CN114509217A - Reservoir leakage detection device and detection method thereof - Google Patents
Reservoir leakage detection device and detection method thereof Download PDFInfo
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- CN114509217A CN114509217A CN202210079161.9A CN202210079161A CN114509217A CN 114509217 A CN114509217 A CN 114509217A CN 202210079161 A CN202210079161 A CN 202210079161A CN 114509217 A CN114509217 A CN 114509217A
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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
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 lines and the weft detection lines are respectively arranged in the warp direction and the weft direction of the fixing frame, the warp detection lines are connected with the warp strain gauges, the weft detection lines are connected with the weft strain gauges, when a dam body leaks or piping occurs, part of leaked water flows move outwards, the leaked parts can extrude a geomembrane, local deformation of the geomembrane is further caused, the warp detection lines and the weft detection lines are extruded by the local deformation, and then the warp detection lines and the weft detection lines act on the corresponding warp strain gauges and the corresponding weft strain gauges, so that the leakage points can be accurately positioned after the reservoir leakage detection device is connected with a circuit.
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 blocking and storing flood and adjusting water flow, and can play a role in flood control, water storage irrigation, water supply, power generation, fish culture and the like. The leakage is a common problem of dangerous reservoirs, the serious leakage problem is directly related to the safety of the dam, and the method is very important for checking the leakage position, the leakage point, the leakage direction and the leakage degree of the dangerous reservoirs more accurately and more intuitively.
In the prior art, the leakage detection method of reservoirs and hydropower stations mainly comprises a tracing method, a drilling water injection test method, a flow velocity test method, a sonar method and other object detection methods, however, for scenes with low water flow velocity, dispersed leakage points and small leakage flow of a single leakage point, the detection method often cannot achieve a good detection effect due to limited detection precision and cannot visually observe the leakage state. In the case of the tracer method, usually, a tracer is injected upstream of a site to be examined, and presence or absence of the tracer is observed at a site likely to leak, so that the site likely to leak is determined, and a seepage velocity is estimated. The method can only realize rough judgment, and has poor accuracy, complex process and low detection efficiency. In addition, some of the above detection methods need secondary drilling for detection, which damages the structure of the reservoir and greatly affects the operation of the reservoir when the water quality of the reservoir is turbid, so that it is urgently needed 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 the reservoir leakage detection in the prior art cannot be applied to a large-area reservoir, so that the reservoir leakage detection device capable of effectively detecting the leakage of the large-area reservoir is provided.
The invention aims to solve another technical problem of overcoming the defect that the reservoir leakage detection in the prior art cannot be applied to a large-area reservoir, thereby providing a reservoir leakage detection method capable of effectively detecting the leakage of the large-area reservoir.
In order to solve the above technical problem, the present invention provides a reservoir leakage detection apparatus, comprising:
the fixing frame surrounds to form a frame-shaped structure;
the warp detection lines and the weft detection lines are distributed in the fixed frame along the warp direction and the weft direction respectively;
the warp detection lines are connected with the warp strain gauges;
the weft strain gauge is connected with the weft detection line;
and the geomembrane covers the fixed frame and is attached to the warp detection lines and the weft detection lines.
Optionally, the number of the warp detection lines is multiple, and each warp detection line is connected with one warp 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 lines and/or the weft detection lines are embedded in the geomembrane.
Optionally, the reservoir seepage detection device further comprises: 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 seepage detection device further comprises: and each warp strain gauge is electrically connected with one power output branch on the switch circuit, and each weft strain gauge is electrically connected with one power output branch on the switch circuit.
Optionally, the reservoir seepage detection device further comprises:
a current sensor electrically connected to the switching circuit;
a power source electrically connected to 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 invention provides a reservoir leakage detection method, which applies the reservoir leakage detection device and comprises the following steps:
s1: the reservoir leakage detection device is placed in a manner of being attached to a reservoir dam body;
s2: controlling a switch circuit to send 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 the feedback signal lower than the threshold exists, acquiring the crossing position of a warp strain gauge and a weft strain gauge generating the feedback signal;
s5: leak location information is stored.
