and the docking tube 117 can rotate inside the fourth sealing bearing 112 to avoid directly driving the movable tube 78 to swing during the rotation. The protective tube 100 is directly threadedly rotated in the docking cavity 113 through the threaded ring 116.During the rotation, the sampling tube 130 moves in the direction of the sampling tube 130, and the sampling tube 130 is docked with the second tapered docking joint 134 of the docking tube 117 through the first tapered docking joint 115 to form a sampling channel. After the docking is completed, the protective tube 100 is rotated to make the threaded docking ring 133 directly screw into the thread groove 114. During the rotation, the sampling personnel increases the rotation amplitude, and the sampling personnel is prompted to indicate successful docking. When the rotation stops, the sampling head 107 is inserted into the soil containing the ion solution. Under the action of the micro peristaltic pump 76, the ion solution is pumped into the soil. The soil is sequentially extracted into the rotary drum 138 through the sampling head 107, the sampling tube 130, the docking tube 117, the movable tube 78 and the sampling tube 81, and is initially filtered through the coarse filter 99, the first metal woven filter 98 and the second metal woven filter 97. After the filtration is completed, it is directly discharged into the separation tube 70 through the micro peristaltic pump 76 and the discharge pipe 73. According to the soil and ion conditions, a certain amount of added water, buffer solution, chelating agent solution or organic solution is added into the separation tube 70, so that the soil can be directly precipitated with impurities in the soil under the centrifugal process, and the impurities in the soil are separated. After that, the separation tube 70 is directly connected through the water inlet pipe 84 to discharge the mixed ion solution into the water inlet cylinder 74. The ion solution is further filtered through the polyvinylidene fluoride filter membrane 88, the nylon filter membrane 89 and the cellulose acetate filter membrane 90 in turn to further filter the smaller impurities in the ion solution, and then enters the second detection tube 86 through the second sensitive membrane 92. The detection end of the second internal reference electrode 94 passes through the second rubber stopper 95 and the second sensitive membrane 92 and extends into the second detection tube 86 to detect the ions entering the tube. It reacts electrochemically or physicochemically with the ions in the tube. The second signal transmission line 93 at one end of the second detection tube 86 transmits the signal detected by the second internal reference electrode 94, and these signals are transmitted to the detector 11 through the wire. The detector 11 can process and analyze the signal, and combine the control logic of the controller 15 to locate the ground leakage. For example, according to the strength and type of the ion signal transmitted by the first detection tube 5 at different positions, the leakage position and the ion composition in the leaking liquid can be determined. Multiple points can be detected, which is convenient for increasing the detection efficiency of ground leakage.

[0030] Working principle: When in use, first connect the multi-stage electric telescopic rod 32, capacitive pressure sensor 24, vacuum pump 64, micro peristaltic pump 76, centrifuge 71, micro water pump 72 and micro motor 110 to an external power source. When it is necessary to detect ground leakage through the adaptive pressure sensing unit, the device as a whole is in the initial position below the detection platform 1, and the multi-stage electric telescopic rod 32 drives the entire device to move downward. The soft rubber tentacle 41 stops after contacting the ground. Since the soft rubber tentacle 41 is movably hinged on the fixed plate 38 and is compressible, when it contacts a complex underground surface, such as soil or rock gaps, the soft rubber tentacle 41 will stretch and bend according to the irregular shape of the ground to fit the ground as much as possible. Due to the high sensitivity The high-sensitivity pressure sensor 39 is arranged at the bottom of the soft rubber tentacle 41. The high-sensitivity pressure sensor 39 is directly in close contact with the ground. The high-sensitivity pressure sensor 39 directly senses the pressure of the ground. At the same time, the rubber bottom plate 8 drops as the soft rubber tentacle 41 presses down. Since the rubber bottom plate 8 itself has a relatively large elasticity, it can cooperate with the soft rubber tentacle 41 to contact the ground and press the soft rubber tentacle 41. The first tension spring 42 between the rubber bottom plate 8 and the top plastic layer 9 is stretched, and the rubber pull strip 37 is also deformed with the shape of the rubber bottom plate 8 and different drop heights, so that the rubber bottom plate 8 can better adapt to terrain changes and provide stable support for the soft rubber tentacle 41. Then, the first-stage telescopic end of the multi-stage electric telescopic rod 32 continues to push the telescopic head 27, through The telescopic head 27 drives the connecting column 28, the connecting plate 139, the step plate 140 and the movable plate 141 to move downward in sequence, and directly drives the bottom steel wire 29 to descend through the movable plate 141. The steel wire 29 