CN214222770U - Natural gas pipeline leakage monitoring system based on sensing optical fiber - Google Patents
Natural gas pipeline leakage monitoring system based on sensing optical fiber Download PDFInfo
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- CN214222770U CN214222770U CN202022365695.7U CN202022365695U CN214222770U CN 214222770 U CN214222770 U CN 214222770U CN 202022365695 U CN202022365695 U CN 202022365695U CN 214222770 U CN214222770 U CN 214222770U
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Abstract
The utility model provides a natural gas line leakage monitoring system based on sensing optical fiber, including natural gas line support, natural gas line, photoelectric detector protection mechanism, protective tube, leakage monitoring system, the utility model discloses natural gas line support's setting can clamp and fix natural gas line through natural gas line support, simple structure, simple to operate; the photoelectric detector protection mechanism is arranged, the upper clamping seat and the lower clamping seat are fixed on the natural gas pipeline through the connecting bolt, and the protective cover can protect the optical path adapter and the optical fiber sensor and prevent the influence on monitoring in rainy and snowy weather; the leakage monitoring system is arranged, a light source emits laser, beam splitting is realized through a transmission optical path and then the laser is transmitted to an optical fiber sensor arranged on the wall of the natural gas pipeline, the optical fiber sensor picks up leakage vibration signals and noise and then transmits the leakage vibration signals and the noise to a photoelectric detector through the transmission optical path, and a signal acquisition and processing module carries out time delay estimation on the leakage signals to realize positioning of leakage points.
Description
Technical Field
The utility model relates to a pipeline leakage monitoring technology field especially relates to a natural gas line leakage monitoring system based on sensing optical fiber.
Background
At present, the total length of pipelines built in the world reaches 250 kilometers, the pipelines exceed the total mileage of railways and become the main transportation mode of world energy, and oil transportation in oil production areas of developed countries and middle east is realized. Pipelines in China are rapidly developed in recent years, the total length of the pipelines exceeds 7 kilometers, a large pattern of energy pipe networks crossing east and west, longitudinally crossing north and south, covering the whole country and communicating overseas is formed initially, and pipeline transportation becomes a main mode for allocating and conveying strategic energy such as oil and gas.
In the existing mature technology, only a sound wave monitoring method is effective for monitoring the leakage of the natural gas pipeline, but in order to improve the real-time performance of leakage monitoring and the accuracy of leakage point positioning, the arrangement density of sensors must be increased on a pipeline, and corresponding power supply and communication equipment is added, so that the system cost and the installation and maintenance cost are high.
Chinese patent application No. 201110271993.2 provides an optical fiber sensing natural gas pipeline leakage monitoring system. The optical fiber sensor group comprises an optical path system and a circuit, wherein an optical fiber sensor is arranged on a pipeline body at a certain distance, a plurality of adjacent optical fiber sensors form an optical fiber sensor group, each optical fiber sensor group shares a transmitting optical fiber to be connected with a light source, and each optical fiber sensor group is connected with a photoelectric detector by using a return optical fiber; the output of the photoelectric detector is connected with a signal acquisition and processing module with leakage signal identification and event positioning functions, and the output of the signal acquisition and processing module is connected with a microcomputer through an external interface.
The existing optical fiber sensing natural gas pipeline leakage monitoring system monitors a buried natural gas pipeline, is small in external interference factor and stable in monitoring, but a gas pipeline is fixed on a wall body after entering a cell, and if an optical fiber sensor is fixed on the gas pipeline, the influence of rain and snow is large, the monitoring information is interfered, and the optical fiber sensor cannot be protected.
SUMMERY OF THE UTILITY MODEL
To foretell not enough, the utility model provides a natural gas line leakage monitoring system based on sensing optical fiber.
The utility model provides a technical scheme that its technical problem adopted is: a natural gas pipeline leakage monitoring system based on sensing optical fibers comprises a plurality of natural gas pipeline supports, a natural gas pipeline, a photoelectric detector protection mechanism, a protection pipe and a leakage monitoring system, wherein the natural gas pipeline supports are provided with natural gas pipelines; the photoelectric detector protection mechanisms are multiple and are detachably connected to a natural gas pipeline; the protective tube is arranged between the photoelectric detector protective mechanism and the photoelectric detector protective mechanism; the leakage monitoring system is detachably connected with the photoelectric detector protection mechanism.
The natural gas pipeline support comprises a fixing plate, a supporting plate, an inclined strut and a clamping groove, wherein the supporting plate is vertically welded on one side of the fixing plate; the bottom of the supporting plate is welded and fixed with the fixing plate through an inclined strut; the draw-in groove welding in backup pad upper end, the joint has natural gas line on this draw-in groove, can clamp and fix natural gas line through natural gas line support, simple structure, simple to operate.