Optionally, before will reservoir seepage detection device and the laminating of reservoir dam body are placed, still include:
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;
the reservoir leakage detecting devices are sequentially placed from the 1 st to the Nth detection areas, and the steps S1 to S5 are repeatedly performed.
Optionally, the method further includes:
acquiring position information of N detection areas and leakage position information corresponding to the detection areas;
and generating a reservoir dam body 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. the reservoir seepage detection device provided by the invention has the advantages that the warp detection lines and the weft detection lines are respectively arranged in the warp direction and the weft direction of the fixing frame, the warp detection lines are connected with the warp strain gauges, the weft detection lines are connected with the weft strain gauges, when the dam body leaks or piping occurs, the leaked water flows move outwards, the leaking part can extrude the geomembrane, thereby causing local deformation of the geomembrane, extruding the warp detection lines and the weft detection lines by the local deformation, and further acting the warp detection lines and the weft detection lines on the corresponding warp strain gages and weft strain gages, and then make reservoir seepage detection device connect the circuit after, can pinpoint the leakage point, detect that the structure is comparatively simple, the cost is lower, can be better be applied to not big or the dispersion of leakage point, the less scene of single leakage point seepage flow of velocity of water, improve detection accuracy and detection efficiency.
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 or not is judged, if the feedback signal lower than the threshold value exists, the crossing position of the warp strain gauge and the weft strain gauge 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, dispersed leakage points and small leakage flow of a 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, 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 the 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 can be used for detecting one by one, so that the detection of all areas of the reservoir dam body can be completed by using the single or a plurality of reservoir leakage detection devices, the production cost is low, the application range is wide, the adaptability is strong, and the leakage point detection 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 the N detection areas are all 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 the reservoir dam leakage position schematic diagram can be conveniently generated by using computer software after the summary, the leakage position can be visually displayed, a solution can be conveniently generated, and the maintenance of the reservoir dam by workers can be conveniently guided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a large-area reservoir seepage detection control device according to 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 connection diagram of the leakage detection control device for a large-area reservoir of the invention.
Description of reference numerals:
the device comprises a fixing frame 1, a data transmission line 2, a clamping part 3, a warp strain gauge 4, a warp detection line 5, a weft detection line 6, a weft strain gauge 7 and a geomembrane 8.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
Referring to fig. 1 to 4, the present embodiment provides a reservoir leakage detecting apparatus, including:
the fixing frame 1 surrounds to form a frame-shaped 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 warp detection lines 5 are connected with the strain gauges 4;
the weft strain gauge 7 is connected with the weft detection line 6;
and the geomembrane 8 covers the fixed frame 1 and is attached to the warp detection lines 5 and the weft detection lines 6.
Preferably, the warp strain gauge 4 and the weft strain gauge 7 are both fixed on the fixing frame 1. In this embodiment, the fixing frame 1 is configured as a quadrangular frame, wherein a plurality of warp strain gauges 4 are fixed on one of any two adjacent frames, and a plurality of weft strain gauges 7 are fixed on the other frame.
One end of the warp detection line 5 is connected with the warp strain gauge 4, the other end of the warp 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 detection line 6 is connected with the weft strain gauge 7, and the other end of the weft detection line is connected to the frame opposite to the frame fixed with the weft strain gauge 7; so that the warp detection lines 5 and the weft detection lines 6 are distributed staggered inside 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 warp strain gauge 4; the number of the weft detection lines 6 is multiple, and each weft detection line 6 is connected with one weft strain gauge 7.
Preferably, the warp detection lines 5 and the weft detection lines 6 are uniformly distributed on the fixed frame 1, the distance between every two adjacent warp detection lines 5 is equal, and the distance between every two adjacent weft detection lines 6 is also equal.