can extend directly through the opening between the supporting foot 31 and the conical plate 34 through the bottom auxiliary ball 30. Since the length of the steel wire 29 decreases from the outside to the inside, the steel wire 29 can directly press the action inside evenly onto the surface of the top plastic layer 9, preliminarily compressing the soft rubber tentacle 41 and the high-sensitivity pressure sensor 39 so that they can better fit the ground, and the sliding block 123 slides inside the sliding opening 137 and extends a part of it into the sleeve 16. While the telescopic head 27 is pressed down, the telescopic head 27 can directly drive the four pressing blocks 26 to press the bottom of the sleeve 16. The four sliding blocks 123 are pressed down, and the transmission plate 17 is pressed down through the sliding blocks 123, and the pressure plate 10 is pressed down as a whole through the transmission plate 17, and then the adjusting cylinder 33 is directly driven to move downward through the pressure plate 10. The adjusting cylinder 33 can slide downward in the through-port 36, and the reset shell 50 is kept steadily descending in the adjusting cylinder 33 through the cooperation of the balancing block 51 and the balancing groove 48. When the polyurethane rubber 46 contacts the rubber bottom plate 8, it directly generates pressure on it. Since the adjusting cylinder 33 is slidably connected with the inside of the pressure plate 10, the polyurethane rubber 46 can adjust the height difference of the rubber bottom plate 8 according to the shape of the rubber bottom plate 8, and can adapt to the rubber bottom plates 8 with different height differences, so that the soft rubber tentacles 41 and the high-sensitivity pressure sensor 39 can effectively contact the ground.Inside the adjusting cylinder 33, the ball 57 can rotate in the conical shell 53. During the downward pressing process, the rotation of the ball 57 can drive the connecting rod 54 to move, so that the connecting seat 55 can drive the polyurethane rubber 46 to change according to the angle of the soft rubber bottom plate 8. On this basis, the styrene-butadiene rubber plate 45 and the polyurethane rubber 46 can be driven to continue to be pressed down through the connecting seat 55. The styrene-butadiene rubber plate 45 and the polyurethane rubber 46 themselves have a certain toughness and strength, and can be deformed with the downward pressure to tightly press the soft rubber bottom plate 8. If the soft rubber bottom plate 8 is affected by the terrain and is in a V-shape as a whole, the conical column 59 and the nitrile rubber block 44 at the bottom are pressed down through the connecting seat 55, so that the nitrile rubber block 44 acts on the soft rubber bottom plate 8 as a whole. , applying pressure thereto, and the styrene-butadiene rubber sheet 45 and the polyurethane rubber 46 can also be subjected to the continuous inward pressure of the first return spring 56 to tightly clamp the side of the soft rubber bottom plate 8, and fit the soft rubber bottom plate 8 tightly. If the soft rubber bottom plate 8 is relatively concave due to the influence of the terrain, the styrene-butadiene rubber sheet 45 and the polyurethane rubber 46 are directly pressed together by the downward force of the connecting seat 55. The middle parts of the styrene-butadiene rubber sheet 45 and the polyurethane rubber 46 are connected by the silicone rubber strip 52 and the butadiene rubber block 61. Therefore, the polyurethane rubber 46 will flip outward to the outside of the styrene-butadiene rubber sheet 45 during the downward pressing process, and the pressure thereof is adjusted by the second buffer spring 49 at the top of the return shell 50 to avoid excessive pressure, which may cause damage to the soft rubber bottom plate 8. The soft rubber bottom plate 8 is fitted, and in the process of further pressing downward, the nitrile rubber block 44 can directly press the depression in the middle of the soft rubber bottom plate 8, ensuring that the soft rubber tentacle 41 drives the high-sensitivity pressure sensor 39 to fit closely with the ground, further strengthening the pressing effect of the soft rubber tentacle 41 and the high-sensitivity pressure sensor 39, so as to more accurately capture the subtle pressure changes caused by leakage. The high-sensitivity pressure sensor 39 continuously detects the ground pressure information. If there is leakage underground, the pressure change at the leakage will be sensed and captured by the high-sensitivity pressure sensor 39. The high-sensitivity pressure sensor 39 directly transmits the detected pressure signal to the detector 11, which is then transmitted to the controller 15 after analysis by the detector 11. The controller 15 determines whether there is underground leakage according to the received pressure signal, combined with the preset algorithm and parameters, and comprehensively determines the ground leakage. When the detection is completed, the multi-stage electric telescopic rod 32 is directly reset, the position of the styrene-butadiene rubber plate 45 and the connecting seat 55 is reset by the first reset spring 56, and the polyurethane rubber 46 is reset by the silicone rubber strip 52 and the butadiene rubber block 61, and then the next detection point is detected. The liquid storage tank 2 can conveniently store ion solutions. The first ion storage tank 62 and the two second ion storage