Geomembrane leakage detection device and detection method

Abstract

The application discloses a geomembrane leakage detection device and a detection method. The detection device comprises a rack, a high-voltage discharge electrode installed on the rack, wherein the high-voltage discharge electrode comprises oppositely arranged positive and negative electrodes, and the positive and negative electrodes are spaced apart to form a gap for the geomembrane to pass through; a first transmission roller rotatably installed on the rack; and a second transmission roller rotatably installed on the rack, and the first transmission roller and the second transmission roller are respectively located on the two sides of the high-voltage discharge electrode. The geomembrane leakage detection device can comprehensively detect the damage leakage of the geomembrane, has good detection precision and high detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of geomembrane damage detection technology, and more specifically, to a geomembrane leakage detection device and detection method. Background Technology

[0002] During the manufacturing process of geomembranes (or composite geomembranes), uneven heating can easily lead to localized deformation and damage. At the factory, geomembranes are typically only sampled and tested in a laboratory, which cannot guarantee the quality of every piece used in the project. Furthermore, defects in the geomembranes delivered to the construction site can usually only be detected manually. Since the damage may be very small, manual inspection is often insufficient to detect the problem. Currently, there is no reliable testing equipment capable of comprehensively inspecting geomembranes. Summary of the Invention

[0003] The main objective of this invention is to provide a geomembrane leakage detection device and method. This geomembrane leakage detection device can comprehensively detect damage and leakage of geomembranes, with good detection accuracy and high detection efficiency.

[0004] To achieve the above objectives, the present invention provides a geomembrane leakage detection device, comprising:

[0005] frame;

[0006] A high-voltage discharge electrode is mounted on a frame. The high-voltage discharge electrode includes a positive electrode and a negative electrode arranged opposite each other, with the positive electrode and the negative electrode spaced apart to form a gap for the geomembrane to pass through.

[0007] The first drive roller is rotatably mounted on the frame;

[0008] The second drive roller is rotatably mounted on the frame, and the first and second drive rollers are located on opposite sides of the high-voltage discharge electrode, respectively.

[0009] Furthermore, the frame is equipped with a first geotextile placement roller and a second geotextile placement roller, which are rotatably mounted on both sides of the second drive roller.

[0010] Furthermore, a first guide roller and a second guide roller are provided on the frame. The first guide roller and the second guide roller are respectively installed on both sides of the high-voltage discharge electrode. The upper edges of the first guide roller and the second guide roller are flush with the gap height between the positive electrode and the negative electrode.

[0011] Furthermore, a leak repair operation platform is provided on one side of the high-voltage discharge electrode on the frame.

[0012] Furthermore, a power distribution control cabinet is installed on the frame below the high-voltage discharge electrode and the leak repair operation platform, and the high-voltage discharge electrode is connected to the power distribution control cabinet.

[0013] According to another aspect of the present invention, a method for detecting geomembrane leakage is provided, wherein the above-described geomembrane leakage detection equipment is used for detection, and the geomembrane leakage detection method includes:

[0014] Step S1: Place the geomembrane to be tested on the first drive roller, and pass the starting end of the geomembrane through the gap between the positive and negative electrodes.

[0015] Step S2: Energize the high-voltage discharge electrode, hold the starting end of the geomembrane through an insulator and pull the geomembrane onto the second drive roller for fixation;

[0016] Step S3: The second drive roller rotates, causing the geomembrane on the first drive roller to pass through the gap between the positive and negative electrodes one after another; the inspectors judge whether the geomembrane passing through the gap is damaged by observing whether the high-voltage discharge electrode produces an electric arc or a sound.

[0017] Furthermore, in step S3, the inspectors determine whether the geomembrane passing through the gap is damaged by observing whether the high-voltage discharge electrode produces an electric arc or a sound. Specifically, this means:

[0018] If the geomembrane generates an electric arc or makes a sound when it passes through the high-voltage discharge electrode, then the geomembrane is damaged at that point; if the geomembrane does not generate an electric arc or make a sound when it passes through the high-voltage discharge electrode, then the geomembrane is intact at that point.