The reservoir seepage detection device provided by the embodiment has the advantages that the warp detection lines 5 and the weft detection lines 6 are respectively arranged in the warp direction and the weft direction of the fixed frame 1, and the warp detection lines 5 are connected with the warp strain gauges 4, the weft detection lines 6 are connected with the weft strain gauges 7, when the dam body leaks or piping occurs, the leaked water flows move outwards, the leaking part can extrude the geomembrane, thereby causing local deformation of the geomembrane, extruding the warp detection lines 5 and the weft detection lines 6 through the local deformation, and then the warp detection lines 5 and the weft detection lines 6 act on the corresponding warp strain gages and weft strain gages, and then make reservoir seepage detection device connect the circuit after, can pinpoint the leakage point, detect that the structure is comparatively simple, the cost is lower, can be better be applied to not big or the dispersion of leakage point, the less scene of single leakage point seepage flow of velocity of water, improve detection accuracy and detection efficiency.
As various implementation forms of the reservoir leakage detection device provided by the embodiment, when the area of a single block of the reservoir leakage detection device is small, measurement in a small area can be realized; when the single block is large in area, the leakage detection of the large-area reservoir dam body can be realized by a single time through the large-area geomembrane, the positioning can be accurately realized, the method can be better applied to scenes with low water flow speed, dispersed leakage points and small leakage flow of a single leakage point, and the detection precision and the detection efficiency are improved.
In addition, when the single block area of the reservoir leakage detection device is small, a form of splicing a plurality of blocks can be adopted, and then a large detection area is formed by splicing, so that the device is convenient for batch processing of factories, and the production convenience is improved.
As another form, when the single area of the reservoir leakage detection device is small, the reservoir or the dam body can be divided into regions, and the single reservoir leakage detection device is repeatedly placed, so that detection in a large area is realized under multiple measurements, and the production cost is saved.
Specifically, the warp detection lines 5 and/or weft detection lines 6 are embedded inside the geomembrane 8. Preferably, the warp detection lines 5 and the weft detection lines 6 are slidably embedded in the geomembrane 8.
Specifically, the reservoir leakage detection device 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, the fixing frame is provided with a data transmission line 2, 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 of the data transmission line is electrically connected with the switch circuit.
Specifically, the reservoir leakage detection device further includes: and each warp strain gauge 4 is electrically connected with one power output branch on the switch circuit, and each weft strain gauge 7 is electrically connected with one power output branch on the switch circuit.
Specifically, the reservoir leakage detection device further includes:
a current sensor electrically connected to the switching circuit;
a power source electrically connected to 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, the present embodiment provides a method for detecting reservoir leakage, which applies the apparatus according to the first embodiment, and the method includes:
s1: and (4) placing the reservoir leakage detection device in a manner of being attached to a reservoir dam body.
In the specific implementation process, because the reservoir dam body to be detected is often located below the water surface, the reservoir leakage detection device needs to be placed at a preset position by means of manual or mechanical equipment, and then the subsequent detection work is conveniently carried out.
Preferably, the geomembrane can be in close contact with the inner wall of the reservoir dam body so as to ensure the accuracy of the detection effect.
S2: the control switch circuit sends 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 switch circuit to send out current signals to each warp strain gauge and each 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 is correspondingly changed. When the dam body leaks or piping, the leakage part water flow moves outwards, the leakage part can extrude the geomembrane, and then local deformation of the geomembrane is caused, the warp detection lines 5 and the weft detection lines 6 are extruded through local deformation, and then the warp detection lines 5 and the weft detection lines 6 are used on the corresponding warp strain gages and weft strain gages, so that the feedback signals of the strain gages at the corresponding positions are changed. The feedback signal is still a current signal as an example, at the moment, because the resistance value of the corresponding strain gauge becomes large, the current becomes small, and when the current is smaller than the threshold value, the pressure change at the intersection position of the warp detection line 5 and the weft detection line 6 corresponding to the strain gauge can be reversely determined, so that the leakage point can be accurately positioned.
Optionally, the current information of the warp strain gage 4 and the weft strain gage 7 is collected by a current sensor and fed back to the controller by the current sensor, so that the controller determines whether each feedback signal is lower than a threshold value after receiving the feedback signal.
S4: and if the feedback signal lower than the threshold value exists, acquiring the crossing position of the warp strain gauge and the weft strain gauge generating the feedback signal.
