CN113284636A - Nuclear power pipeline and leakage monitoring system and method thereof - Google Patents
Nuclear power pipeline and leakage monitoring system and method thereof Download PDFInfo
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- CN113284636A CN113284636A CN202110529638.4A CN202110529638A CN113284636A CN 113284636 A CN113284636 A CN 113284636A CN 202110529638 A CN202110529638 A CN 202110529638A CN 113284636 A CN113284636 A CN 113284636A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a nuclear power pipeline and a leakage monitoring system and method thereof, belonging to the nuclear power technical field, comprising: the vibration sensing optical fiber vibration sensor comprises a hollow pipeline main body, wherein the whole outer wall of the pipeline main body is distributed with vibration sensing optical fibers which are distributed along the warp direction and the weft direction and form a net shape; one end of the vibration sensing optical fiber is connected with a photoelectric converter and used for converting a vibration signal of the vibration sensing optical fiber into an electric signal; the photoelectric converter is used for connecting the receiving and analyzing device of the electric signal. The invention can accurately detect the leakage position of the nuclear power pipeline.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a nuclear power pipeline and a leakage monitoring system and method of the nuclear power pipeline.
Background
The nuclear power high-energy pipeline is an indispensable device in the nuclear power industry, and effective leakage monitoring and fault diagnosis for the nuclear power high-energy pipeline is one of the important difficulties and hot spots of the current nuclear power industry. Due to the particularity of the working environment of the nuclear power high-energy pipeline, the traditional leakage monitoring method is difficult to realize accurate leakage positioning monitoring.
The temperature and humidity monitoring method is used for monitoring leakage of a general nuclear power pipeline, or is a temperature measuring optical fiber method, but the method is applied to the nuclear power pipeline, so that the method has many limitations, for example, the temperature and humidity method needs to damage a shell of the nuclear power pipeline so as to be convenient for installing a temperature and humidity sensor, is inconvenient, and can also cause safety threat to the nuclear power pipeline.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a nuclear power pipeline and a leakage monitoring system and method for the nuclear power pipeline, so as to solve the problem of inconvenient leakage monitoring of the nuclear power pipeline in the prior art.
The present invention solves the above technical problem, and in one aspect, the present invention provides a nuclear power pipeline, including:
the vibration sensor comprises a hollow pipeline main body, wherein vibration sensing optical fibers which are distributed along the warp direction and the weft direction and form a net shape are distributed on the whole outer wall of the pipeline main body; one end of the vibration sensing optical fiber is connected with a photoelectric converter and is used for converting a vibration signal of the vibration sensing optical fiber into an electric signal; the photoelectric converter is used for connecting the receiving and analyzing device of the electric signal.
Furthermore, the vibration sensing optical fiber is arranged in the warp direction and the weft direction from one end of the pipeline main body to form a net-shaped continuous vibration sensing optical fiber.
Furthermore, bulges are uniformly arranged at two ports of the pipeline main body and are used for distributing the vibration sensing optical fibers in the latitudinal direction at intervals and turning around the vibration sensing optical fibers.
Furthermore, the outer wall of the pipeline main body is uniformly provided with at least one row of bulges distributed along the extending direction of the pipeline, and the bulges are used for distributing the vibration sensing optical fibers at intervals distributed in the warp direction and turning the vibration sensing optical fibers in the warp direction.
Furthermore, the outer wall of the pipeline main body is wrapped with an insulating layer, so that the vibration sensing optical fiber is positioned between the pipeline main body and the insulating layer; a gap of 3-4CM is kept between the inner wall of the heat-insulating layer and the outer wall of the pipeline main body; the pipeline main body is made of austenitic stainless steel.
In another aspect, the present invention further provides a nuclear power pipeline leakage monitoring system, including:
the vibration sensor comprises a hollow pipeline main body, wherein vibration sensing optical fibers which are distributed along the warp direction and the weft direction and form a net shape are distributed on the whole outer wall of the pipeline main body; one end of the vibration sensing optical fiber is connected with a photoelectric converter and is used for converting a vibration signal of the vibration sensing optical fiber into an electric signal;
the data processor is connected with the photoelectric converter and used for receiving and analyzing the vibration signals collected by the photoelectric converter; and outputting the analysis result, and sending out an alarm signal when the analysis result comprises the abnormal vibration signal result.
Further still include:
and the display device is connected with the data processor and displays the data analysis result of the data processor.