[0019] Furthermore, methods for detecting geomembrane leakage also include:

[0020] Step S4: After detecting damage on the geomembrane, de-energize the high-voltage discharge electrode, repair the damaged area of ​​the geomembrane, and then energize the high-voltage discharge electrode again after the repair is completed.

[0021] Step S5: Repeat steps S3 and S4 until the entire roll of geomembrane has been inspected;

[0022] Step S6: The first drive roller rotates, causing the geomembrane to move in the opposite direction through the gap between the positive and negative electrodes, and the repaired geomembrane is re-inspected.

[0023] Furthermore, methods for detecting geomembrane leakage also include:

[0024] Step S7: After the re-inspection is completed, place geotextiles on the first geotextile placement roller and the second geotextile placement roller respectively, and pull and fix the geotextiles on the first geotextile placement roller and the second geotextile placement roller to the second drive roller, with the two geotextiles located on the top and bottom of the geomembrane respectively.

[0025] Step S8: The second drive roller rotates, causing the two geotextiles to be bonded to the upper and lower surfaces of the geomembrane respectively, forming a composite geomembrane.

[0026] Furthermore, methods for detecting geomembrane leakage also include:

[0027] Step S9: Repeat steps S1 to S6 to perform leakage detection on the composite geomembrane.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The geomembrane leakage detection device of the present invention uses high-voltage electric spark for detection, which has high detection sensitivity and good detection comprehensiveness. It can detect even pinhole-sized holes on the geomembrane, which effectively solves the problems of inadequate and difficult detection by manual inspection of geomembrane.

[0030] (2) The geomembrane leakage detection equipment of the present invention can continuously detect the entire roll of geomembrane, with high detection efficiency. It only takes about 30 minutes to detect one roll of geomembrane (excluding repair time).

[0031] (3) The geomembrane leakage detection equipment of the present invention is simple to operate and does not require special operation. The damaged leakage point is blackened by electric arc, making it easy to find and repair.

[0032] (4) The width of the geomembrane leakage detection device of the present invention can be designed according to the width of the geomembrane to be tested, so as to meet the comprehensive testing needs of the geomembrane. Furthermore, the device can be disassembled and transported to the construction site without being fixed in the laboratory, making it flexible and convenient to use. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0034] Figure 1 This is a perspective view of the geomembrane leakage detection device according to an embodiment of the present invention.

[0035] Figure 2 This is a front view of the geomembrane leakage detection device according to an embodiment of the present invention.

[0036] Figure 3 This is a side view of the geomembrane leakage detection device according to an embodiment of the present invention.

[0037] Figure 4 This is a top view of the geomembrane leakage detection device according to an embodiment of the present invention.

[0038] Figure 5 This is a side view of the geomembrane leakage detection device in use according to an embodiment of the present invention.

[0039] The above figures include the following reference numerals:

[0040] 1. Frame; 2. High-voltage discharge electrode; 3. First drive roller; 4. Second drive roller; 5. First guide roller; 6. Second guide roller; 7. First geotextile placement roller; 8. Second geotextile placement roller; 9. Leak repair operation platform; 10. Power distribution control cabinet; 100. Geomembrane; 200. Geotextile. Detailed Implementation

[0041] To facilitate understanding of the present invention, a more comprehensive and detailed description of the invention will be provided below in conjunction with the accompanying drawings and preferred embodiments. However, the scope of protection of the present invention is not limited to the specific embodiments described below. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0042] Unless otherwise defined, all technical terms used below have the same meaning as commonly understood by those skilled in the art. The terms "first," "second," and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely for the purpose of distinguishing corresponding components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0043] See Figures 1 to 5 An embodiment of the present invention discloses a geomembrane leakage detection device, which mainly includes a frame 1, a high-voltage discharge electrode 2, a first transmission roller 3, and a second transmission roller 4. The high-voltage discharge electrode 2 is mounted on the frame 1 and includes a positive electrode and a negative electrode arranged opposite each other, spaced apart to form a gap for the geomembrane 100 to pass through. The first transmission roller 3 is rotatably mounted on the frame 1; the second transmission roller 4 is rotatably mounted on the frame 1, and the first transmission roller 3 and the second transmission roller 4 are respectively located on both sides of the high-voltage discharge electrode 2.

