CN114509217B - Reservoir leakage detection device and detection method thereof - Google Patents
Reservoir leakage detection device and detection method thereof Download PDFInfo
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- CN114509217B CN114509217B CN202210079161.9A CN202210079161A CN114509217B CN 114509217 B CN114509217 B CN 114509217B CN 202210079161 A CN202210079161 A CN 202210079161A CN 114509217 B CN114509217 B CN 114509217B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes
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Abstract
The invention relates to the technical field of water conservancy facilities, in particular to a reservoir leakage detection device and a detection method thereof. According to the reservoir leakage detection device provided by the invention, the warp detection line and the weft detection line are respectively arranged in the warp direction and the weft direction of the fixed frame, the warp detection line is connected with the warp strain gauge, the weft detection line is connected with the weft strain gauge, when leakage or piping occurs to a dam body, the leakage part water flows outwards, the leakage part can squeeze the geomembrane, so that the geomembrane is locally deformed, the warp detection line and the weft detection line are locally deformed and squeezed, the warp detection line and the weft detection line are acted on the corresponding warp strain gauge and the weft strain gauge, and then the reservoir leakage detection device is connected with a circuit, so that the leakage point can be accurately positioned, the detection structure is simpler, the cost is lower, the reservoir leakage detection device can be better applied to scenes with low water flow speed or small leakage point dispersion, and the detection precision and the detection efficiency are improved.
Description
Technical Field
The invention relates to the technical field of water conservancy facilities, in particular to a reservoir leakage detection device and a detection method thereof.
Background
The reservoir is used as a hydraulic engineering facility for flood control, water storage and water flow regulation, and can play roles in flood control, water storage irrigation, water supply, power generation, fish culture and the like. The seepage is a common problem of the disease risk reservoirs, the serious seepage problem is directly related to the safety of the dam, and the method is very important for the disease risk reservoirs to more accurately and intuitively find out the seepage positions, the seepage points, the seepage direction and the seepage degree.
In the prior art, the leakage detection methods of reservoirs and hydropower stations mainly comprise a tracing method, a drilling water injection test method, a flow rate test method, a sonar method and other geophysical prospecting methods, however, for the scenes of low water flow speed or scattered leakage points and small seepage of single leakage points, the detection methods cannot achieve good detection effect due to limited detection accuracy, and the leakage state cannot be intuitively observed. For example, a tracer method is generally used to estimate the seepage velocity by injecting a tracer into the upstream side of a portion to be inspected and observing whether or not the tracer is present in a portion likely to leak. The method can only achieve rough judgment, has poor accuracy, complex process and low detection efficiency. In addition, in the above detection method, some of the detection methods even need to detect by secondary drilling, damage is caused to the reservoir structure, and the influence on the operation of the reservoir is large when the water quality of the reservoir is turbid, so that it is highly desirable to provide a leakage detection device suitable for a large-area reservoir.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that reservoir leakage detection cannot be applied to a large-area reservoir in the prior art, so as to provide the reservoir leakage detection device capable of effectively detecting the leakage of the large-area reservoir.
The invention aims to overcome the defect that reservoir leakage detection cannot be applied to a large-area reservoir in the prior art, and further provides a reservoir leakage detection method capable of effectively detecting the leakage of the large-area reservoir.
In order to solve the technical problems, the invention provides a reservoir leakage detection device, which comprises:
a fixed frame surrounding the frame to form a frame structure;
the warp detection lines and the weft detection lines are respectively distributed in the fixed frame along the warp direction and the weft direction;
the strain gauge is connected with the warp detection line;
the weft strain gauge is connected with the weft detection line;
and the geomembrane is covered in the fixed frame and is attached to the warp detection line and the weft detection line.
Optionally, the number of the warp detection lines is multiple, and each warp detection line is connected with a strain gauge; the number of the weft detection lines is multiple, and each weft detection line is connected with a weft strain gauge.
Optionally, the warp detection line and/or the weft detection line are embedded into the geomembrane.
Optionally, the reservoir leak detection apparatus further includes: and the clamping part is arranged on the fixed frame and is suitable for fixedly connecting the reservoir leakage detection device with an external structure.
Optionally, the reservoir leak detection apparatus further includes: and each warp strain gauge is electrically connected with one power output branch circuit on the switching circuit respectively, and each weft strain gauge is electrically connected with one power output branch circuit on the switching circuit respectively.