tanks 20 can store different ion solutions. The liquid storage tank 2 is connected to the first ion storage tank 62 and the two second ion storage tanks 20 through three flow pipes 25. When it is necessary to replenish ion solutions in the storage tanks,The ion solution enters the corresponding ion storage tank from the liquid storage tank 2 through the circulation pipe 25. The drain pipe 19 on the left side of the liquid storage tank 2 is used to discharge the liquid in the liquid storage tank 2. The valve 21 can control the drainage volume. The connecting block 18 fixes the drain pipe 19 to the bottom surface of the detection platform 1 to ensure the stability of the drain pipe 19. The first detection tube 5 inside the moving rod 3 is the place for ion detection. The first rubber stopper 69 is located inside the first detection tube 5 to seal and prevent the internal detection solution from leaking. At the same time, it provides support and sealing for the first internal reference electrode 65. The first sensitive membrane 68 can selectively allow specific ions to pass through. When there is leakage on the ground, the ions in the leaked ion solution can enter the first detection tube 5 through the first sensitive membrane 68. The first internal reference electrode The detection end of the electrode 65 passes through the first rubber stopper 69 and the first sensitive membrane 68 and extends into the first detection tube 5, and is used to detect the ions entering the tube. It obtains information such as ion concentration by electrochemical or physicochemical reactions with the ions in the tube. The first signal transmission line 67 at one end of the first detection tube 5 transmits the signals detected by the first internal reference electrode 65, and these signals are transmitted to the detector 11 through the wire. The detector 11 can process and analyze the signals, and combine with the control logic of the controller 15 to locate the ground leakage. For example, according to the strength and type of the ion signals transmitted from the first detection tube 5 at different positions, the leakage position and the ion composition in the leaking liquid and other information can be judged. When it is necessary to actively detect the ion solution, the ground is used. The lower drilling device 13 drills holes at and around the detection point. These holes provide channels for subsequent sampling and ion solution injection, so that the sampling head 107 can collect samples at different depths and directions, better cover the detection area, and ensure comprehensive detection of ground leakage. An appropriate amount of ion solution is poured into the drilled hole through the ion storage unit, and then filled with soil to simulate the underground leakage environment, allowing the ion solution to diffuse and penetrate in the soil, so that subsequent sampling and detection can more accurately reflect the actual leakage situation. When it is necessary to collect ion solution samples in holes of different depths, first adjust the height of the sampling head 107, directly pull the extension tube 80 outward, and the extension tube 80 slides inside the extension rod 106. The extension rod 106 passes through the inner plate 104 inside the extension tube 80. When the extension tube 80 drives the sliding threaded tube 111 to reach the maximum position and then stops, the extension tube 111 needs to be positioned. The positioning plug 105 is located above the positioning groove 103. By rotating the sealing threaded tube 82, the sealing threaded tube 82 can be threadedly rotated on the surface of the sliding threaded tube 111. Since the positioning plug 105 is connected to the inside of the reset port 66 through the second reset spring 122, when the sealing threaded tube 82 passes through the positioning plug 105, it can be pressed downward by the spherical structure on the top of the positioning plug 105. The positioning plug 105 can be compressed downward by the pressure of the second reset spring 122, and is directly connected to the inside of the positioning groove 103 through the reset port 66. The positioning plug 105 is located at the reset port 66 and the positioning groove 103 at the same time.At this time, the sliding threaded cylinder 111 is limited by the positioning plug 105 and the positioning groove 103, and the micro motor 110 is started in the power cavity 125 of the extension rod 106. The transmission shaft 128 drives the transmission gear 126 to rotate, and the transmission gear 126 engages with the main gear 118 to drive it to rotate. The main gear 118 can rotate stably inside the first sealed bearing 127 through the transmission disk 129 to ensure its stability. The sampling head 107 is driven to rotate through the transmission cylinder 109 to directly drill the pre-buried soil. During the drilling process, the sampling port of the sampling head 107 can be sealed by the sealing plug 120 to prevent soil from entering. When the drilling is completed, the micro motor 110 is turned off and the sampling head 107 is taken out. The sealing plug 120 is out, and the movable cartridge 101 is screwed out of the fixed head 102 at this time, and the movable tube 78 is first separated from the sampling tube 81, and then the extension tube 80 is rotated to make the extension tube 80 screwed out of the sliding threaded tube 111, and the movable tube 78 can fall off through the preset tube mouth 79, so that