Dam piping detection mechanism

Abstract

The utility model provides a dam piping detection mechanism, which relates to the technical field of dam piping leakage detection and comprises a telescopic arm and a leakage detection frame connected to the telescopic end of the telescopic arm, walking wheels are arranged on the leakage detection frame, a plurality of probes used for detecting electric signals are arranged on the leakage detection frame at intervals along the horizontal direction, and the plurality of probes form a probe array. The bottom end of the probe is higher than that of the walking wheel; the probe comprises a connecting pipe, a first electrode and a second electrode, the first electrode and the second electrode are connected to the top end and the bottom end of the connecting pipe respectively, and the first electrode and the second electrode are electrically connected to the receiver through wires respectively and used for transmitting detected electric signals to the receiver; according to the utility model, the plurality of probes form the probe array, the telescopic arm moves downwards along the slope surface to drive the leakage detection frame to move downwards on the levee slope, the probe array on the leakage detection frame simultaneously detects electric signals, the detection width can reach several meters, so that the position of a piping point can be quickly positioned, the structure is simple, the application is convenient, and the working efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of dam piping leakage detection, in particular to a dam piping leakage detection mechanism. Background Art

[0002] Floods are often caused by breaches in dikes, which are often caused by piping that is not detected and quickly blocked. When piping occurs in river, lake, or reservoir dams, the water displaces soil particles, expanding the diameter of the piping until it breaks. Because underwater piping is highly concealed, its inlet location is difficult to locate. Therefore, rapid identification and swift blocking of piping inlets are crucial.

[0003] Currently, dam piping and leakage detectors based on the "flow field method" are primarily used to detect the inlet of leaking pipes in dams, thereby identifying the location of the piping outlet. Commonly used probes in the prior art, such as the probe for a dam piping and leakage detector disclosed in Patent Publication No. CN207730408U, are typically connected to a monitoring vessel in a piping detection and inspection system disclosed in Patent Publication No. CN216108310U. Using a single probe carried by the monitoring vessel to detect the piping location requires maintaining a suitable distance from the probe to the water bottom, ensuring that the probe does not touch the bottom of the dam, nor is it too far from the bottom. This operation is cumbersome and inefficient. Furthermore, the detection width of a single probe is too narrow. Wide dams require multiple rounds of inspection, requiring the monitoring vessel to constantly move to locate the piping outlet. This results in a prolonged detection time for the piping outlet. Failure to quickly seal the piping outlet could lead to a dam breach. Utility Model Content

[0004] In view of the above problems existing in the prior art, the utility model provides a dam piping detection mechanism with high detection speed, simple structure and higher detection accuracy.

[0005] The utility model solves the above-mentioned technical problems with the following technical solutions: a dam piping detection mechanism, characterized in that it comprises a telescopic arm and a leak detection frame connected to the telescopic end of the telescopic arm, the leak detection frame being provided with a running wheel, the leak detection frame being provided with a plurality of probes for detecting electrical signals at intervals in the horizontal direction, the plurality of probes forming a probe array, the bottom ends of the probes being higher than the bottom ends of the running wheels;

[0006] The probe includes a connecting tube, a first electrode and a second electrode, the first electrode and the second electrode are respectively connected to the top and bottom ends of the connecting tube, and the first electrode and the second electrode are respectively electrically connected to a receiver through wires for transmitting the detected electrical signal to the receiver.

[0007] Furthermore, a distance measuring encoder is installed at the telescopic end of the telescopic arm, and the distance measuring encoder is electrically connected to the receiver via a signal line.

[0008] Furthermore, a water depth sensor is installed on the leak detection frame, and the water depth sensor is electrically connected to the receiver.

[0009] Furthermore, the connecting tube is a flexible, rigid tube that can bend when subjected to external force and automatically reset itself after the external force is removed. Furthermore, a tee is connected to the top of the connecting tube. The bottom of the tee is fixedly connected to the connecting tube, the top of the tee is fixedly connected to the first electrode, and the side of the tee extends laterally to serve as an outlet for the wire, and a sealing cap is connected to the outlet.

[0010] Furthermore, the connecting pipe is fixed on the leak detection frame through a clamping ring.

[0011] Furthermore, the first electrode and the second electrode are made of metal in a spherical, disk-shaped or hemispherical structure, preferably copper.