Preferably, the photoelectric detector protection mechanism comprises an upper clamping seat, a lower clamping seat, a connecting bolt, a support rod, a shield and a C-shaped clamping frame, wherein the upper clamping seat and the lower clamping seat are connected through the connecting bolt; a support rod is welded at the top of the upper clamping seat; the shield is welded on the top of the support rod; the inner side of the support rod is welded with a C-shaped clamping frame; the C type card frame on the joint have a protective tube, will go up the cassette and fix on natural gas line with lower cassette through connecting bolt, the guard shield can protect light path adapter and optical fiber sensor, prevent to cause the influence to the monitoring under sleet weather.
As optimization, the leakage monitoring system comprises a monitoring system, an optical path adapter, a transmission optical path and an optical fiber sensor, wherein the monitoring system is connected with the optical path adapter through the transmission optical path; the optical path adapters are multiple, and the optical path adapters are connected in series with the optical path adapters through transmission optical paths; each optical path adapter is connected with an optical fiber sensor through a lead; the optical fiber sensor is arranged on a natural gas pipeline, a light source emits laser, beam splitting is realized through a transmission optical path and then the laser is transmitted to the optical fiber sensor arranged on the wall of the natural gas pipeline, the optical fiber sensor picks up leakage vibration signals and noise transmitted along the natural gas pipeline and then transmits the signals back to a photoelectric detector of the system through the transmission optical path again, the signal acquisition and processing module demodulates and identifies and analyzes the leakage signals, and time delay estimation is carried out on the leakage signals to realize positioning of leakage points.
Preferably, the transmission light path passes through the protective tube.
Preferably, the lower end of the upper clamping seat and the upper end of the lower clamping seat are both provided with arc-shaped grooves matched with the natural gas pipeline.
The utility model has the advantages that:
1. the natural gas pipeline bracket of the utility model can clamp and fix the natural gas pipeline through the natural gas pipeline bracket, and has simple structure and convenient installation;
2. the utility model discloses the setting of photoelectric detector protection mechanism fixes upper cassette and lower cassette on the natural gas line through connecting bolt, and the guard shield can protect light path adapter and optical fiber sensor, prevents to cause the influence to the monitoring under sleet weather;
3. the utility model discloses leakage monitoring system's setting, the light source sends laser, realizes transmitting the optical fiber sensor who installs on the natural gas pipeline wall after the beam splitting through transmission light path, optical fiber sensor picks up along the leakage vibration signal and the noise back of natural gas pipeline propagation, again through transmission light path transmission back to the photoelectric detector of system, carry out leakage signal demodulation and identification analysis by signal acquisition and processing module to carry out the location of time delay estimation realization to the leakage point to leakage signal.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a right side view of the present invention.
Fig. 3 is a schematic diagram of the structure of the natural gas pipeline bracket of the present invention.
Fig. 4 is a schematic structural diagram of the protection mechanism of the photodetector of the present invention.
Fig. 5 is a schematic structural diagram of the leakage monitoring system of the present invention.
In the figure:
1. the device comprises a natural gas pipeline support, 11, a fixing plate, 12, a supporting plate, 13, an inclined strut, 14, a clamping groove, 2, a natural gas pipeline, 3, a photoelectric detector protection mechanism, 31, an upper clamping seat, 32, a lower clamping seat, 33, a connecting bolt, 34, a supporting rod, 35, a protective cover, 36, a C-shaped clamping frame, 4, a protective pipe, 5, a leakage monitoring system, 51, a monitoring system, 52, an optical path adapter, 53, a transmission optical path, 54 and an optical fiber sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
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 the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The natural gas pipeline leakage monitoring system based on the sensing optical fiber as shown in the attached drawings 1 to 5 comprises a plurality of natural gas pipeline supports 1, a natural gas pipeline 2, a photoelectric detector protection mechanism 3, a protection pipe 4 and a leakage monitoring system 5, wherein the natural gas pipeline supports 1 are provided with the natural gas pipeline 2; a plurality of photoelectric detector protection mechanisms 3 are detachably connected to the natural gas pipeline 2; the protective tube 4 is arranged between the photoelectric detector protective mechanism 3 and the photoelectric detector protective mechanism 3; the leakage monitoring system 5 is detachably connected with the photoelectric detector protection mechanism 3.
In this embodiment, the natural gas pipeline bracket 1 includes a fixing plate 11, a supporting plate 12, an inclined strut 13 and a clamping groove 14, wherein the supporting plate 12 is vertically welded to one side of the fixing plate 11; the bottom of the supporting plate 12 is welded and fixed with the fixing plate 11 through an inclined strut 13; the clamping groove 14 is welded at the upper end of the supporting plate 12, the natural gas pipeline 2 is clamped on the clamping groove 14, the natural gas pipeline 2 can be clamped and fixed through the natural gas pipeline support 1, the structure is simple, and the installation is convenient.