Furthermore, a data transmission cable is arranged between the photoelectric converter and the data processor.
In another aspect, the present invention further provides a nuclear power pipeline leakage monitoring method, including:
the photoelectric converter acquires vibration signals from the connected vibration sensing optical fibers and converts the acquired vibration signals into electric signals, the vibration sensing optical fibers are distributed on the outer wall of the whole pipeline main body along the warp direction and the weft direction to form a net shape, and the photoelectric converter is arranged at one end of the vibration sensing optical fibers;
the data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter, analyzes the vibration signal according to a preset algorithm, and sends out an alarm signal when the analysis result contains the abnormal vibration signal result; the preset algorithm is as follows:
in the formula
xLine ofIndicating the number of rows of the leakage area;
ycolumn(s) ofThe column number of the leakage area is shown;
[. The ] shows that the result is rounded upwards;
x represents the length of all the weft vibrating optical fibers;
Tline ofRepresenting the period length of one circle of the vibration light in the weft direction;
Tcolumn(s) ofWhich represents the period length of one turn of the oscillating light going around.
Further, the step data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter and analyzes the vibration signal, and when the analysis result includes the abnormal vibration signal result, the step data processor sends out an alarm signal, and the step data processor is further set as follows:
the data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter and analyzes whether the vibration signal exceeds a set amplitude, and when the amplitude of the collected vibration signal exceeds a set threshold value, the data processor judges that the vibration signal is an abnormal vibration signal and sends an alarm signal.
According to the leakage monitoring system and method for the nuclear power pipeline and the nuclear power pipeline, disclosed by the invention, the leakage monitoring on the nuclear power high-energy pipeline is realized by applying the vibration sensing optical fiber technology, and compared with a temperature and humidity monitoring method, the method can be used for protecting the shell of the nuclear power high-energy pipeline to a greater extent. Compared with the conventional leakage monitoring method, the method has the advantages that the axial positioning of nuclear power leakage can be realized, the diameter of the nuclear power pipeline is larger, if the leakage amount is smaller, the problem of positioning error is caused by insufficient spatial resolution, and the radial positioning of the nuclear power pipeline is difficult to find.
Drawings
FIG. 1 is a schematic layout view of a vibration sensing optical fiber on a nuclear power pipeline according to at least one embodiment of the present disclosure;
FIG. 2 is an expanded view of the vibration sensing fiber layout of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of a nuclear power pipeline leakage monitoring system according to a second embodiment of the present disclosure;
FIG. 4 is a diagram illustrating vibration differential results provided by an embodiment of the present invention;
fig. 5 is a schematic view of a nuclear power pipeline leakage monitoring method provided by the third embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
A first embodiment of the present invention provides a nuclear power pipeline, including:
the vibration sensor comprises a hollow pipeline main body 1, wherein vibration sensing optical fibers 2 which are distributed along the warp direction and the weft direction and form a net shape are distributed on the whole outer wall of the pipeline main body;
the nuclear power pipeline is used as a main body of the nuclear power pipeline, the material, the pipe wall thickness and the strength of the nuclear power pipeline need to meet nuclear power requirements, and the inside of the pipeline main body is filled with circulating cooling water or steam. The outer wall of the pipeline main body is wrapped with the heat insulation layer, so that the vibration sensing optical fiber is positioned between the pipeline main body and the heat insulation layer; a gap of 3-4CM is kept between the inner wall of the heat-insulating layer and the outer wall of the pipeline main body; the pipeline main body is made of austenitic stainless steel.
