A vertical cutoff wall pool body leakage detection device based on arc method

Abstract

The utility model discloses a vertical cutoff wall pool body leakage detection device based on arc method, including the fixed ground electrode of the pool wall anti -infiltration membrane outside setting in the pool body inner wall laying, the detection car of walking along the pool body inner wall through the traction and current detection module, be equipped with the rolling electrode that rolls along the pool body inner wall on the detection car, the rolling electrode continuously contacts the pool wall anti -infiltration membrane inside surface in the detection car walking process, the fixed ground electrode is connected in the power module two poles through electricity with the rolling electrode on the detection car, the rolling electrode with the fixed ground electrode forms the loop when passing through the pool wall anti -infiltration membrane breakage and is detected car, the current detection module is accessed the loop between the fixed ground electrode and the rolling electrode, be equipped with the traction rod for the traction detection car walking on the detection car. The utility model is applicable to the pool wall anti -infiltration membrane leakage detection with vertical cutoff wall, has reduced the detection intensity, and the detection process is convenient and efficient.

Description

Technical Field

[0001] This utility model discloses a leakage detection device for vertical anti-seepage wall pools based on the electric arc method, which relates to anti-seepage technology for anti-seepage walls. Background Technology

[0002] As a crucial barrier to prevent pollutant infiltration and protect groundwater resources, the integrity and effectiveness of geomembrane cutoff walls directly impact environmental protection and engineering safety. With increasing environmental awareness and stricter engineering safety standards, the performance requirements for various cutoff structures, especially vertical geomembrane cutoff walls, are becoming increasingly stringent.

[0003] Traditional methods for detecting seepage in landslide barriers include visual inspection and pressure testing. Visual inspection is inefficient and inaccurate, while pressure testing can damage the barrier. Furthermore, existing methods struggle to detect minute leaks and cannot provide a comprehensive assessment of internal seepage. With the development of electric field detection technology in geological exploration and groundwater detection, its ability to accurately detect leaks in geomembranes buried at the bottom of landslide barrier pools in unseen underground areas is a significant advantage. However, current electric field detection technologies require the pre-installation of numerous electrodes to create an electric field covering the entire pool area. For example, Chinese patent application CN202211192113.7 discloses an arc-shaped device and method for resistivity detection of seepage in landslide barriers. This involves complex electrode placement and construction, requiring repeated climbing in and out of smaller vertical landslide barriers, making the detection process inconvenient. Moreover, specialized personnel are needed to interpret the electric field data, thus limiting its widespread application. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a novel vertical anti-seepage wall pool leakage detection device based on the electric arc method, addressing the problem of complicated operation in the existing electric field detection technology for detecting leakage in anti-seepage wall pools.

[0005] This utility model is achieved using the following technical solution:

[0006] A leakage detection device for a vertical geomembrane pool based on the electric arc method includes a fixed grounding electrode positioned on the outer side of a geomembrane laid on the inner wall of the pool, a detection trolley that moves along the inner wall of the pool by traction, and a current detection module. The detection trolley is equipped with a rolling electrode that rolls along the inner wall of the pool. The rolling electrode continuously contacts the inner surface of the geomembrane as the detection trolley moves. The fixed grounding electrode and the rolling electrode on the detection trolley are electrically connected to the two poles of a power module. When the detection trolley passes through a damaged area of ​​the geomembrane, the rolling electrode forms a circuit with the fixed grounding electrode. The current detection module is connected to the circuit between the fixed grounding electrode and the rolling electrode. The detection trolley is equipped with a traction rod for moving the detection trolley. The change in current generated by the circuit formed between the fixed grounding electrode and the rolling electrode when the detection trolley passes through a damaged area of ​​the geomembrane detects the damage to the geomembrane.

[0007] In the present invention, a vertical anti-seepage wall pool leakage detection device based on electric arc method is further provided with adjustable length support wheel sets on both sides of the detection vehicle. The support wheel sets are pressed against the vertical side walls on both sides of the pool to limit the lateral movement of the detection vehicle along the inner wall of the pool.

[0008] In the vertical anti-seepage wall pool leakage detection device based on the electric arc method of this utility model, the support wheel group further includes telescopic support rods and universal rollers. The telescopic support rods are symmetrically fixed on both sides of the travel direction of the detection vehicle, and the universal rollers are set at the telescopic ends of the telescopic support rods. The universal rollers are pressed against the pool wall by the telescopic support rods. The lateral position of the detection vehicle on the inner wall of the pool can be adjusted by adjusting the different telescopic lengths of the two telescopic rods, so as to realize the detection vehicle's travel detection on a larger range of the inner wall of the pool.