[0012] Furthermore, the leak detection frame is hinged to the telescopic end of the telescopic arm.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model connects the leak detection frame to the telescopic end of the telescopic arm through a hinge, and the leak detection frame is equipped with walking wheels. A plurality of probes for detecting electrical signals are arranged at intervals on the leak detection frame. The plurality of probes form a probe array. The telescopic arm moves downward along the slope, driving the leak detection frame to move downward on the embankment slope. The probe array on the leak detection frame detects electrical signals at the same time. The detection width can reach several meters, so as to quickly locate the position of the pipe burst point. The utility model has a simple structure, is easy to use, and has high work efficiency.

[0015] 2. The utility model further realizes the three-dimensional positioning of piping points by combining the distance measuring encoder provided at the telescopic end of the telescopic arm and the water depth sensor installed on the leak detection frame with the detection of a multi-probe array, which makes the positioning more accurate and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model (excluding the telescopic arm);

[0017] Figure 2 This is a schematic diagram of the top structure of an embodiment of the utility model (excluding the telescopic arm);

[0018] Figure 3 This is a structural diagram of a connecting pipe according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the connection structure between the connecting pipe and the leak detection frame according to one embodiment of the present invention (from a top view);

[0020] Figure 5This is a schematic structural diagram of an embodiment of the present invention in use;

[0021] In the figure: 1. Leak detection frame, 2. Travel wheel, 3. Probe, 4. Connecting pipe, 5. First electrode, 6. Second electrode, 7. Lead wire, 8. Clamp, 9. Tee pipe, 10. Water depth sensor, 11. Telescopic arm. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1 and Figure 2 As shown, this embodiment provides a dam pipe burst detection mechanism, which includes a telescopic arm 11 and a leak detection frame 1 connected to the telescopic end of the telescopic arm 11, the leak detection frame 1 is provided with a walking wheel 2, and the leak detection frame 1 is provided with a plurality of probes 3 for detecting electrical signals at intervals in the horizontal direction, and the plurality of probes 3 form a probe array; the bottom end of the probe 3 is higher than the bottom end of the walking wheel 2, so that when the leak detection frame 1 moves, the distance from the probe to the water bottom is kept constant, thereby ensuring the detection accuracy of the probe.

[0024] The probe 3 includes a connecting tube 4, a first electrode 5 and a second electrode 6. The connecting tube 4 is fixedly connected to the leak detection frame 1 through a set of plastic clamps 8. The first electrode 5 and the second electrode 6 are respectively connected to the top and bottom ends of the connecting tube 4 so that a certain distance is maintained between the two. The first electrode 5 and the second electrode 6 are respectively electrically connected to the receiver through a wire 7 for transmitting the detected electrical signal to the receiver.

[0025] This embodiment uses the flow field method to detect dam piping and leakage. The detection mechanism is complemented by a transmitter (known technology) for generating a spectrum electrical signal. The transmitter is connected to two electrodes: one placed on the dam's backslope, at the piping outlet; the other placed in the water near the dam's upslope, at the piping inlet. The transmitter emits a spectrum current, forming a current loop between the two electrodes on either side of the dam. A normal spectrum electrical signal is generated on the upslope, while a higher, abnormal electrical signal is generated at the piping site. This signal is sensed and collected by a probe. When an abnormal signal (a clear peak) is detected, the piping point is identified.

[0026] When a pipe burst occurs, a pipe burst detection robot (as described in the patent application document with application number 2024112725886) is driven to the dam suspected of having a pipe burst. The telescopic arm 11 of the pipe burst detection robot extends downward along the slope of the dam, and the telescopic end of the telescopic arm simultaneously pushes the leak detection frame 1 to move downward along the slope of the dam. The probe array detects electrical signals respectively. The first electrode 5 and the second electrode 6 are spherical, disc-shaped or hemispherical structures made of metal. If a copper hemispherical structure is used, the two electrodes can detect the abnormal high voltage signal formed by the pipe burst leakage channel and transmit the signal to the receiver. In this embodiment, a plurality of parallel probes 3 are arranged on the leak detection frame 1 to form a probe array, and the probes 3 are vertical in the working state. When working, the probes 3 transmit signals to the receiver. When the potential difference signal corresponding to one of the probes shows a significant change, it indicates that the probe is close to the pipe burst entrance. If the potential difference signals corresponding to the two probes 3 show a significant change, it indicates that the pipe burst entrance is located between the two probes 3, thereby more accurately judging the pipe burst entrance. If it shows that there is no pipe burst inlet, move the pipe burst detection robot to another location for multi-probe detection.