The vibration sensing optical fiber is used as a distributed sensor, and can accurately measure information such as stress, temperature, vibration and the like at any point along the optical fiber. The vibration sensing optical fiber is used as a sensor and is installed on a nuclear power leakage pipeline, wherein the vibration optical fiber is installed on the nuclear power pipeline in a mode shown in the figure 1, the vibration optical fiber firstly advances for a distance a along the axial direction or the latitudinal direction of the pipeline, then winds the pipeline for a circle, then winds the pipeline for a distance a, winds the pipeline for another circle, and reciprocates in the same mode until the vibration optical fiber advances to the edge of the pipeline; and then, after turning a circle at the upper right corner of the edge according to a wiring development diagram, advancing from one side of the pipeline to the other side along the axial direction, advancing for a length a along the edge or radial arc of the pipeline, and then axially advancing to the other side, and repeating the steps until the whole outer surface of the pipeline is fully paved. And similarly, the blank at the starting point is just combined with the solid line at the end point, the optical fiber just surrounds the whole pipe surface, the surface of the pipeline is cut into a plurality of squares with fixed sizes, and the side length of each square is a. The vibration sensing optical fiber mesh structure formed on the outer wall of the pipeline is expanded to form the mesh diagram shown in fig. 2. For making the winding of vibration sensing optical fiber in warp-wise and latitudinal direction more convenient more accurate, two port departments of pipeline main part evenly are provided with the arch, and the distance between two archs is a for vibration sensing optical fiber distributes at the interval of latitudinal direction distribution and winds to the turn. The outer wall of the pipeline main body is evenly provided with at least one row of bulges distributed along the extending direction of the pipeline, and the distance between the two bulges is a and is used for distributing the vibration sensing optical fiber at the interval distributed in the warp direction and turning the vibration sensing optical fiber in the warp direction. Alternatively, the vibration sensing fiber may be formed into a fiber mesh by using other media, such as a film, and then the fiber mesh is sleeved on the outer wall of the pipe.
After the vibration sensing optical fiber 2 is wound on the pipeline body, the vibration sensing optical fiber can continue to extend to be used as a signal cable to transmit signals until the photoelectric converter is connected.
One end of the vibration sensing optical fiber 2 is connected with a photoelectric converter 5 and used for converting a vibration signal of the vibration sensing optical fiber into an electric signal; the photoelectric converter 5 is used for connecting the receiving and analyzing device of the electric signal.
The electric signal receiving and analyzing device can be a data processor, an upper computer and the like.
The vibration sensing optical fiber is arranged from one end of the pipeline main body in the warp direction and the weft direction to form a net shape, and the net shape is a continuous vibration sensing optical fiber. Optionally, one vibration sensing optical fiber is arranged in the warp direction, the other vibration sensing optical fiber is arranged in the weft direction, the vibration sensing optical fibers are wound in a staggered mode to form a mesh, and the tail end of each vibration sensing optical fiber is connected to the photoelectric converter 5.
Example two
A second embodiment of the present invention provides a nuclear power pipeline leakage monitoring system, including:
the vibration sensor comprises a hollow pipeline main body 1, wherein vibration sensing optical fibers 2 which are distributed along the warp direction and the weft direction and form a net shape are distributed on the whole outer wall of the pipeline main body; one end of the vibration sensing optical fiber 2 is connected with a photoelectric converter 5 and used for converting a vibration signal of the vibration sensing optical fiber into an electric signal;
the data processor 6 is connected with the photoelectric converter and used for receiving and analyzing the vibration signals collected by the photoelectric converter; and outputting the analysis result, and sending out an alarm signal when the analysis result comprises the abnormal vibration signal result.
The photoelectric converter can be directly connected to the data processor end, or can be in a relay position, and the signal of the photoelectric converter is further transmitted to the data processor end by other signal transmission cables or devices.
The method comprises the steps that a photoelectric converter is connected to one end of a vibration sensing optical fiber, wherein the photoelectric converter can convert an optical signal of the vibration sensing optical fiber into an electric signal, and the optical signal in the vibration sensing optical fiber represents the vibration signal, so that the vibration signal can be collected only by monitoring the electric signal converted by the photoelectric converter, the electric signal in the photoelectric converter can be collected by a signal collection card, the collected vibration signal is further subjected to signal processing in a data processor, a leakage threshold value of a nuclear power pipeline is set, and the nuclear power pipeline is monitored in real time.
And the display device 7 is connected with the data processor and displays the data analysis result of the data processor.
And the vibration signal can display the signal fluctuation condition shown in figure 4 through connecting a display with the data processor. If the difference result is abnormal at the point 3 shown in fig. 1, which is represented by the obvious jump phenomenon of the difference amplitude of fig. 4 compared with the adjacent position, the amplitude of the point can be directly positioned to be abnormal.
EXAMPLE III
A third embodiment of the present invention provides a nuclear power pipeline leakage monitoring method, as shown in fig. 5, including:
s1, a photoelectric converter acquires vibration signals from connected vibration sensing optical fibers and converts the acquired vibration signals into electric signals, the vibration sensing optical fibers are distributed on the outer wall of the whole pipeline main body along the warp direction and the weft direction to form a net shape, and the photoelectric converter is arranged at one end of the vibration sensing optical fibers;
and S2, the data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter, analyzes the vibration signal according to a preset algorithm, and sends out an alarm signal when the analysis result contains the abnormal vibration signal result.