the extension tube 80 is separated from the sliding threaded tube 111, and the docking tube 117 and the sampling tube 130 are directly docked at this time, and the protective cylinder 100 is directly rotated by hand, and the protective cylinder 100 directly drives the docking tube 117 to rotate, and the docking tube 117 can rotate inside the fourth sealing bearing 112 to avoid directly driving the movable tube 78 to swing during the rotation. The protective cylinder 100 is directly threadedly rotated in the docking cavity 113 through the threaded ring 116, and during the rotation During the process of rotation, the sampling head 107 moves toward the sampling tube 130, and the sampling tube 130 is docked with the second tapered docking head 134 of the docking tube 117 through the first tapered docking head 115 to form a sampling channel. After the docking is completed, the protective tube 100 is rotated to make the threaded docking ring 133 directly screwed into the thread groove 114. During the rotation, the sampling personnel increases the rotation amplitude, and the sampling personnel is prompted to indicate successful docking. When the rotation stops, the sampling head 107 is inserted into the soil containing the ion solution. Under the action of the micro peristaltic pump 76, the soil containing the ion solution is extracted into the inside of the rotary cylinder 138 through the sampling head 107, the sampling tube 130, the docking tube 117, the movable tube 78 and the sampling tube 81 in sequence, and passes through the coarse filter 99, the first filter screen 99, the second ... A metal woven filter 98 and a second metal woven filter 97 are used for preliminary filtration. After the filtration is completed, the ion solution is directly discharged into the separation tube 70 through the micro peristaltic pump 76 and the discharge pipe 73. A certain amount of added water, buffer solution, chelating agent solution or organic solution is added into the separation tube 70 according to the soil and ion conditions, so that the soil can directly precipitate impurities in the soil under the centrifugal process. After separation, the separation tube 70 is directly connected through the water inlet pipe 84, and the mixed ion solution is discharged into the water inlet cylinder 74. The ion solution is further filtered through the polyvinylidene fluoride filter membrane 88, the nylon filter membrane 89 and the cellulose acetate filter membrane 90 in turn to further filter the smaller impurities in the ion solution, and then enters the second detection tube 86 through the second sensitive membrane 92.The detection end of the second internal reference electrode 94 passes through the second rubber stopper 95 and the second sensitive membrane 92 and extends into the second detection tube 86 to detect the ions entering the tube. It obtains information such as ion concentration by reacting electrochemically or physicochemically with the ions in the tube. The second signal transmission line 93 at one end of the second detection tube 86 transmits the signal detected by the second internal reference electrode 94. These signals are transmitted to the detector 11 through the wire. The detector 11 can process and analyze the signal and locate the ground leakage in combination with the control logic of the controller 15. For example, according to the strength and type of the ion signal transmitted from the first detection tube 5 at different positions, the leakage position and the ion composition in the leaking liquid can be determined. Multiple points can be detected, and the adaptive pressure sensing unit can be used to further increase the detection efficiency of ground leakage, avoid the situation where hidden leakage points are difficult to detect, the detection accuracy is low, and the efficiency is low. Different from lossy sampling detection, this detection structure can effectively detect underground leakage in a relatively large range by drilling a small number of holes, thereby increasing the detection efficiency.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leakage detection device for an underground structure, comprising a detection platform (1), characterized in that: The upper surface of the detection platform (1) is fixedly connected to a controller (15) and a tool platform (12), the front and back surfaces of the detection platform (1) are fixedly connected to detectors (11), the bottom surface of the detection platform (1) is fixedly connected to two groups of moving rods (3) and a multi-stage electric telescopic rod (32), and the interior of the tool platform (12) is respectively clamped with underground drilling equipment (13) and three drill bits (14); An adaptive pressure sensing unit is provided below the detection platform (1), the adaptive pressure sensing unit is located below the multi-stage electric telescopic rod (32), and the adaptive pressure sensing unit is used to detect ground leakage within a certain range; An ion storage unit is arranged inside the detection platform (1), the ion storage unit is located on the left side of the adaptive pressure sensing unit, and the ion storage unit is used to control the amount of ion solution; An active ion detection unit is arranged on the outside of the detection platform (1), the active ion detection unit is located on both sides of the ion storage unit, and the active ion detection unit is used to quickly detect the ion solution.