[0027] In a preferred embodiment of the present invention, a distance encoder is mounted on the telescopic end of the telescopic arm 11, which is electrically connected to a receiver via a signal line. As the telescopic arm 11 of the piping detection robot moves downward along the embankment slope, it drives the distance encoder to measure the distance traveled, which is used to detect the distance between the piping point and the dam crest. Furthermore, a water depth sensor 10 is mounted on the leak detection frame 1, which is electrically connected to a receiver and detects the water depth at the piping point and transmits the water depth value to the receiver. This allows the specific location of the piping point to be determined, achieving three-dimensional positioning with high accuracy.

[0028] In a preferred embodiment of the present invention, the connecting tube 4 is a hard tube with elasticity, so that it can bend and deform when subjected to external force, and automatically reset after the external force is removed, so as to avoid damage to the probe caused by contact with underwater rocks, weeds and other objects.

[0029] In a preferred embodiment of the present invention, a tee 9 is connected to the top of the connecting tube 4. The bottom opening 91 of the tee 9 is fixedly connected to the connecting tube 4, and the top opening 92 of the tee 9 is fixedly connected to the first electrode 5. The side opening 93 of the tee 9 extends to the side as the outlet for the wire 7, and a sealing cap is connected to the outlet. The wire 7 passes through the sealing cap into the side opening 93 of the tee 9, then enters the connecting tube 4 through the bottom opening 91 and is connected to the second electrode 6. Another wire 7 passes through the sealing cap into the side opening 93 of the tee 9, then connects to the first electrode 5 through the top opening 92. The connecting tube 4 is sealed with the tee 9 and the second electrode 6. The sealing cap is sealed with the two wires. The two wires are led out through the sealing cap, and the wires of the probe array are gathered and connected to the receiver. The advantage of this structure is that the wiring is reasonable and the sealing of the connecting tube and the tee can be guaranteed.

[0030] In a preferred embodiment of the present invention, the leak detection frame 1 is hinged to the telescopic end of the telescopic arm 11. Figure 5 Its function is to enable the leak detection frame 1 to rotate around the hinge axis with the telescopic arm 11 when encountering fluctuations in the underwater terrain during operation, so as to cross the undulating terrain, ensure that the distance between the probe and the ground is constant, improve detection accuracy, avoid damage to the leak detection frame 1, and ensure smooth detection.

Claims

1. A dam piping detection mechanism, characterized in that: The invention comprises a telescopic arm (11) and a leak detection frame (1) connected to the telescopic end of the telescopic arm (11); a running wheel (2) is provided on the leak detection frame (1); a plurality of probes (3) for detecting electrical signals are provided at intervals in the horizontal direction on the leak detection frame (1); the plurality of probes (3) form a probe array; and the bottom ends of the probes (3) are higher than the bottom ends of the running wheels (2); The probe (3) comprises a connecting tube (4), a first electrode (5) and a second electrode (6), wherein the first electrode (5) and the second electrode (6) are respectively connected to the top end and the bottom end of the connecting tube (4), and the first electrode (5) and the second electrode (6) are respectively electrically connected to a receiver via a wire (7) for transmitting a detected electrical signal to the receiver.

2. The dam piping detection mechanism according to claim 1, characterized in that: A distance measuring encoder is installed at the telescopic end of the telescopic arm (11), and the distance measuring encoder is electrically connected to a receiver via a signal line.

3. The dam piping detection mechanism according to claim 1 or 2, characterized in that: A water depth sensor (10) is installed on the leak detection frame (1), and the water depth sensor is electrically connected to a receiver.

4. The dam piping detection mechanism according to claim 1, characterized in that: The connecting pipe (4) is a hard pipe with elasticity so that it can bend when subjected to external force and automatically reset after the external force is eliminated.

5. The dam piping detection mechanism according to claim 1, characterized in that: The connecting pipe (4) is fixed on the leak detection frame (1) via a clamping ring (8).

6. The dam piping detection mechanism according to claim 1, characterized in that: The first electrode (5) and the second electrode (6) are spherical, disc-shaped or hemispherical structures made of metal.

7. The dam piping detection mechanism according to claim 1, characterized in that: The leak detection frame (1) is hinged to the telescopic end of the telescopic arm (11).

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