[0009] In the vertical anti-seepage wall pool leakage detection device based on the electric arc method of this utility model, the detection vehicle is further provided with rolling electrodes on two vertical sides to make rolling contact with the side and bottom surfaces of the inner wall of the pool. The two rolling electrodes are connected in parallel to the two poles of the power supply via a fixed grounding electrode. Either rolling electrode can form a circuit with the fixed grounding electrode, so the posture of the detection vehicle does not need to be adjusted to detect the side and bottom surfaces of the inner wall of the pool.

[0010] In a vertical anti-seepage wall pool leakage detection device based on the electric arc method of this utility model, the rolling electrode further includes a conductive roller, a brush, and an electrode seat. The electrode seat is floatingly mounted on the detection vehicle, the brush is fixed on the electrode seat, the conductive roller is rotatably mounted on the electrode seat through a fixed shaft and maintains rolling contact with the brush, the conductive roller is in contact with the inner surface of the anti-seepage membrane of the pool wall, and is electrically connected to the power module through the brush.

[0011] In the vertical anti-seepage wall pool leakage detection device based on the electric arc method of this utility model, the width of the conductive roller is not less than the lateral width of the detection vehicle, so as to avoid the detection blind zone caused by the conductive roller being too short.

[0012] In the leakage detection device for a vertical anti-seepage wall pool based on the electric arc method of this utility model, the traction rod is a telescopic rod with adjustable telescopic length.

[0013] In the vertical anti-seepage wall pool leakage detection device based on the electric arc method of this utility model, the traction rod is further connected to the detection vehicle through a hinge seat, which makes it convenient for the operator to pull the detection vehicle from any position outside the pool.

[0014] In the vertical anti-seepage wall pool leakage detection device based on the electric arc method of this utility model, the power supply is a 30kV high-voltage power supply.

[0015] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0016] (1) This utility model uses a testing vehicle to replace the operator to go into the pool for testing. The operator can move along the inner wall of the pool by pulling the testing vehicle from outside the pool to test for damage to the impermeable membrane of the pool wall, which reduces the labor intensity of frequently entering and leaving the pool during the testing process and makes the testing efficiency higher.

[0017] (2) This utility model uses adjustable support wheel sets on both sides of the testing vehicle to limit the lateral position of the testing vehicle, and uses the universal rollers on the support wheel sets to guide the movement of the testing vehicle. Combined with the traction rod set on the testing vehicle, it ensures the stable movement of the testing vehicle along the inner wall of the pool, and ensures the stability of the arc method leak detection of the rolling electrode in contact with the inner side of the pool wall seepage prevention membrane.

[0018] (3) The telescopic length of the support wheel group on both sides of the inspection vehicle is adjustable. By adjusting the different telescopic lengths of the telescopic rods on both sides, the inspection vehicle can be positioned at different lateral positions on the inner wall of the pool. Combined with the use of rolling electrodes that are not less than the width of the inspection vehicle, the inspection of the inner wall of the pool can be fully covered.

[0019] In summary, the present invention provides a leakage detection device for vertical seepage barrier walls based on the electric arc method, which is particularly suitable for detecting leakage of seepage membranes in pools with vertical seepage barriers, reducing the intensity of detection and making the detection process convenient and efficient.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a vertical seepage prevention wall pool leakage detection device based on the electric arc method in one embodiment.

[0022] Figure 2 This is a schematic diagram of the support wheel assembly and traction rod structure on the test vehicle in the embodiment.

[0023] Figure 3a , 3b 3c and 3c are schematic diagrams showing the adjustment of the detection vehicle to three different lateral positions in the embodiment.

[0024] Figure 4 This is a schematic diagram of the conductive roller structure in the embodiment.

[0025] Figure 5 This is a schematic diagram illustrating the detection principle of a vertical seepage prevention wall pool leakage detection device based on the electric arc method in an embodiment.