2. The underground structure leakage detection device according to claim 1, characterized in that: The adaptive pressure sensing unit comprises a sleeve (16), the bottom surface of the sleeve (16) is fixedly connected to a plurality of identical supporting feet (31), the interior of the sleeve (16) is slidably connected to a telescopic head (27), the top end of the sleeve (16) and the top end of the telescopic head (27) are respectively fixedly connected to two telescopic ends of a multi-stage electric telescopic rod (32), the bottom surface of the telescopic head (27) is fixedly connected to a connecting column (28), the outer surface of the connecting column (28) is fixedly connected to twelve connecting plates (139), and the bottom surface of each connecting plate (139) is movably hinged to a group of steps. The bottom surface of each group of the step plates (140) is fixedly connected to a group of movable plates (141), the bottom surface of each group of the movable plates (141) is fixedly connected to five steel wires (29), the bottom end of each of the steel wires (29) is fixedly connected to an auxiliary ball (30), the outer surface of the telescopic head (27) is fixedly connected to four lower pressing blocks (26), a plastic top layer (9) is arranged below the detection platform (1), the upper surface of the plastic top layer (9) is provided with a plurality of identical through openings (36), the upper surface of the plastic top layer (9) is fixedly connected to a conical plate (34), each The outer surfaces of the bottom ends of the support feet (31) are fixedly connected to the inner wall of the conical plate (34); the bottom surface of the plastic top layer (9) is fixedly connected to twelve groups of U-shaped hooks (43); the outer surface of each group of the U-shaped hooks (43) is clamped with seven first tension springs (42); the bottom surface of the plastic top layer (9) is fixedly connected to a fixing plate (38); the outer surface of the fixing plate (38) is fixedly connected to twelve rubber bottom plates (8); the outer surfaces of every two of the rubber bottom plates (8) are fixedly connected to three rubber pull strips (37); the upper surface of each of the rubber bottom plates (8) is clamped with the seven first tension springs (42). The bottom end of the extension spring (42) is fixedly connected, the bottom surface of each of the rubber bottom plates (8) is clamped with four connecting pieces (40), the internal movable hinge of the fixed plate (38) is provided with twelve soft rubber tentacles (41), the outer surface of each of the soft rubber tentacles (41) is fixedly connected to the bottom end of the connecting piece (40), the outer surface of each of the soft rubber tentacles (41) is fixedly connected to a plurality of identical high-sensitivity pressure sensors (39), and the controller (15) is electrically connected to the multi-stage electric telescopic rod (32), the high-sensitivity pressure sensor (39) and the detector (11) through wires.