Optionally, the reservoir leak detection apparatus further includes:
the current sensor is electrically connected with the switch circuit;
a power supply electrically connected with the current sensor;
and the input end of the controller is electrically connected with the current sensor, and the output end of the controller is electrically connected with the switch circuit.
The reservoir leakage detection method provided by the invention is applied to the reservoir leakage detection device, and comprises the following steps:
s1: the reservoir leakage detection device is attached to a reservoir dam body;
s2: the control switch circuit sends out current signals to the warp strain gauge and the weft strain gauge one by one;
s3: receiving feedback signals, and judging whether each feedback signal is lower than a threshold value;
s4: if a feedback signal lower than a threshold value exists, acquiring the crossing position of a warp strain gauge and a weft strain gauge which generate the feedback signal;
s5: the leak location information is stored.
Optionally, before the reservoir leakage detection device is placed in a manner of being attached to the reservoir dam body, the method further includes:
dividing the reservoir dam body into N detection areas, wherein each detection area is matched with the detection area of the reservoir leakage detection device;
and (3) placing the reservoir leakage detection device in sequence from the 1 st to the N th detection areas, and repeatedly executing the steps S1 to S5.
Optionally, the method further comprises:
acquiring the position information of N detection areas and the leakage position information corresponding to the detection areas;
and generating a reservoir dam leakage position schematic diagram based on the detection area and the leakage position information.
The technical scheme of the invention has the following advantages:
1. according to the reservoir leakage detection device provided by the invention, the warp detection line and the weft detection line are respectively arranged in the warp direction and the weft direction of the fixed frame, the warp detection line is connected with the warp strain gauge, the weft detection line is connected with the weft strain gauge, when leakage or piping occurs to a dam body, the leakage part water flows outwards, the leakage part can squeeze the geomembrane, so that the geomembrane is locally deformed, the warp detection line and the weft detection line are locally deformed and squeezed, the warp detection line and the weft detection line are acted on the corresponding warp strain gauge and the weft strain gauge, and then the reservoir leakage detection device is connected with a circuit, so that the leakage point can be accurately positioned, the detection structure is simpler, the cost is lower, the reservoir leakage detection device can be better applied to scenes with low water flow speed or small leakage point dispersion, and the detection precision and the detection efficiency are improved.
2. According to the reservoir leakage detection method provided by the invention, the current signals are sent to the warp strain gauge and the weft strain gauge, the feedback signals are received, whether each feedback signal is lower than the threshold value is judged, if the feedback signals lower than the threshold value exist, the crossing position of the warp strain gauge and the weft strain gauge for generating the feedback signals is obtained, and then the position with pressure change is determined as the leakage position, so that the leakage point can be accurately positioned, the detection method is simpler, the cost is lower, and the detection method can be better applied to the scenes with low water flow speed or scattered leakage points and small leakage flow of single leakage point, and the detection precision and the detection efficiency are improved.
3. According to the reservoir leakage detection method provided by the invention, the area of the single reservoir leakage detection device is small, and all areas of the reservoir dam body cannot be covered at one time, so that in order to measure leakage points of all areas of the reservoir dam body, the reservoir dam body can be divided into a plurality of detection areas and the reservoir leakage detection devices are adopted to detect one by one, and therefore, the detection of all areas of the reservoir dam body can be completed by utilizing the single reservoir leakage detection device or the plurality of reservoir leakage detection devices, the production cost is low, the application range is wide, the adaptability is strong, and the detection of the leakage points of the reservoir dam body with a larger area is convenient to realize.
4. According to the reservoir leakage detection method provided by the invention, after all N detection areas are detected, the position information of each detection area is acquired one by one, and the leakage position information on each position information is used, so that a reservoir dam leakage position schematic diagram can be conveniently generated by using computer software after summarization, leakage positions are further visually displayed, a solution is conveniently generated, and a worker is conveniently guided to maintain the reservoir dam.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a large area reservoir leak detection control device of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is an enlarged view of FIG. 1 at B;
FIG. 4 is a circuit diagram of a large area reservoir leak detection control device of the present invention.
Reference numerals illustrate:
the device comprises a 1-fixed frame, a 2-data transmission line, a 3-clamping part, a 4-warp strain gauge, a 5-warp detection line, a 6-weft detection line, a 7-weft strain gauge and an 8-geomembrane.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
Referring to fig. 1 to 4, the reservoir leakage detection apparatus according to the present embodiment includes:
a fixed frame 1, which is surrounded to form a frame structure;
the warp detection lines 5 and the weft detection lines 6 are respectively distributed in the fixed frame 1 along the warp direction and the weft direction;
the strain gauge 4 is connected with the warp detection line 5;
the weft strain gauge 7 is connected with the weft detection line 6;
and the geomembrane 8 is covered in the fixed frame 1 and is attached to the warp detection line 5 and the weft detection line 6.