[0026] The diagram is labeled as follows: 100-Inspection vehicle, 110-Support wheel assembly, 120-Traction rod, 111-Telescopic support rod, 112-Universal roller, 121-Hinge, 210-First rolling electrode, 211-Conductive roller, 212-Brush, 213-Fixed shaft, 214-Electrode seat, 215-Floating spring, 220-Second rolling electrode, 230-Fixed grounding electrode, 300-Current detection module, 400-Wire, 500-Pool body, 501-Pool wall impermeable membrane, 502-Damaged area, 600-Power module. Detailed Implementation

[0027] Example

[0028] See Figure 1The vertical impermeable wall pool leakage detection device shown in the figure is a specific embodiment of this utility model. It uses an electric arc method to detect damage and seepage in the impermeable membrane 501 of the pool wall 500. The pool 500 has at least two opposite sides configured as vertical impermeable walls, and the inner wall of the pool is covered with the impermeable membrane 501. The detection device specifically includes a detection cart 100, a support wheel set 110, a traction rod 120, a first rolling electrode 210, a second rolling electrode 220, a fixed grounding electrode 230, a current detection module 300, a wire 400, and a power module 600. The fixed grounding electrode 230 is set on the outside of the impermeable membrane 501 of the pool wall and can be fixed on the ground outside the pool body. The first rolling electrode 210 and the second rolling electrode 220 roll along the impermeable membrane laid on the inner wall of the pool with the testing vehicle 100 for rolling testing. The testing vehicle 100 moves along the inner wall of the pool by traction, and the first rolling electrode 210 or the second rolling electrode 220 set on it continuously contacts the inner surface of the impermeable membrane 501 of the pool wall during the movement of the testing vehicle. The fixed grounding electrode 230 and the first rolling electrode 210 or the second rolling electrode 220 on the testing vehicle are connected to the two poles of the power module 600 via wires 400. When the first rolling electrode 210 or the second rolling electrode 220 passes through the damaged area 502 of the pool wall geomembrane with the testing vehicle, a circuit is formed with the fixed grounding electrode 230. The current detection module 300 is connected to the circuit between the fixed grounding electrode and the rolling electrode. When an abnormal increase in current is detected between the fixed grounding electrode 230 and the first rolling electrode 210 or the second rolling electrode 220, it can be determined that the damaged area 502 of the pool wall geomembrane at the corresponding position of the testing vehicle is located.

[0029] See also Figure 2 The testing vehicle 100 is equipped with a towing rod 120 for moving the testing vehicle. Testing operators do not need to enter the pool; they can move the testing vehicle along the inner wall of the pool from outside the pool by controlling the towing rod 120. The towing rod 120 is an adjustable telescopic rod. By adjusting the telescopic length of the towing rod 120, the traction control can be adjusted to accommodate different depths and positions of the testing vehicle within the pool. Simultaneously, the towing rod 120 is universally hinged to the testing vehicle 100 via a hinge seat 121, allowing the towing rod 120 to form different angles relative to the testing vehicle 100, facilitating the operator to pull the testing vehicle from any position outside the pool.

[0030] To enhance the stability of the testing vehicle 100 as it travels along the inner wall of the pool, this embodiment provides adjustable support wheel sets 110 on both sides of the testing vehicle. The support wheel sets 110 press against the vertical sidewalls on both sides of the pool body 500 to laterally limit the movement of the testing vehicle 100 along the inner wall of the pool. In particular, when the testing vehicle 100 travels along the side of the inner wall of the pool, the support wheel sets 110 provide support and assistance to the two opposite sidewalls of the pool body, which can improve the operational stability of the testing vehicle controlled by the traction rod 120.

[0031] Specifically, the support wheel assembly 110 includes telescopic support rods 111 and omnidirectional rollers 112. The telescopic support rods 111 are symmetrically fixed on both sides of the travel direction of the inspection vehicle 100. The omnidirectional rollers 112 are located at the telescopic ends of the telescopic support rods 111. The telescopic support rods 111 press the omnidirectional rollers against the pool wall. Adjusting the different telescopic lengths of the two telescopic rods can adjust the lateral position of the inspection vehicle traveling on the inner wall of the pool. Figure 3a , 3b As shown in 3c, the inspection vehicle can travel in the middle, right, and left areas of the inner wall of the pool, enabling it to inspect a wider range of the pool's inner wall. In practical applications, the telescopic support rod 111 can be a manually adjustable telescopic sleeve rod, with locking nuts between adjacent sleeve rods. After the telescopic support rod 111 is adjusted to the correct length, it can be locked with the locking nuts to prevent the telescopic support rod 111 from automatically retracting during the inspection vehicle's movement, which would cause the universal roller 112 to separate from the inner wall of the pool. The manual telescopic sleeve rod structure is simple and lightweight, which helps reduce the overall weight of the inspection vehicle. Alternatively, an electric telescopic push rod can be used, using a motor to power the telescopic rod to push it out until the universal roller 112 is pressed against the inner wall of the pool. The electric telescopic push rod offers higher automation. The support wheel assembly 110 rolls on the pool wall via the universal roller 112, automatically adjusting its rolling direction to adapt as the inspection vehicle moves from the side of the inner wall to the bottom of the pool.