3. The underground structure leakage detection device according to claim 2, characterized in that: Six first buffer springs (35) are fixedly connected to the upper surface of the plastic top layer (9), and the top ends of the six first buffer springs (35) are fixedly connected to a pressure plate (10). Four transmission plates (17) are fixedly connected to the upper surface of the pressure plate (10), and one end of each transmission plate (17) is fixedly connected to a sliding block (123). Two sliding openings (137) are formed on the outer surface of the sleeve (16), and the outer surface of each sliding block (123) is slidably connected to the inside of the sliding opening (137). The inside of each pressure plate (10) is slidably connected to an adjustment cylinder (33) via a slider (47). The interior of each through hole (36) is slidably connected to the outer surface of the adjustment cylinder (33); the inner top wall of each adjustment cylinder (33) is fixedly connected to a second buffer spring (49); the bottom end of the second buffer spring (49) is fixedly connected to a reset shell (50); the inner wall of the adjustment cylinder (33) is provided with six balancing grooves (48); the outer surface of the reset shell (50) is fixedly connected to six balancing blocks (51); the outer surface of each balancing block (51) is slidably connected to the interior of the balancing groove (48); the inner top wall of the reset shell (50) is fixedly connected to a conical shell (53); the inner wall of the conical shell (53) is rotated A rolling ball (57) is connected, the outer surface of the rolling ball (57) is fixedly connected to a connecting rod (54), the bottom end of the connecting rod (54) is fixedly connected to a connecting seat (55), the bottom surface of the connecting seat (55) is fixedly connected to a conical column (59), the bottom end of the conical column (59) is fixedly connected to a nitrile rubber block (44), the inner wall of the connecting seat (55) is fixedly connected to four inclined plates (58), the inner wall of each connecting seat (55) is movably hinged to a styrene-butadiene rubber plate (45), the outer surface of each styrene-butadiene rubber plate (45) is in contact with the outer surface of the inclined plate (58), and the outer surface of each styrene-butadiene rubber plate (45) is in contact with the outer surface of the inclined plate (58). The surfaces of the first return springs (56) are fixedly connected to the inner wall of the return shell (50); polyurethane rubber (46) is arranged below each of the styrene-butadiene rubber plates (45); the outer surface of each of the polyurethane rubbers (46) is fixedly connected to a plurality of identical arc-shaped balls (60); the outer surface of each of the polyurethane rubbers (46) is fixedly connected to five cis-butyl rubber blocks (61) and four silicone rubber strips (52); the outer surface of each of the polyurethane rubbers (46) is fixedly connected to the bottom surface of the styrene-butadiene rubber plate (45); and the outer surface of each of the silicone rubber strips (52) is fixedly connected to the outer surface of the styrene-butadiene rubber plate (45).

4. The leakage detection device for underground structure according to claim 1, characterized in that: The ion storage unit comprises a liquid storage tank (2), the outer surface of the liquid storage tank (2) being fixedly connected to the inner wall of the detection platform (1), the inner wall of the detection platform (1) being fixedly connected to an isolation plate (63), the bottom surface of the isolation plate (63) being in contact with the upper surface of the liquid storage tank (2), the upper surface of the isolation plate (63) being respectively fixedly connected to a first ion storage tank (62) and two second ion storage tanks (20), and the upper surface of the liquid storage tank (2) being fixedly connected to three flow pipes (25) The ends of the three flow tubes (25) away from the liquid storage tank (2) are fixedly connected to the left side surface of the first ion storage tank (62) and the left side surfaces of the two second ion storage tanks (20), respectively; the left side surface of the liquid storage tank (2) is fixedly connected to a drain pipe (19); the outer surface of the drain pipe (19) is fixedly connected to a valve (21); the bottom surface of the detection platform (1) is fixedly connected to a connection block (18); the inner wall of the connection block (18) is fixedly connected to the outer surface of the drain pipe (19).

5. The underground structure leakage detection device according to claim 4, characterized in that: The inner wall of the liquid storage tank (2) is fixedly connected to a capacitive pressure sensor (24); the inner wall of the detection platform (1) is fixedly connected to a vacuum pump (64); the output end of the vacuum pump (64) is fixedly connected to an exhaust pipe (23); one end of the exhaust pipe (23) away from the vacuum pump (64) passes through the interior of the liquid storage tank (2); four injection pipes (22) are arranged inside the detection platform (1); the lower ends of the four injection pipes (22) are respectively fixedly connected to the upper surface of the liquid storage tank (2), the upper surface of the first ion storage tank (62), and the upper surfaces of the two second ion storage tanks (20); and the controller (15) is respectively electrically connected to the capacitive pressure sensor (24) and the vacuum pump (64) through wires.

6. The underground structure leakage detection device according to claim 1, characterized in that: The inner wall of each of the moving rods (3) is fixedly connected to a first detection tube (5), the inner wall of each of the first detection tubes (5) is fixedly connected to a first rubber stopper (69) and a first sensitive membrane (68), a first internal reference electrode (65) is arranged inside each of the first detection tubes (5), the detection end of each of the first internal reference electrodes (65) passes through the first rubber stopper (69) and the first sensitive membrane (68) in sequence and extends to the inside of the first detection tube (5), one end of each of the first detection tubes (5) is fixedly connected to a first signal transmission line (67), and the detector (11) is electrically connected to the first signal transmission line (67) through a wire.