Preferably, the warp strain gauge 4 and the weft strain gauge 7 are both fixed to the fixing frame 1. In this embodiment, the fixing frame 1 is configured as a quadrilateral frame, wherein one of any two adjacent frames is fixed with a plurality of warp strain gauges 4, and the other frame is fixed with a plurality of weft strain gauges 7.
One end of the warp direction detection line 5 is connected with the warp strain gauge 4, the other end of the warp direction detection line is connected to the frame opposite to the frame fixed with the warp strain gauge 4, and similarly, one end of the weft direction detection line 6 is connected with the weft strain gauge 7, and the other end of the weft direction detection line is connected to the frame opposite to the frame fixed with the weft strain gauge 7; so that the warp direction detection lines 5 and the weft direction detection lines 6 are staggered in the fixed frame 1.
Specifically, the number of the warp detection lines 5 is multiple, and each warp detection line 5 is connected with one strain gauge 4; the number of the weft detection lines 6 is multiple, and each weft detection line 6 is connected with a weft strain gauge 7.
Preferably, the warp direction detection lines 5 and the weft direction detection lines 6 are uniformly distributed in the fixing frame 1, the distance between every two adjacent warp direction detection lines 5 is equal, and the distance between every two adjacent weft direction detection lines 6 is also equal.
According to the reservoir leakage detection device provided by the embodiment, the warp detection line 5 and the weft detection line 6 are respectively arranged in the warp direction and the weft direction of the fixed frame 1, the warp detection line 5 is connected with the warp strain gauge 4, the weft detection line 6 is connected with the weft strain gauge 7, when leakage or piping occurs to a dam body, water flows in the leakage part move outwards, the leakage part can squeeze a geomembrane, the geomembrane is further caused to locally deform, the warp detection line 5 and the weft detection line 6 are locally deformed and extruded, the warp detection line 5 and the weft detection line 6 are further acted on the corresponding warp strain gauge and the weft strain gauge, and after the reservoir leakage detection device is connected with a circuit, leakage points can be accurately positioned, the detection structure is simple, the cost is low, and the reservoir leakage detection device can be well applied to scenes with low water flow speed or leakage point dispersion and small leakage flow of single leakage point, and detection precision and detection efficiency are improved.
As various implementation forms of the reservoir leak detection apparatus provided in this embodiment, when the area of the reservoir leak detection apparatus is small, measurement of a small area can be achieved; when the area of the single block is larger, the leakage detection of the large-area reservoir dam body can be realized through the large-area geomembrane, and the large-area reservoir dam body can be accurately positioned, so that the large-area reservoir dam body can be better applied to the scenes with low water flow speed or scattered leakage points and small leakage flow of the single leakage point, and the detection precision and the detection efficiency are improved.
In addition, when reservoir seepage detection device monolithic area is less, can also adopt the form of polylith concatenation, and then form great detection area through the concatenation, make things convenient for mill batch processing, improve production convenience.
As another form, when the area of the single block of the reservoir leakage detection device is smaller, the reservoir or the dam body can be divided into areas, and the single block of the reservoir leakage detection device is repeatedly placed, so that the detection of a larger area is realized under the condition of repeated measurement, and the production cost is saved.
Specifically, the warp direction detection lines 5 and/or weft direction detection lines 6 are embedded in the geomembrane 8. Preferably, the warp direction detection lines 5 and the weft direction detection lines 6 are slidably embedded in the geomembrane 8.
Specifically, the reservoir leak detection apparatus further includes: and the clamping part 3 is arranged on the fixed frame 1 and is suitable for fixedly connecting the reservoir leakage detection device with an external structure.
Preferably, a data transmission line 2 is mounted on the fixed frame, one end of the data transmission line 2 is electrically connected with the warp strain gauge 4 and the weft strain gauge 7, and the other end is electrically connected with a switch circuit.
Specifically, the reservoir leak detection apparatus further includes: and each warp strain gauge 4 is electrically connected with one power output branch circuit of the switching circuit, and each weft strain gauge 7 is electrically connected with one power output branch circuit of the switching circuit.