The crossing point position of the warp detection line 5 and the weft detection line 6 corresponding to the warp strain gauge and the weft strain gauge generating the feedback signal lower than the threshold value is the position where the pressure change exists, and the position can be determined as the leakage position. Leakage position information of the leakage position is acquired by a controller.
S5: leak location information is stored.
The leakage position information is stored in the controller or a storage module corresponding to the controller.
According to the reservoir leakage detection method provided by the embodiment, 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 or not is judged, if the feedback signal lower than the threshold value exists, the cross position of the warp strain gauge and the weft strain gauge generating the feedback signals is obtained, the position with pressure change is determined as the leakage position, 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 dispersed leakage points and small leakage flow of a single leakage point, and the detection precision and the detection efficiency are improved.
Specifically, before will reservoir seepage detection device and the laminating of reservoir dam body are placed, still include:
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: the reservoir leakage detecting devices are sequentially placed from the 1 st to the Nth detection areas, and the steps S1 to S5 are repeatedly performed.
According to the reservoir leakage detection method provided by the embodiment, as the area of the single reservoir leakage detection device is small, all areas of the reservoir dam cannot be covered at one time, in order to measure the leakage points of all the areas of the reservoir dam, the reservoir dam can be divided into a plurality of detection areas and the reservoir leakage detection devices can be used for detecting one by one, so that the detection of all the areas of the reservoir dam can be completed by using the single or a 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 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 on the reservoir dam body is guaranteed, 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 reservoir leakage detection device completes the detection of the Nth detection area, so that the comprehensive coverage of the inner wall of the whole reservoir dam is realized, the comprehensive detection of the reservoir dam is ensured, and omission is avoided.
Specifically, the method further comprises:
s6: and acquiring the position information of the N detection areas and the leakage position information corresponding to the detection areas.
S7: and generating a reservoir dam body 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 the N detection areas are completely detected, the position information of each detection area is acquired one by one, and the leakage position information on each position information is obtained, so that the reservoir dam leakage position schematic diagram can be generated conveniently by using computer software after the summary, the leakage position is displayed visually, a solution is generated conveniently, and a worker is guided to maintain the reservoir dam conveniently.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A reservoir leak detection device, comprising:
the fixing frame (1) surrounds to form a frame-shaped 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 warp strain gauge (4) is connected with the warp detection lines (5);
the weft strain gauge (7) is connected with the weft detection line (6);
and the geomembrane (8) covers the fixed frame (1), and is attached to the warp detection lines (5) and the weft detection lines (6).
2. The reservoir seepage detection apparatus according to claim 1, wherein the number of the warp detection lines (5) is multiple, and each warp detection line (5) is connected with a warp strain gauge (4); the number of the latitudinal detection lines (6) is multiple, and each latitudinal detection line (6) is connected with a latitudinal strain gauge (7).
3. The reservoir leak detection device according to claim 1, wherein the warp detection lines (5) and/or weft detection lines (6) are embedded inside the geomembrane (8).
4. The apparatus of claim 1, further comprising: 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.
5. The apparatus of any one of claims 1 to 4, further comprising: and each warp strain gauge (4) is electrically connected with one power output branch on the switch circuit, and each weft strain gauge (7) is electrically connected with one power output branch on the switch circuit.
6. The apparatus of claim 5, further comprising:
a current sensor electrically connected to the switching circuit;
a power source electrically connected to 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.
7. A method for detecting a leakage from a reservoir, using the apparatus of any one of claims 1 to 6, the method comprising:
s1: the reservoir leakage detection device is placed in a manner of being attached to a reservoir dam body;
s2: controlling a switch circuit to send 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 the feedback signal lower than the threshold exists, acquiring the crossing position of a warp strain gauge and a weft strain gauge generating the feedback signal;
s5: leak location information is stored.
8. The method of claim 7, further comprising, prior to placing the device in close contact with the dam of the reservoir:
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;
the reservoir leakage detecting devices are sequentially placed from the 1 st to the Nth detection areas, and the steps S1 to S5 are repeatedly performed.
9. The method of claim 8, further comprising:
acquiring position information of N detection areas and leakage position information corresponding to the detection areas;
and generating a reservoir dam body leakage position schematic diagram based on the detection area and the leakage position information.
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