CN109915740B - Pipeline leakage detection device and detection method - Google Patents
Pipeline leakage detection device and detection method Download PDFInfo
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- CN109915740B CN109915740B CN201910370667.3A CN201910370667A CN109915740B CN 109915740 B CN109915740 B CN 109915740B CN 201910370667 A CN201910370667 A CN 201910370667A CN 109915740 B CN109915740 B CN 109915740B
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Abstract
The invention discloses a detection device and a detection method for pipeline leakage. The surface acoustic wave detection device of the detection device is connected with the power generation device through a connector, and the upper side of the surface acoustic wave detection device is fixed on the inner wall of the upper side of the pipeline to be detected; the surface acoustic wave sensor of the surface acoustic wave detection device is attached to the inner wall of the upper side of the pipeline to be detected, the signal input end of the controller is connected with the output end of the surface acoustic wave sensor, and the output end of the energy accumulator is connected with the surface acoustic wave sensor and the power supply ends of the controller; the magnet of the power generation device is arranged opposite to the magnet of the surface acoustic wave detection device, the rotatable metal crawler belt is coated on the outer surface of a shell of the power generation device, and the plurality of metal wheel sheets are fixed on the rotatable metal crawler belt; the current generated by the metal wheel sheet is transmitted to the energy storage device through the connector and is converted and stored through the built-in power module. The invention can realize self-power generation and self-power supply, is convenient to use, and solves the problem that the existing underground pipeline is difficult to permeate, break and position.
Description
Technical Field
The invention relates to the field of pipeline detection, in particular to a pipeline leakage detection device and a pipeline leakage detection method.
Background
The detection of the permeation and the breakage of the pipeline is a difficult point at present, and the traditional detection generally adopts manual detection, dichotomy measurement and the like. The conventional pipeline detection method is simple, the detection effect is poor, equipment such as a battery needs to be replaced, the device cannot run for a long time, and the cost for replacing the battery is high.
Disclosure of Invention
The invention aims to provide a pipeline leakage detection device and a pipeline leakage detection method, which realize a long-time operation mode without human intervention in a self-powered mode so as to effectively solve the power supply problem and improve the detection precision.
In order to achieve the purpose, the invention provides the following scheme:
a device for detecting a leak in a pipe, comprising: the acoustic surface wave detection device comprises an acoustic surface wave detection device, a power generation device and a connector; the surface acoustic wave detection device is connected with the power generation device through the connector, the upper side of the surface acoustic wave detection device is fixed on the inner wall of the upper side of the pipeline to be detected, and the power generation device is positioned below the surface acoustic wave detection device;
the surface acoustic wave detection device comprises a surface acoustic wave sensor, an energy accumulator, a controller and a first magnet; the surface acoustic wave sensor is positioned on the upper side of the surface acoustic wave detection device, is attached to the inner wall of the upper side of the pipeline to be detected, and is used for detecting surface acoustic wave signals of fluid in the pipeline; the signal input end of the controller is connected with the output end of the surface acoustic wave sensor and used for detecting the leakage state of the pipeline according to the received surface acoustic wave signal; the output end of the energy accumulator is connected with both the power supply end of the surface acoustic wave sensor and the power supply end of the controller and is used for supplying power to the surface acoustic wave sensor and the controller;
the power generation device comprises a second magnet, a shell, a rotatable metal crawler and a plurality of metal wheel sheets; the second magnet is positioned in the shell of the power generation device, and the first magnet and the second magnet are arranged oppositely and used for generating a magnetic field; the rotatable metal crawler belt is coated on the outer surface of a shell of the power generation device, the rotatable metal crawler belt can rotate in the vertical direction, and the rotatable metal crawler belt positioned above the shell is positioned between the first magnet and the second magnet; the plurality of metal wheel sheets are fixed on the rotatable metal track;
when fluid between the surface acoustic wave detection device and the power generation device flows, the metal wheel sheet is pushed to drive the rotatable metal crawler to rotate; and the current generated by the metal wheel sheet is transmitted to the energy accumulator through the connector and is converted and stored through the built-in power module.
Optionally, the metal wheel sheet is fixed on the rotatable metal track through a rotating shaft, and the rotating shaft is rotatable in the horizontal direction.