[0032] See you again Figure 1 In this embodiment, the first rolling electrode 210 and the second rolling electrode 220 are respectively arranged on the two vertical sides of the detection vehicle 100 corresponding to the inner wall of the pool and the ground. When the detection vehicle 100 moves and detects along the pool wall, it uses the rolling electrodes as rolling wheels on the corresponding detection pool wall. That is, when the detection vehicle 100 moves and detects along the side of the pool wall, it moves along the side of the pool wall to be detected using the first rolling electrode 210; when the detection vehicle 100 moves and detects along the ground of the pool wall, it moves along the ground of the pool wall to be detected using the second rolling electrode 220. The first rolling electrode 210 and the second rolling electrode 220 are connected to the positive and negative terminals of the power module through a parallel circuit with the fixed ground electrode 230. Either rolling electrode can form a circuit with the fixed ground electrode, so it is not necessary to adjust the posture of the detection vehicle to detect the side and bottom surfaces of the inner wall of the pool.

[0033] like Figure 4As shown, taking the first rolling electrode 210 as an example, the first rolling electrode 210 includes a conductive roller 211, a brush 212, a fixed shaft 213, an electrode seat 214, and a floating spring 215. The electrode seat 214 is connected to the body of the testing vehicle 100 through the floating spring 215, so that the rolling electrode is floatingly mounted on the testing vehicle 100. During the movement of the testing vehicle, pressure is applied to the testing vehicle through the traction rod to press the rolling electrode into tight contact with the impermeable membrane of the pool wall, ensuring that it can always maintain impermeability to the pool wall even on uneven pool wall surfaces. Effective membrane contact is achieved by fixing the brush 212 to the electrode holder 214 and rotating the conductive roller 211 on the electrode holder 214 via the fixed shaft 213, maintaining rolling contact with the brush 212. The outer peripheral wall of the conductive roller 211 is made of conductive material to make rolling contact with the geomembrane and the brush 212, while the central part is made of insulating material and rotates with the fixed shaft 213, thus achieving a rotational electrical connection between the rotating conductive roller 211 and the fixed brush 212. The rolling electrode is electrically connected to the power module via the brush 212. Since the testing vehicle mainly moves along the pool wall by rolling the electrode, in this embodiment, the width of the conductive roller of the rolling electrode is set to be no less than the lateral width of the testing vehicle. This increases the lateral width that the conductive roller can roll across in one pass and allows the testing vehicle to move stably on the pool wall surface via the wider conductive roller.

[0034] The structure of the second rolling electrode 220 is the same as that of the first rolling electrode 210, and will not be described in detail here.

[0035] The following combination Figure 5 The specific detection process of this embodiment will be described in detail.

[0036] The power module 600 in this embodiment can provide a high voltage of 30kV, including a 12V lithium battery, a DC / AC inverter, a high-frequency transformer, and an overvoltage protection circuit. The DC / AC inverter outputs 1kHz AC power from the 12V lithium battery, and then the high-frequency transformer boosts the voltage to 30kV. The overvoltage protection circuit uses a TVS diode to stabilize the output voltage of the power module at 30kV. This embodiment uses a DC power inverter to directly integrate the power module 600 onto the testing vehicle, allowing it to move with the rolling electrode. Only one output wire is needed to connect to the fixed grounding electrode, simplifying the wiring of the rolling electrode compared to directly using AC power.