Specifically, the reservoir leak detection apparatus further includes:
the current sensor is electrically connected with the switch circuit;
a power supply electrically connected with the current sensor;
and the input end of the controller is electrically connected with the current sensor, and the output end of the controller is electrically connected with the switch circuit.
Example two
Referring to fig. 1, this embodiment provides a reservoir leakage detection method, which is applied to the reservoir leakage detection apparatus according to the first embodiment, and includes:
s1: and the reservoir leakage detection device is attached to the reservoir dam body.
In the specific implementation process, as the reservoir dam body to be detected is often positioned below the water surface, the reservoir leakage detection device needs to be placed at a preset position by means of manual or mechanical equipment, so that the follow-up detection work is conveniently carried out.
Preferably, the geomembrane is in close contact with the inner wall of the reservoir dam body, so that the accuracy of the detection effect is ensured.
S2: the control switch circuit sends out current signals to the warp strain gauge and the weft strain gauge one by one.
Preferably, the controller sends out a control signal to control the switching circuit to send out current signals to each warp strain gauge and weft strain gauge one by one. Preferably, the emitted current signal is a constant value.
S3: and receiving feedback signals, and judging whether each feedback signal is lower than a threshold value.
Due to the characteristics of the strain gauge, when the strain gauge is mechanically deformed under the action of external force, the resistance value of the strain gauge correspondingly changes. When the dam body leaks or piping, the leakage part water flows outwards, the leakage part can squeeze the geomembrane, and then the geomembrane is locally deformed, the warp detection line 5 and the weft detection line 6 are locally deformed and squeezed, and then the warp detection line 5 and the weft detection line 6 act on corresponding warp strain gauges and weft strain gauges, so that feedback signals of the strain gauges at corresponding positions change. Taking the feedback signal as an example, at this time, since the resistance value of the corresponding strain gauge becomes larger, the current becomes smaller, and when the current is smaller than the threshold value, it can be reversely determined that the pressure change exists at the position of the intersection point of the warp detection line 5 and the weft detection line 6 corresponding to the strain gauge, and thus the leakage point can be accurately positioned.
Optionally, the current information of the warp strain gauge 4 and the weft strain gauge 7 is collected by a current sensor and fed back to the controller by the current sensor, so that the controller can judge whether each feedback signal is lower than a threshold value after receiving the feedback signals.
S4: if a feedback signal below a threshold value exists, the crossing position of the warp strain gauge and the weft strain gauge generating the feedback signal is obtained.
The position of the intersection of the warp detection line 5 and the weft detection line 6 corresponding to the warp and weft strain gauges that generate a feedback signal below the threshold value is the position where the pressure change exists, and this position can be determined as the leakage position. Leakage position information of the leakage position is acquired by a controller.
S5: the leak location information is stored.
The leakage position information is stored in the controller or in a corresponding memory module of the controller.
According to the reservoir leakage detection method, the current signals are sent to the warp strain gauge and the weft strain gauge, the feedback signals are received, whether each feedback signal is lower than the threshold value is judged, if the feedback signals lower than the threshold value exist, the crossing position of the warp strain gauge and the weft strain gauge for generating the feedback signals is obtained, and then the position with pressure change is determined as the leakage position, so that the leakage point can be accurately positioned, the detection method is simple, the cost is low, the method can be better applied to scenes with low water flow speed or scattered leakage points and small leakage flow of single leakage point, and the detection precision and the detection efficiency are improved.
Specifically, before the reservoir leakage detection device is placed in a fitting manner with the reservoir dam body, the method further comprises the following steps:
s11: dividing the reservoir dam body into N detection areas, wherein each detection area is matched with the detection area of the reservoir leakage detection device;
s12: and (3) placing the reservoir leakage detection device in sequence from the 1 st to the N th detection areas, and repeatedly executing the steps S1 to S5.
According to the reservoir leakage detection method provided by the embodiment, as the area of the single reservoir leakage detection device is smaller, all areas of the reservoir dam body cannot be covered at one time, in order to measure leakage points of all areas of the reservoir dam body, the reservoir dam body can be divided into a plurality of detection areas and the reservoir leakage detection devices are adopted to detect one by one, so that the detection of all areas of the reservoir dam body can be completed by utilizing the single reservoir leakage detection device or the plurality of reservoir leakage detection devices, the production cost is low, the application range is wide, the adaptability is strong, and the detection of the leakage points of the reservoir dam body with a large area is convenient to realize.