Optionally, the rotation angle of the rotation shaft is 120 degrees, and the rotation angle corresponding to the metal wheel piece is 120 degrees.
Optionally, the acoustic surface wave detection device further comprises two drainage plates, wherein the two drainage plates are respectively located at two ends of the acoustic surface wave detection device; the first end of the drainage plate is attached to the bottom side of the surface acoustic wave detection device, and the second end of the drainage plate is located outside the surface acoustic wave detection device and inclines upwards.
Optionally, the connectors are circular rings, the number of the connectors is two, and the two connectors are respectively located on two sides of a magnetic field formed by the first magnet and the second magnet.
Optionally, the connector is internally made of a metal conductive material, and externally made of a non-metal and anti-corrosion material.
Optionally, the surface acoustic wave detection device further includes a signal transmission device, and the controller sends the detection result to an external signal receiving device through the signal transmission device.
The invention also provides a detection method of pipeline leakage, which adopts the detection device of pipeline leakage to detect, and the detection method of pipeline leakage comprises the following steps:
acquiring a sound wave signal acquired by a surface acoustic wave sensor and converting the sound wave signal into an electric signal;
calculating the distance from the leakage position of the pipeline to be detected to the surface wave sensor according to the transmission speed of the sound velocity in the pipeline to be detected, the loss ratio of the sound velocity in the fluid and the electric signal;
and determining the leakage position of the pipeline to be detected by combining the distance between the leakage position of the pipeline to be detected and the surface wave sensor, which is measured by the detection device for the leakage of the adjacent pipeline.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the self-powered generator realizes self-power generation by virtue of the movement of fluid, self-powers, does not need personnel intervention, runs for a long time, and does not need to change active equipment such as a battery and the like. In addition, the invention does not distinguish the flow direction of fluid and gas, is convenient to use, simultaneously combines a plurality of surface acoustic wave detection devices for simultaneous detection, can realize accurate positioning of leakage positions, and solves the problem of difficult positioning of permeation and fracture of the underground pipeline at present.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a device for detecting pipeline leakage according to the present invention;
FIG. 2 is a schematic view of the connection between a metal wheel and a rotating shaft in the device for detecting pipeline leakage according to the present invention;
FIG. 3 is a schematic circuit diagram of a device for detecting pipeline leakage according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a pipeline leakage detection device according to the present invention. As shown in fig. 1, the detection device for the pipeline leakage comprises a surface acoustic wave detection device 1, a power generation device 2 and a connector 3; surface acoustic wave detection device 1 passes through connector 3 with power generation facility 2 is connected, the upside of surface acoustic wave detection device 1 is fixed in the upside inner wall of waiting to detect the pipeline, power generation facility 2 is located the below of surface acoustic wave detection device 1, surface acoustic wave detection device 1 and power generation facility 2 set up relatively, form fluidic flow channel between the downside of surface acoustic wave detection device 1 and power generation facility 2 upside.
The surface acoustic wave detection device 1 comprises a surface acoustic wave sensor 1-1, an energy storage 1-2, a controller 1-3 and a first magnet 1-4, wherein the surface acoustic wave sensor 1-1, the energy storage 1-2, the controller 1-3 and the first magnet 1-4 are integrated into a whole, and can also be coated by a shell. The surface acoustic wave sensor 1-1 is positioned on the upper side of the surface acoustic wave detection device 1, is attached to the inner wall of the upper side of the pipeline to be detected, and is used for detecting surface acoustic wave signals of fluid in the pipeline; the signal input end of the controller 1-3 is connected with the output end of the surface acoustic wave sensor 1-1 and is used for detecting the leakage state of the pipeline according to the received surface acoustic wave signal; the output end of the energy accumulator 1-2 is connected with both the power supply end of the surface acoustic wave sensor 1-1 and the power supply end of the controller 1-3, and is used for supplying power to the surface acoustic wave sensor 1-1 and the controller 1-3. The surface acoustic wave sensor 1-1 is a main body for detecting pipeline leakage, acoustic wave information of the inner wall of a pipeline is received and converted into electric information, the electric information is input into the controller 1-3 to be identified and processed, and the controller 1-3 is mainly used for receiving the electric information output by the surface acoustic wave sensor 1-1, identifying the electric information through an algorithm and determining the pipeline leakage state.