[0044] The aforementioned geomembrane leakage detection equipment includes a high-voltage discharge electrode 2 mounted on a frame 1, with a first drive roller 3 and a second drive roller 4 positioned on either side of the high-voltage discharge electrode 2. When detecting leakage in the geomembrane 100, the geomembrane roll to be tested is placed on one drive roller, allowing the geomembrane 100 to pass through the gap between the positive and negative electrodes, and the starting end of the geomembrane 100 is fixed on the other drive roller. The high-voltage discharge electrode 2 is energized, and the rotation of the drive rollers causes the geomembrane 100 to pass through it sequentially. High-voltage DC discharge is used to detect damage to the geomembrane 100. When damage is present in the geomembrane 100, the positive and negative electrodes discharge at the damage point, generating an electric arc. The damaged area is blackened by the arc, turning a white hole into a visible black hole, making it easy for inspectors to spot and repair. This geomembrane leakage detection equipment can comprehensively detect leakage in the geomembrane 100 with high accuracy and efficiency.

[0045] In this embodiment, a first geotextile placement roller 7 and a second geotextile placement roller 8 are also provided on the frame 1. The first geotextile placement roller 7 and the second geotextile placement roller 8 are rotatably mounted on both sides of the second drive roller 4. After the geomembrane 100 is inspected, repaired, and re-inspected, a roll of geotextile 200 can be installed on the first geotextile placement roller 7 and the second geotextile placement roller 8 respectively. One end of each roll of geotextile 200 is fixed on the second drive roller 4 and located on the upper and lower surfaces of the geomembrane 100 respectively. Then, the second drive roller 4 is rotated to laminate a layer of geotextile 200 onto the upper and lower surfaces of the geomembrane 100, forming a composite geomembrane. With this configuration, the geomembrane leakage detection equipment can not only detect damage and leakage of the geomembrane 100, but also laminate the geomembrane 100 and geotextile 200 to form a composite geomembrane, and can detect leakage of the composite geomembrane.

[0046] In this embodiment, a first guide roller 5 and a second guide roller 6 are also provided on the frame 1. The first guide roller 5 and the second guide roller 6 are respectively installed on both sides of the high-voltage discharge electrode 2, and the upper edges of the first guide roller 5 and the second guide roller 6 are flush with the gap between the positive electrode and the negative electrode. This arrangement can guide the geomembrane 100 through the gap between the positive electrode and the negative electrode, allowing the geomembrane 100 to pass through the gap smoothly.

[0047] In this embodiment, a repair operation platform 9 is also provided on one side of the high-voltage discharge electrode 2 on the frame 1. When damage to the geomembrane 100 is detected, the high-voltage discharge electrode 2 and the drive roller are turned off, and the inspection personnel climb the stairs to the repair operation platform 9 to repair the damaged area of ​​the geomembrane 100.

[0048] In this embodiment, a power distribution control cabinet 10 is also provided on the frame 1 below the high-voltage discharge electrode 2 and the leak repair operation platform 9. The power distribution control cabinet 10 is equipped with power distribution equipment. The high-voltage discharge electrode 2 is connected to the power distribution equipment in the power distribution control cabinet 10, and the power supply to the high-voltage discharge electrode 2 is controlled by the power distribution equipment.

[0049] The working principle of this geomembrane leakage detection equipment is as follows:

[0050] During the damage and leakage detection of geomembrane 100:

[0051] Step 1: Place the geomembrane 100 to be tested on the first drive roller 3, and pass the starting end of the geomembrane 100 through the gap between the positive electrode and the negative electrode.