[0037] Before testing in this embodiment, the system is first set up. A fixed grounding electrode 230 is placed on the ground next to the pool body outside the impermeable membrane of the pool wall. The positive terminal of the power module 600 is connected in parallel with the first rolling electrode 210 and the second rolling electrode 220 on the testing vehicle. The negative terminal of the power module 600 is connected to the fixed grounding electrode 230. The support wheel group 110 of the testing vehicle 100 is adjusted to support the length perpendicular to the pool walls on both sides of the pool body. The testing vehicle 100 is placed inside the pool body. The first rolling electrode 210 and the second rolling electrode 220 on it are pulled by the traction rod to roll into contact with the inner side of the impermeable membrane of the pool wall. If the geomembrane of the pool wall is intact, the insulating geomembrane will insulate the fixed grounding electrode 230 and the rolling electrode on the inspection vehicle, and no current path will be generated between them. At the damaged point 502 of the geomembrane, a current loop is formed between the fixed grounding electrode 230 and the first rolling electrode 210 or the second rolling electrode 220 on the inspection vehicle that has traveled there, through the damaged point 502. The current detection module 300 captures the abnormal current signal caused by the damaged point 502 of the geomembrane, thereby locating the leakage point of the geomembrane. Figure 5 The arc trigger threshold regulator indicates that the system relies on the current reaching a certain threshold to determine the occurrence of an arc (or a strong current path). The generated arc provides a more intuitive indication of leakage and gives a leakage alarm signal.

[0038] In this embodiment, the DC-AC inverter and boost converter of the power module 600 are known power supply electrical circuits, and the current detection module 300 uses a known current detection instrument. In this embodiment, the electrical circuits of the power module and the current detection module will not be described in detail.

[0039] In this document, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of clarifying the technical solution and for the convenience of description, and therefore should not be construed as limiting the present utility model.

[0040] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A leakage detection device for a vertical seepage-proof wall pool based on the electric arc method, characterized in that: It includes a fixed grounding electrode set on the outside of the impermeable membrane laid on the inner wall of the pool, a detection vehicle that moves along the inner wall of the pool by traction, and a current detection module. The testing vehicle is equipped with a rolling electrode that rolls along the inner wall of the pool. The rolling electrode continuously contacts the inner surface of the impermeable membrane of the pool wall during the movement of the testing vehicle. The fixed grounding electrode and the rolling electrode on the testing vehicle are electrically connected to the two poles of the power module. When the rolling electrode passes through the damaged part of the impermeable membrane of the pool wall with the testing vehicle, it forms a circuit with the fixed grounding electrode. The current detection module is connected to the circuit between the fixed grounding electrode and the rolling electrode. The testing vehicle is equipped with a tow bar for moving the testing vehicle.

2. The leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 1, characterized in that: The testing vehicle is equipped with adjustable support wheel sets on both sides. The support wheel sets are pressed against the vertical side walls on both sides of the pool body to limit the lateral movement of the testing vehicle along the inner wall of the pool body.

3. The leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 2, characterized in that: The support wheel assembly includes a telescopic support rod and omnidirectional rollers. The telescopic support rods are symmetrically fixed on both sides of the travel direction of the testing vehicle, and the omnidirectional rollers are located at the telescopic ends of the telescopic support rods. The telescopic support rods press the omnidirectional rollers firmly against the pool wall.

4. The leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 1, characterized in that: The testing vehicle is equipped with rolling electrodes on two vertical sides, which make rolling contact with the side and bottom surfaces of the inner wall of the pool. The two rolling electrodes are connected in parallel to a fixed grounding electrode at the two poles of the power supply.

5. A leakage detection device for a vertical anti-seepage wall pool based on the electric arc method according to claim 1 or 4, characterized in that: The rolling electrode includes a conductive roller, a brush, and an electrode holder. The electrode holder is floatingly mounted on the testing vehicle. The brush is fixed on the electrode holder. The conductive roller is rotatably mounted on the electrode holder via a fixed shaft and maintains rolling contact with the brush. The conductive roller is in contact with the inner surface of the geomembrane of the pool wall and is electrically connected to the power module through the brush.

6. The leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 5, characterized in that: The width of the conductive roller is not less than the lateral width of the inspection vehicle.

7. The leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 1, characterized in that: The traction rod is a telescopic rod with an adjustable telescopic length.

8. The leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 7, characterized in that: The traction rod is universally hinged to the testing vehicle via a hinge seat.

9. A leakage detection device for a vertical seepage-proof wall pool based on the electric arc method according to claim 1, characterized in that: The power source is a 30kV high-voltage power source.

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