The power generation device 2 comprises a second magnet 2-1, a shell, a rotatable metal crawler 2-2 and a plurality of metal wheel sheets 2-3; the second magnet 2-1 is positioned inside the shell of the power generation device 2, and the first magnet 1-4 is arranged opposite to the second magnet 2-1 and used for generating a magnetic field; the rotatable metal track 2-3 is coated on the outer surface of the shell of the power generation device 2, the rotatable metal track 2-3 can rotate in the vertical direction, namely, the rotatable metal track rotates in the form of a vertical ellipse, and the part of the rotatable metal track 2-3 above the shell is positioned between the first magnet 1-4 and the second magnet 2-1; the metal wheel sheets 2-3 are fixed on the rotatable metal crawler 2-2 at intervals, and are preferably evenly distributed. When fluid between the surface acoustic wave detection device 1 and the power generation device 2 flows, the metal wheel sheets 2-3 are pushed to further drive the rotatable metal crawler 2-2 to rotate, the rotation process of the metal wheel sheets 2-3 cuts magnetic induction lines to form loop current, the generated current is transmitted to the energy accumulator 1-2 through the connector 3, and the current is stored through a built-in current collection and storage device.
In specific implementation, the power generation device of the present invention may further include a rotating shaft 2-4, as shown in fig. 2, and fig. 2 is a schematic diagram of a metal wheel sheet connected to the rotating shaft in the device for detecting pipeline leakage of the present invention. The metal wheel sheet 2-3 is fixed on the rotatable metal crawler belt 2-2 through a rotating shaft, and the rotating shaft 2-4 can rotate in the horizontal direction. The metal wheel sheet 2-3 is used as a metal part to generate current by cutting magnetic induction lines, the rotating shaft 2-4 is used for not distinguishing the flowing direction of fluid, the flowing direction of the fluid pushes the metal wheel sheet 2-3, and then the rotating shaft 2-4 rotates, so that the metal wheel sheet 2-3 faces to the direction more suitable for the flowing of the fluid. The rotation angle of the rotation shaft 2-4 is less than 180 degrees, for example, it can be set to 120 degrees, and the rotation angle of the corresponding metal wheel 2-3 is also 120 degrees, that is, the metal wheel 2-3 can only rotate 60 degrees to the left and 60 degrees to the right. The reason for this arrangement is that only the tendency that the metal wheel sheets 2-3 obstruct the fluid flow can be pushed by the fluid or gas, so that the metal wheel sheets 2-3 need to be prevented from clinging to the rotatable metal track when rotating 180 degrees, which leads to a great reduction in the fluid obstruction, and at this time, the power generation efficiency is greatly reduced.
The connector 3 is mainly used for connecting the surface acoustic wave detection device 1 with the power generation device 2, the connectors 3 are circular, the number of the connectors 3 is two, and the two connectors 3 are respectively located on two sides of a magnetic field formed by the first magnet 1-4 and the second magnet 2-1. The connector 3 forms a recessed cylinder with the lower side of the surface acoustic wave detection device 1 and the upper side of the power generation device 2 through which fluid flows. The connector 3 is internally provided with a metal conductive part which transmits current generated by cutting the magnetic induction lines by the metal wheel sheets 2-3 into the energy storage device 1-2, but because the connector is externally contacted with fluid and gas, a layer of non-metal and anti-corrosion material is wrapped outside the connector 3 to form a protective layer, so that the connector is prevented from being corroded.
In specific implementation, in order to increase the power generation efficiency, the device further comprises two drainage plates 4, and the two drainage plates 4 are respectively located at two ends of the surface acoustic wave detection device 1. The first end of the drainage plate 4 is attached to the bottom side of the surface acoustic wave detection device 1, and the second end of the drainage plate 4 is located outside the surface acoustic wave detection device 1 and is inclined upwards for increasing the inlet of fluid. The inlet and the outlet of the fluid formed by the drainage plate 4 and the power generation device 2, when the fluid enters the fluid channel between the surface acoustic wave detection device 1 and the power generation device 2, the fluid and the gas flow out at an accelerated speed because the cross-sectional area of the fluid channel area is smaller than that of the inlet, and therefore the drainage plate 4 can achieve the effect of accelerating the outflow of the fluid.