Further, the step data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter and analyzes the vibration signal, and when the analysis result includes the abnormal vibration signal result, the step data processor sends out an alarm signal, and the step data processor is further set as follows:
the data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter and analyzes whether the vibration signal exceeds a set amplitude, and when the amplitude of the collected vibration signal exceeds a set threshold value, the data processor judges that the vibration signal is an abnormal vibration signal and sends an alarm signal;
the preset algorithm is as follows:
in the formula
xLine ofIndicating the number of rows of the leakage area;
ycolumn(s) ofThe column number of the leakage area is shown;
[. The ] shows that the result is rounded upwards;
x represents the length of all the weft vibrating optical fibers;
Tline ofRepresenting the period length of one circle of the vibration light in the weft direction;
Tcolumn(s) ofWhich represents the period length of one turn of the oscillating light going around.
Taking the nuclear power pipeline shown in fig. 1 as an example, a vibration signal abnormality occurs at point 3, the vibration signal abnormality includes a vibration signal of the pipeline when the nuclear power pipeline is broken or leaked, and the preset algorithm for calculating the broken or leaked point includes:
the radius r and the length c of the nuclear power pipeline are known quantities, the length of a vibration sensing optical fiber deployed on the nuclear power pipeline and radially wound for one circle is l-2 pi r, assuming that the side length of each small square is a, after the vibration sensing optical fiber is wound around the pipeline for one circle, the vibration sensing optical fiber is tightly connected with the pipeline for one circle, wherein the number of the small squares surrounding the pipeline for one circle is n-la. The development effect diagram is shown in the above figure, wherein the side length coordinates of the squares A-J are respectively (note: the leftmost side of the square is marked with x)1Are respectively marked as x in the clockwise direction2，x3，x4)
When the leakage occurs in the region E (i.e. point 3) shown in fig. 2, the vibration sensing fiber as a sensor collects the vibration information related to the leakage to the data processor via the photoelectric converter and the data acquisition card, and then performs real-time amplitude vibration differentiation on the collected vibration signal in the data processor (the amplitude vibration differentiation technology is to use the vibration collected in real timeThe dynamic signal is differentiated from the vibration signal acquired in the previous period), and the differentiated result is displayed by the length of the optical fiber on the abscissa and the amplitude of the vibration difference on the ordinate. It is apparent that since the vibration monitoring accuracy is in units of squares here, there are four sides where signal abnormalities can be detected as shown in fig. 4 above. Can be according to x in FIG. 41x2x3x4The value of (a) can be quickly located in the leakage area a-J, i.e. the leakage location can be located in a square area with a side length a. Finally, the leakage square is directly positioned in the interface of the upper computer or the data processor, if leakage occurs in the area E, the leakage information is in the fourth row and the fifth row, the leakage area can be quickly positioned according to the method, and the overhaul time of operation and maintenance personnel is greatly prolonged.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Those skilled in the art can implement the invention in various modifications, such as features from one embodiment can be used in another embodiment to yield yet a further embodiment, without departing from the scope and spirit of the invention. Any modification, equivalent replacement and improvement made within the technical idea of using the present invention should be within the scope of the right of the present invention.
Claims (10)
1. A nuclear power pipeline, comprising:
the vibration sensor comprises a hollow pipeline main body, wherein vibration sensing optical fibers which are distributed along the warp direction and the weft direction and form a net shape are distributed on the whole outer wall of the pipeline main body; circulating cooling water or steam is filled in the pipeline main body;
one end of the vibration sensing optical fiber is connected with a photoelectric converter and is used for converting a vibration signal of the vibration sensing optical fiber into an electric signal; the photoelectric converter is used for connecting the receiving and analyzing device of the electric signal.
2. The nuclear power pipeline of claim 1, characterized in that: the vibration sensing optical fiber is arranged from one end of the pipeline main body in the warp direction and the weft direction to form a net shape, and the net shape is a continuous vibration sensing optical fiber.
3. The nuclear power pipeline of claim 1, characterized in that: the two ports of the pipeline main body are uniformly provided with bulges for distributing the spacing and turning around the vibration sensing optical fibers in the weft direction.
4. The nuclear power pipeline of claim 1, characterized in that: the outer wall of the pipeline main body is uniformly provided with at least one row of bulges distributed along the extending direction of the pipeline, and the bulges are used for distributing the vibration sensing optical fibers at intervals distributed in the warp direction and turning the vibration sensing optical fibers in the winding direction.