7. The underground structure leakage detection device according to claim 1, characterized in that: The front and back sides of the testing platform (1) are both movably hinged with a storage box (6) through folding parts. The front and back sides of the testing platform (1) are both provided with a storage slot (4). The inner wall of each storage slot (4) is fixedly connected with a centrifuge (71) and a micro water pump (72). The interior of each centrifuge (71) is clamped with a separation tube (70). The input end and the output end of the micro water pump (72) are respectively fixedly connected with a water inlet pipe (84) and a water outlet pipe (85). The outer surface of the water inlet pipe (84) is fixedly connected with a clamping block (83). The interior of the clamping block (83) is clamped with the outer surface of the water inlet pipe (84). The interior of each storage box (6) is provided with an extension tube. (80) and a sliding threaded cylinder (111), the outer surface of each of the extension cylinders (80) is provided with a preset pipe opening (79), the interior of each of the extension cylinders (80) and the interior of the sliding threaded cylinder (111) are both provided with an extension rod (106), the outer surface of each of the extension cylinders (106) is fixedly connected to an inner plate (104), the interior of each of the extension cylinders (80) and the interior of the sliding threaded cylinder (111) are both slidably connected to the outer surface of the extension rod (106) through the inner plate (104), the interior of each of the extension cylinders (106) is respectively provided with a docking cavity (113) and a power cavity (125), and the inner wall of each of the power cavities (125) is respectively fixedly connected to the inner plate (104). A micro motor (110), a first sealed bearing (127) and a second sealed bearing (108) are connected, the output end of each micro motor (110) is fixedly connected to a transmission shaft (128), one end of each transmission shaft (128) is fixedly connected to a transmission gear (126), the inner ring of each first sealed bearing (127) is fixedly connected to a transmission disk (129), the outer surface of each transmission disk (129) is fixedly connected to three transmission rods (124), one end of each of the three transmission rods (124) is commonly fixedly connected to a main gear (118), the outer surface of each main gear (118) is fixedly connected to a transmission cylinder (109), and the transmission The outer surface of the moving cylinder (109) is fixedly connected to the inner ring of the second sealed bearing (108); one end of each of the driving cylinders (109) is fixedly connected to a sampling head (107); the inner wall of each of the sampling heads (107) is fixedly connected to a third sealed bearing (119) and a sealing clamp (121); the inner ring of each of the third sealed bearings (119) is fixedly connected to a sampling tube (130); the outer surface of each of the sampling tubes (130) is fixedly connected to a limiting ring (135); the outer surface of each of the limiting rings (135) is clamped to the inside of the sealing clamp (121); the inner wall of each of the sampling heads (107) is threadedly connected to a sealing plug (120);One end of each sampling tube (130) away from the sampling head (107) passes through the transmission cylinder (109), the second sealed bearing (108), the main gear (118), the transmission disc (129) and the power chamber (125) in sequence and extends to the interior of the docking chamber (113).

8. The underground structure leakage detection device according to claim 7, characterized in that: The interior of each extension rod (106) is slidably connected to a protective tube (100), the inner wall of each protective tube (100) is fixedly connected to a docking tube (117), the outer surface of each sampling tube (130) and the outer surface of the docking tube (117) are fixedly connected to a connecting tube (131), the outer surfaces of every two connecting tubes (131) are fixedly connected to a fixing ring (132) and a threaded ring (116), the outer surface of each fixing ring (132) is fixedly connected to the inner wall of the docking cavity (113), the outer surface of each threaded ring (116) is threadedly connected to the inner wall of the docking cavity (113), the end of each sampling tube (130) away from the sampling head (107) is fixedly connected to a first conical docking joint (115), the end of each docking tube (117) close to the sampling head (107) is fixedly connected to a second conical docking joint (134), and the outer surfaces of every two connecting tubes (131) are fixedly connected to a fixing ring (132) and a threaded ring (116). The outer surface of each of the connecting tubes (131) is provided with a thread groove (114); the outer surfaces of the other two connecting tubes (131) are fixedly connected to two threaded docking rings (133); the outer surface of each of the extension rods (106) is provided with two positioning grooves (103); the outer surface of each of the sliding threaded tubes (111) is provided with two reset ports (66); the inner wall of each of the reset ports (66) is fixedly connected to two second reset springs (122); the top ends of each of the two second reset springs (122) are fixedly connected to a positioning plug (105); the outer surface of each of the sliding threaded tubes (111) is threadedly connected to a sealing threaded tube (82); the outer surface of each of the sliding threaded tubes (111) is fixedly connected to two limiting rings (136); and the outer surface of each of the extension tubes (80) is threadedly connected to the inner wall of the sliding threaded tube (111).