[0052] Step 2: Power on the high-voltage discharge electrode 2, and pull the geomembrane 100 to the second drive roller 4 by holding the starting end of the geomembrane 100 through an insulator. If the starting end of the geomembrane 100 is not damaged after inspection, fix the starting end of the geomembrane 100 to the second drive roller 4.

[0053] Step 3: The second drive roller 4 rotates to the right, causing the geomembrane 100 on the first drive roller 3 to pass successively through the gap between the positive and negative electrodes. During this process, the inspectors observe whether the high-voltage discharge electrode 2 generates an electric arc or a sound to determine whether the geomembrane 100 passing through the gap is damaged.

[0054] Specifically, if the geomembrane 100 generates an electric arc or makes a sound when it passes through the high-voltage discharge electrode 2, it can be determined that there is damage to the geomembrane 100 at that point; if the geomembrane 100 does not generate an electric arc or make a sound when it passes through the high-voltage discharge electrode 2, it can be determined that the geomembrane 100 at that point is intact.

[0055] The positive and negative electrodes will discharge at the damaged part of the geomembrane 100. The generated electric arc will blacken the hole, turning the white hole on the geomembrane 100 into a black hole that is visible to the naked eye, making it easier for inspectors to observe and repair.

[0056] Step 4: When damage is detected on the geomembrane 100, the high-voltage discharge electrode 2 is de-energized, the damaged area of ​​the geomembrane 100 is repaired, and the high-voltage discharge electrode 2 is energized again after the repair is completed.

[0057] Step 5: Repeat steps 3 and 4 above until the entire roll of geomembrane has been tested to 100% accuracy.

[0058] During the re-inspection of the completed geomembrane 100:

[0059] Step 6: The first drive roller 3 rotates to the left, causing the geomembrane 100 to move in the opposite direction and pass through the gap between the positive and negative electrodes. The repaired geomembrane 100 is then re-inspected by the high-voltage discharge electrode 2 to check whether there is still any damage on the geomembrane 100.

[0060] When combining geotextile 200 and geomembrane 100 to form a composite geomembrane:

[0061] Step 7: After the re-inspection is completed, place a roll of geotextile 200 on the first geotextile placement roller 7 and the second geotextile placement roller 8 respectively, and pull and fix the geotextile 200 on the first geotextile placement roller 7 and the second geotextile placement roller 8 on the second drive roller 4, so that the two pieces of geotextile 200 are located above and below the geomembrane 100 respectively.

[0062] Step 8: The second drive roller 4 rotates to the right (at this time, the geomembrane 100 after the re-inspection is on the first drive roller 3), so that the two geotextiles 200 are respectively combined with the upper and lower surfaces of the geomembrane 100 to form a composite geomembrane.

[0063] When conducting damage and leakage detection on composite geomembranes:

[0064] Step 9: Repeat steps 1 through 6 above to conduct a leakage test on the composite geomembrane.