5. The nuclear power pipeline of claim 1, characterized in that: the outer wall of the pipeline main body is wrapped with the heat insulation layer, so that the vibration sensing optical fiber is positioned between the pipeline main body and the heat insulation layer; a gap of 3-4CM is kept between the inner wall of the heat-insulating layer and the outer wall of the pipeline main body; the pipeline main body is made of austenitic stainless steel.
6. A nuclear power pipeline leak monitoring system comprising:
the vibration sensor comprises a hollow pipeline main body, wherein vibration sensing optical fibers which are distributed along the warp direction and the weft direction and form a net shape are distributed on the whole outer wall of the pipeline main body; one end of the vibration sensing optical fiber is connected with a photoelectric converter and is used for converting a vibration signal of the vibration sensing optical fiber into an electric signal;
the data processor is connected with the photoelectric converter and used for receiving and analyzing the vibration signals collected by the photoelectric converter; and outputting the analysis result, and sending out an alarm signal when the analysis result comprises the abnormal vibration signal result.
7. The nuclear power pipeline leakage monitoring system of claim 6, further comprising:
and the display device is connected with the data processor and displays the data analysis result of the data processor.
8. The nuclear power pipeline leakage monitoring system of claim 6, wherein a data transmission cable is further disposed between the photoelectric converter and the data processor.
9. A nuclear power pipeline leakage monitoring method is characterized by comprising the following steps:
the photoelectric converter acquires vibration signals from the connected vibration sensing optical fibers and converts the acquired vibration signals into electric signals, the vibration sensing optical fibers are distributed on the outer wall of the whole pipeline main body along the warp direction and the weft direction to form a net shape, and the photoelectric converter is arranged at one end of the vibration sensing optical fibers; the data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter, analyzes the vibration signal according to a preset algorithm, and sends out an alarm signal when the analysis result contains the abnormal vibration signal result; the preset algorithm is as follows:
in the formula
xLine ofIndicating the number of rows of the leakage area;
ycolumn(s) ofThe column number of the leakage area is shown;
[. The ] shows that the result is rounded upwards;
x represents the length of all the weft vibrating optical fibers;
Tline ofRepresenting the period length of one circle of the vibration light in the weft direction;
Tcolumn(s) ofWhich represents the period length of one turn of the oscillating light going around.
10. The nuclear power pipeline leakage monitoring method of claim 9, wherein the step data processor receives the vibration signal collected by the connected photoelectric converter from the connected photoelectric converter and analyzes the vibration signal, and when the analysis result includes a result of abnormality of the vibration signal, the step data processor further sets the step of:
the data processor receives the vibration signal collected by the photoelectric converter from the connected photoelectric converter and analyzes whether the vibration signal exceeds a set amplitude, and when the amplitude of the collected vibration signal exceeds a set threshold value, the data processor judges that the vibration signal is an abnormal vibration signal and sends an alarm signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803649A (en) * | 2021-08-30 | 2021-12-17 | 华能南京新港综合能源有限责任公司 | Long distance steam pipeline buried pipe leakage monitoring system |
| CN114509217A (en) * | 2022-01-24 | 2022-05-17 | 中国长江三峡集团有限公司 | Reservoir leakage detection device and detection method thereof |
| CN116182086A (en) * | 2023-04-28 | 2023-05-30 | 中特检管道工程（北京）有限公司 | Oil gas pipeline monitoring system adopting Internet of things technology |
-
2021
- 2021-05-14 CN CN202110529638.4A patent/CN113284636A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803649A (en) * | 2021-08-30 | 2021-12-17 | 华能南京新港综合能源有限责任公司 | Long distance steam pipeline buried pipe leakage monitoring system |
| CN114509217A (en) * | 2022-01-24 | 2022-05-17 | 中国长江三峡集团有限公司 | Reservoir leakage detection device and detection method thereof |
| CN114509217B (en) * | 2022-01-24 | 2023-10-20 | 中国长江三峡集团有限公司 | Reservoir leakage detection device and detection method thereof |
| CN116182086A (en) * | 2023-04-28 | 2023-05-30 | 中特检管道工程（北京）有限公司 | Oil gas pipeline monitoring system adopting Internet of things technology |
| CN116182086B (en) * | 2023-04-28 | 2023-06-23 | 中特检管道工程（北京）有限公司 | Oil gas pipeline monitoring system adopting Internet of things technology |
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