Preferably, the reservoir dam body is divided into N detection areas, and each detection area is matched with the detection area of the reservoir leakage detection device, so that comprehensive detection of the reservoir dam body is ensured, and omission is avoided.
Preferably, after the detection of the 1 st detection area is completed, the reservoir leakage detection device can be placed in the adjacent area of the 1 st detection area again through mechanical equipment, and then the steps S1 to S5 are repeatedly executed until the detection of the N-th detection area is completed by the reservoir leakage detection device, so that the whole coverage of the inner wall of the whole reservoir dam body is realized, the whole detection of the reservoir dam body is ensured, and omission is avoided.
Specifically, the method further comprises:
s6: and acquiring the position information of N detection areas and the leakage position information corresponding to the detection areas.
S7: and generating a reservoir dam leakage position schematic diagram based on the detection area and the leakage position information.
According to the reservoir leakage detection method provided by the embodiment, after all detection of N detection areas is completed, the position information of each detection area is acquired one by one, and the leakage position information on each position information is used, so that a reservoir dam leakage position schematic diagram can be conveniently generated by using computer software after summarization, leakage positions are further visually displayed, a solution is convenient to generate, and workers are conveniently guided to maintain the reservoir dam.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. A reservoir leak detection apparatus, comprising:
a fixed frame (1) which surrounds and forms a frame structure;
the warp detection lines (5) and the weft detection lines (6) are respectively distributed in the fixed frame (1) along the warp direction and the weft direction;
is connected with the warp detection line (5) through a strain gauge (4);
the weft strain gauge (7) is connected with the weft detection line (6);
the geomembrane (8) is covered in the fixed frame (1) and is adhered to the warp detection line (5) and the weft detection line (6);
the number of the warp detection lines (5) is multiple, and each warp detection line (5) is connected with a strain gauge (4); the number of the weft detection lines (6) is multiple, and each weft detection line (6) is connected with a weft strain gauge (7);
the reservoir leak detection apparatus further includes: the warp strain gauge (4) is respectively and electrically connected with one power output branch circuit on the switching circuit, and the weft strain gauge (7) is respectively and electrically connected with one power output branch circuit on the switching circuit;
the reservoir leak detection apparatus further includes:
the current sensor is electrically connected with the switch circuit;
a power supply electrically connected with the current sensor;
the input end of the controller is electrically connected with the current sensor, and the output end of the controller is electrically connected with the switch circuit;
and sending current signals to the warp strain gauge (4) and the weft strain gauge (7), receiving feedback signals, judging whether each feedback signal is lower than a threshold value, and if the feedback signal is lower than the threshold value, acquiring the crossing position of the warp strain gauge (4) and the weft strain gauge (7) which generate the feedback signals, and positioning a leakage point.
2. Reservoir leak detection arrangement according to claim 1, characterized in that the warp detection lines (5) and/or weft detection lines (6) are embedded inside the geomembrane (8).
3. The reservoir leak detection apparatus as defined in claim 1, wherein the reservoir leak detection apparatus further comprises: and the clamping part (3) is arranged on the fixed frame (1) and is suitable for fixedly connecting the reservoir leakage detection device with an external structure.
4. A method of reservoir leak detection employing a reservoir leak detection apparatus as claimed in any one of claims 1 to 3, the method comprising:
s1: the reservoir leakage detection device is attached to a reservoir dam body;
s2: the control switch circuit sends out current signals to the warp strain gauge and the weft strain gauge one by one;
s3: receiving feedback signals, and judging whether each feedback signal is lower than a threshold value;
s4: if a feedback signal lower than a threshold value exists, acquiring the crossing position of a warp strain gauge and a weft strain gauge which generate the feedback signal;
s5: the leak location information is stored.
5. The reservoir leak detection method as defined in claim 4, further comprising, prior to said positioning the reservoir leak detection apparatus in engagement with a reservoir dam:
dividing the reservoir dam body into N detection areas, wherein each detection area is matched with the detection area of the reservoir leakage detection device;
and (3) placing the reservoir leakage detection device in sequence from the 1 st to the N th detection areas, and repeatedly executing the steps S1 to S5.
6. The reservoir leak detection method as defined in claim 5, further comprising:
acquiring the position information of N detection areas and the leakage position information corresponding to the detection areas;
and generating a reservoir dam leakage position schematic diagram based on the detection area and the leakage position information.
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| CN113284636A (en) * | 2021-05-14 | 2021-08-20 | 深圳市行健自动化股份有限公司 | Nuclear power pipeline and leakage monitoring system and method thereof |
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