[0065] In summary, the geomembrane leakage detection equipment of this invention effectively solves the problems of inadequate and difficult manual inspection of geomembrane 100; it can continuously inspect the entire roll of geomembrane 100 with high efficiency, requiring only about 30 minutes (excluding repair time) to inspect one roll; the equipment is simple to operate and requires no special skills; the high-voltage electric spark detection provides high sensitivity and comprehensiveness, detecting even pinhole-sized openings on the geomembrane 100; damaged leakage points are blackened by the electric arc, making them easy to locate and repair; the width of the equipment can be designed according to the width of the geomembrane 100 to be inspected, meeting the needs of comprehensive inspection of the geomembrane 100; the equipment can be disassembled and transported to the construction site, eliminating the need to fix it in the laboratory.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting leakage in geomembranes, characterized in that, The geomembrane leakage detection equipment is used for detection, and the geomembrane leakage detection method includes: Step S1: Place the geomembrane (100) to be tested on the first drive roller (3) and pass the starting end of the geomembrane (100) through the gap between the positive electrode and the negative electrode. Step S2: Power on the high-voltage discharge electrode (2), pull the starting end of the geomembrane (100) through an insulator and pull the geomembrane (100) onto the second drive roller (4) for fixation; Step S3: The second drive roller (4) rotates, causing the geomembrane (100) on the first drive roller (3) to pass through the gap between the positive and negative electrodes one after another; the inspector judges whether the geomembrane (100) passing through the gap is damaged by observing whether the high-voltage discharge electrode (2) produces an electric arc or sound. Step S4: After detecting damage on the geomembrane (100), the high-voltage discharge electrode (2) is de-energized, the damaged part of the geomembrane (100) is repaired, and the high-voltage discharge electrode (2) is energized again after the repair is completed. Step S5: Repeat steps S3 and S4 until the entire roll of geomembrane (100) has been inspected; Step S6: The first drive roller (3) rotates, causing the geomembrane (100) to move in the opposite direction through the gap between the positive and negative electrodes, and the repaired geomembrane (100) is re-inspected; Step S7: After the re-inspection is completed, geotextile (200) is placed on the first geotextile placement roller (7) and the second geotextile placement roller (8) respectively. The geotextile (200) on the first geotextile placement roller (7) and the second geotextile placement roller (8) are pulled and fixed on the second transmission roller (4), and the two geotextiles (200) are located on the top and bottom of the geomembrane (100) respectively. Step S8: The second drive roller (4) rotates, causing the two geotextiles (200) to be combined with the upper and lower surfaces of the geomembrane (100) respectively, forming a composite geomembrane; The geomembrane leakage detection equipment includes: Rack (1); A high-voltage discharge electrode (2) is installed on the frame (1). The high-voltage discharge electrode (2) includes a positive electrode and a negative electrode arranged opposite to each other. The positive electrode and the negative electrode are spaced apart to form a gap for the geomembrane (100) to pass through. The first drive roller (3) is rotatably mounted on the frame (1); The second drive roller (4) is rotatably mounted on the frame (1), and the first drive roller (3) and the second drive roller (4) are located on both sides of the high voltage discharge electrode (2); The frame (1) is provided with a first geotextile placement roller (7) and a second geotextile placement roller (8), which are rotatably mounted on both sides of the second drive roller (4).

2. The method for detecting geomembrane leakage according to claim 1, characterized in that, The frame (1) is provided with a first guide roller (5) and a second guide roller (6). The first guide roller (5) and the second guide roller (6) are respectively installed on both sides of the high voltage discharge electrode (2). The upper edge of the first guide roller (5) and the second guide roller (6) is flush with the gap between the positive electrode and the negative electrode.

3. The method for detecting geomembrane leakage according to claim 1, characterized in that, A leak repair operation platform (9) is provided on one side of the high-voltage discharge electrode (2) on the frame (1).

4. The method for detecting geomembrane leakage according to claim 3, characterized in that, A power distribution control cabinet (10) is provided on the frame (1) below the high-voltage discharge electrode (2) and the leak repair operation platform (9), and the high-voltage discharge electrode (2) is connected to the power distribution control cabinet (10).

5. The method for detecting geomembrane leakage according to claim 1, characterized in that, In step S3, the inspector determines whether the geomembrane (100) passing through the gap is damaged by observing whether the high-voltage discharge electrode (2) generates an electric arc or a sound. Specifically, this means: If the geomembrane (100) generates an electric arc or makes a sound when it passes through the high-voltage discharge electrode (2), then the geomembrane (100) is damaged at that point; if the geomembrane (100) does not generate an electric arc or make a sound when it passes through the high-voltage discharge electrode (2), then the geomembrane (100) is intact at that point.

6. The method for detecting geomembrane leakage according to claim 1, characterized in that, The geomembrane leakage detection method also includes: Step S9: Repeat steps S1 to S6 to perform leakage detection on the composite geomembrane.

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