In specific implementation, the surface acoustic wave detection device further comprises a signal transmission device 1-5, and the controller 1-3 sends a detection result to an external signal receiving device through the signal transmission device 1-5 so as to facilitate checking by a worker. The signal transmission means 1-5 may be an antenna, for example.
The device pushes the metal wheel sheets 2-3 to rotate through the flow of fluid such as water flow, air flow and the like in the pipeline, so that the rotatable metal crawler 2-2 is pushed to rotate. A surface acoustic wave detection device 1 on the upper portion of the device and a power generation device 2 on the lower portion of the device are both provided with a magnet with strong magnetic force to form a magnetic field, a thrust metal wheel piece 2-3 generated by high-speed flow of water flow, air flow and the like rotates rapidly, magnetic induction lines are cut in the rotating process of the thrust metal wheel piece to form loop current, and the current is stored in an energy storage device 1-2 through a current collecting and storing device and is used by devices such as a controller 1-3, a signal transmission device 1-5 and a surface acoustic wave sensor 1-1 of the device, so that complete self-power supply is achieved.
For the precision of pipeline penetration and fracture condition judgment and position detection, the device adopts the surface acoustic wave sensor 1-1, the sensor is tightly attached to the shell part of the device, and the shell is tightly attached to the inner wall of the pipeline, so that the surface acoustic wave sensor 1-1 can be considered to be attached to the inner wall of the pipeline and can effectively receive sound wave information in the pipeline.
In practical application, the pipeline leakage detection device is arranged in the pipeline to be detected at intervals, and the pipeline leakage position can be accurately determined by combining the adjacent pipeline leakage detection devices.
The invention also provides a detection method of pipeline leakage, which adopts the detection device of pipeline leakage to detect, and specifically comprises the following steps:
acquiring an electric signal acquired by the surface acoustic wave sensor;
calculating the distance from the leakage position of the pipeline to be detected to the surface wave sensor according to the transmission speed of the sound velocity in the pipeline to be detected, the loss ratio of the sound velocity in the fluid and the electric signal;
and determining the leakage position of the pipeline to be detected by combining the distance between the leakage position of the pipeline to be detected and the surface wave sensor, which is measured by the detection device for the leakage of the adjacent pipeline.
The following further illustrates aspects of the invention in connection with a specific example.
The device of the present invention is attached to the pipe to be tested at the same distance, and fig. 3 is a schematic circuit connection diagram of the device for detecting pipe leakage in the embodiment of the present invention. During the water flow, sound waves with approximate sound wave frequencies are generated, and the device receives the sound waves and stores the sound waves in a controller inside the device. When the pipeline is penetrated or broken, different sound waves are generated on the inner wall of the pipeline, the sound waves are far away from the sound waves recorded in the internal controller of the device, the penetrating or breaking part of the pipeline is adhered to the left side and the right side, and the penetrating or breaking position can be accurately positioned by combining sound wave signals of two adjacent devices.