9. The underground structure leakage detection device according to claim 7, characterized in that: Each of the storage boxes (6) is provided with a micro peristaltic pump (76) and a pretreatment cylinder (77). The bottom surface of each of the micro peristaltic pumps (76) is fixedly connected to the inner bottom wall of the storage box (6). The outer surface of each of the pretreatment cylinders (77) and the outer surface of the extension cylinder (80) are in contact with the inner wall of the storage box (6). The output end and the input end of each of the micro peristaltic pumps (76) are respectively fixedly connected to a discharge pipe (73) and a connecting pipe (96). The inner wall of each of the pretreatment cylinders (77) is threadedly connected to a rotary cylinder (138). The inner wall of the rotary cylinder (138) is respectively fixedly connected to a coarse filter screen (99), a first metal braided filter screen (98) and a second metal braided filter screen (97). One end of the connecting pipe (96) away from the micro peristaltic pump (76) passes through the interior of the rotary cylinder (138). One end of each of the pretreatment cylinders (77) is fixedly connected to a rotary cylinder (138). A sampling tube (81) is provided, each sampling tube (81) is clamped with a movable tube (78) inside, the outer surface of each sampling tube (81) is fixedly connected to a fixed head (102), the outer surface of each movable tube (78) is threadedly connected to a movable cartridge (101), the inner wall of each movable cartridge (101) is threadedly connected to the outer surface of the fixed head (102), one end of each movable tube (78) passes through a preset pipe opening (79) to the inside of the extension tube (80), the inner wall of the movable tube (78) is fixedly connected to a fourth sealed bearing (112), the inner ring of each fourth sealed bearing (112) is fixedly connected to the outer surface of the butt tube (117), and the controller (15) is electrically connected to the micro peristaltic pump (76), the centrifuge (71), the micro water pump (72) and the micro motor (110) respectively through wires.

10. The underground structure leakage detection device according to claim 9, characterized in that: The inner wall of each storage box (6) is rotatably connected to a detection cylinder (7), the outer surface of each detection cylinder (7) is threadedly connected to a filter cylinder (75), the outer surface of each filter cylinder (75) is threadedly connected to a water inlet cylinder (74), one end of each water outlet pipe (85) away from the micro water pump (72) passes through the interior of the water inlet cylinder (74), the inner wall of each detection cylinder (7) is fixedly connected to an arc seat (87), the inner wall of each arc seat (87) is fixedly connected to a second detection tube (86), the inner wall of each second detection tube (86) is fixedly connected to a second rubber stopper (95) and a second sensitive membrane (92), the interior of each second detection tube (86) is provided with a second internal reference electrode (94), and the detection end of each second internal reference electrode (94) passes through the first and second detection tubes (86) in sequence. The second rubber stopper (95) and the second sensitive membrane (92) extend to the interior of the second detection tube (86); one end of each of the second detection tubes (86) is fixedly connected to a second signal transmission line (93); one end of each of the second signal transmission lines (93) passes through the detection cylinder (7) and extends to the outside of the detection cylinder (7); the inner wall of the detection cylinder (7) and the inner wall of the filter cylinder (75) are fixedly connected to an annular sealing gasket (91); the outer surfaces of the two annular sealing gaskets (91) are in contact with the inner wall of the detection cylinder (7) and the inner wall of the filter cylinder (75); the inner wall of the filter cylinder (75) is fixedly connected to a cellulose acetate filter membrane (90), a nylon filter membrane (89) and a polyvinylidene fluoride filter membrane (88); and the detector (11) is electrically connected to the second signal transmission line (93) via a wire.

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