In the operation process of the device, the sound wave condition of the inner wall of the pipeline is detected in real time, the sound wave is related to the physical properties such as the speed, the quality and the density of fluid and gas passing through the pipeline, the information of the sound wave generated when different fluids and gases in the pipeline flow is different, through the property, when the pipeline leaks, namely the fluid and the gas leak out of the pipeline, strong noise information is generated at the leaking part, the information is transmitted to the surface acoustic wave sensor through the inner wall of the pipeline, the surface acoustic wave sensor converts the information into electric information and transmits the electric information to the controller, the controller immediately analyzes the electric information after receiving the electric signal, according to the difference of the transmission speed of the sound speed in the pipeline (different materials of the pipeline are different, but the materials are constant, the speed is constant), and the loss ratio of the sound wave in the fluid and the gas (the loss of the sound wave transmitted in a certain medium is constant), the time of the sound wave transmitted in the medium is calculated, and the time is multiplied by the speed, so that the distance between the leakage position and the device can be obtained. But it is not possible to determine whether a leak has occurred to the left or right side of the device. Because the device is set on both sides of the leakage position, the device closest to the leakage position can be obtained through the strength comparison of received sound waves, and an accurate distance can be obtained by the calculation of the two adjacent devices. Then, the information of the position where the pipeline is permeated or broken is directly uploaded to the outside through the wireless antenna, and related personnel are directly prompted to maintain as soon as possible. For example, the information is transmitted to an externally arranged signal receiver, and the information receiver of the information is directly connected to the internet, so that the information can be pushed to related personnel in real time.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are presented solely to aid in the understanding of the apparatus and its core concepts; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. A device for detecting a leak in a pipe, comprising: the acoustic surface wave detection device comprises an acoustic surface wave detection device, a power generation device and a connector; the surface acoustic wave detection device is connected with the power generation device through the connector, the upper side of the surface acoustic wave detection device is fixed on the inner wall of the upper side of the pipeline to be detected, and the power generation device is positioned below the surface acoustic wave detection device;
the surface acoustic wave detection device comprises a surface acoustic wave sensor, an energy accumulator, a controller and a first magnet; the surface acoustic wave sensor is positioned on the upper side of the surface acoustic wave detection device, is attached to the inner wall of the upper side of the pipeline to be detected, and is used for detecting surface acoustic wave signals of fluid in the pipeline; the signal input end of the controller is connected with the output end of the surface acoustic wave sensor and used for detecting the leakage state of the pipeline according to the received surface acoustic wave signal; the output end of the energy accumulator is connected with both the power supply end of the surface acoustic wave sensor and the power supply end of the controller and is used for supplying power to the surface acoustic wave sensor and the controller;
the power generation device comprises a second magnet, a shell, a rotatable metal crawler and a plurality of metal wheel sheets; the second magnet is positioned in the shell of the power generation device, and the first magnet and the second magnet are arranged oppositely and used for generating a magnetic field; the rotatable metal crawler belt is coated on the outer surface of a shell of the power generation device, the rotatable metal crawler belt can rotate in the vertical direction, and the rotatable metal crawler belt positioned above the shell is positioned between the first magnet and the second magnet; the plurality of metal wheel sheets are fixed on the rotatable metal track; the metal wheel sheet is fixed on the rotatable metal track through a rotating shaft, and the rotating shaft can rotate in the horizontal direction;
when fluid between the surface acoustic wave detection device and the power generation device flows, the metal wheel sheet is pushed to drive the rotatable metal crawler to rotate; and the current generated by the metal wheel sheet is transmitted to the energy accumulator through the connector and is converted and stored through the built-in power module.
2. The apparatus of claim 1, wherein the rotation angle of the rotation shaft is 120 degrees, and the rotation angle corresponding to the metal wheel piece is 120 degrees.
3. The device for detecting the pipeline leakage according to claim 1, further comprising two flow guide plates, wherein the two flow guide plates are respectively positioned at two ends of the surface acoustic wave detection device; the first end of the drainage plate is attached to the bottom side of the surface acoustic wave detection device, and the second end of the drainage plate is located outside the surface acoustic wave detection device and inclines upwards.
4. The apparatus according to claim 1, wherein the connectors are circular rings, the number of the connectors is two, and the two connectors are respectively located on two sides of a magnetic field formed by the first magnet and the second magnet.
5. The apparatus according to claim 1, wherein the connector is made of a conductive metal material on the inside and a non-metallic corrosion-resistant material on the outside.
6. The apparatus of claim 1, wherein said surface acoustic wave detection device further comprises a signal transmission device, and said controller transmits the detection result to an external signal receiving device through said signal transmission device.
7. A method for detecting a pipe leak, which is performed by using the apparatus for detecting a pipe leak according to any one of claims 1 to 6, the method comprising:
acquiring a sound wave signal acquired by a surface acoustic wave sensor and converting the sound wave signal into an electric signal;
calculating the distance from the leakage position of the pipeline to be detected to the surface wave sensor according to the transmission speed of the sound velocity in the pipeline to be detected, the loss ratio of the sound velocity in the fluid and the electric signal;
and determining the leakage position of the pipeline to be detected by combining the distance between the leakage position of the pipeline to be detected and the surface wave sensor, which is measured by the detection device for the leakage of the adjacent pipeline.
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