In this embodiment, the protection mechanism 3 of the photodetector includes an upper card holder 31, a lower card holder 32, a connecting bolt 33, a support rod 34, a shield 35 and a C-shaped card holder 36, wherein the upper card holder 31 and the lower card holder 32 are connected by the connecting bolt 33; a support rod 34 is welded at the top of the upper clamping seat 31; the shield 35 is welded on the top of the support rod 34; the C-shaped clamping frame 36 is welded on the inner side of the support rod 34; the protective pipe 4 is clamped on the C-shaped clamping frame 36, the upper clamping seat 31 and the lower clamping seat 32 are fixed on the natural gas pipeline 2 through the connecting bolt 33, the protective cover 35 can protect the optical path adapter 52 and the optical fiber sensor 54, and the monitoring is prevented from being influenced in rainy and snowy weather.
In this embodiment, the leakage monitoring system 5 includes a monitoring system 51, an optical path adapter 52, a transmission optical path 53 and an optical fiber sensor 54, wherein the monitoring system 51 is connected to the optical path adapter 52 through the transmission optical path 53; a plurality of optical path adapters 52 are adopted, and the optical path adapters 52 are connected in series with the optical path adapters 52 through transmission optical paths 53; each of the optical path adapters 52 is connected with a fiber sensor 54 through a wire; the optical fiber sensor 54 is arranged on the natural gas pipeline 2, the light source emits laser, beam splitting is realized through the transmission optical path 53 and is transmitted to the optical fiber sensor 54 arranged on the wall of the natural gas pipeline 2, the optical fiber sensor 54 picks up leakage vibration signals and noise transmitted along the natural gas pipeline 2, the leakage vibration signals and the noise are transmitted back to a photoelectric detector of the system through the transmission optical path 53 again, the signal acquisition and processing module demodulates, identifies and analyzes the leakage signals, and time delay estimation is carried out on the leakage signals to realize positioning of leakage points.
In this embodiment, the transmission optical path 53 passes through the shielding tube 4.
In this embodiment, the lower end of the upper clamping seat 31 and the upper end of the lower clamping seat 32 are both provided with arc-shaped grooves matched with the natural gas pipeline 2.
The working principle is as follows: during the use, can clamp and fix natural gas line 2 through natural gas line support 1, moreover, the steam generator is simple in structure, high durability and convenient installation, fix last cassette 31 and lower cassette 32 on natural gas line 2 through connecting bolt 33, guard shield 35 can protect light path adapter 52 and optical fiber sensor 54, prevent to cause the influence to the monitoring under sleet weather, the light source sends laser, realize transmitting to optical fiber sensor 54 installed on the wall of natural gas line 2 after the beam splitting through transmission light path 53, optical fiber sensor 54 picks up the leakage vibration signal and the noise of following natural gas line 2 propagation after, transmit back to the photoelectric detector of system through transmission light path 53 again, carry out leakage signal demodulation and identification analysis by signal acquisition and processing module, and carry out the location of time delay estimation realization to the leakage signal to the leakage point.
The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a natural gas line leakage monitoring system based on sensing optical fiber which characterized in that: the device comprises a plurality of natural gas pipeline supports (1), natural gas pipelines (2), a photoelectric detector protection mechanism (3), a protection pipe (4) and a leakage monitoring system (5), wherein the natural gas pipeline supports (1) are provided with the natural gas pipelines (2); the photoelectric detector protection mechanisms (3) are multiple and are detachably connected to the natural gas pipeline (2); the protective tube (4) is arranged between the photoelectric detector protective mechanism (3) and the photoelectric detector protective mechanism (3); the leakage monitoring system (5) is detachably connected with the photoelectric detector protection mechanism (3).
2. The sensing fiber based natural gas pipeline leak monitoring system of claim 1, wherein: the natural gas pipeline support (1) comprises a fixing plate (11), a supporting plate (12), an inclined strut (13) and a clamping groove (14), wherein the supporting plate (12) is vertically welded on one side of the fixing plate (11); the bottom of the supporting plate (12) is welded and fixed with the fixing plate (11) through an inclined strut (13); the clamping groove (14) is welded at the upper end of the supporting plate (12), and the natural gas pipeline (2) is clamped on the clamping groove (14).
3. The sensing fiber based natural gas pipeline leak monitoring system of claim 2, wherein: the photoelectric detector protection mechanism (3) comprises an upper clamping seat (31), a lower clamping seat (32), a connecting bolt (33), a support rod (34), a shield (35) and a C-shaped clamping frame (36), wherein the upper clamping seat (31) is connected with the lower clamping seat (32) through the connecting bolt (33); a support rod (34) is welded at the top of the upper clamping seat (31); the shield (35) is welded on the top of the support rod (34); the inner side of the support rod (34) is welded with a C-shaped clamping frame (36); the C-shaped clamping frame (36) is clamped with a protective tube (4).
4. The natural gas pipeline leakage monitoring system based on sensing optical fiber of claim 3, wherein: the leakage monitoring system (5) comprises a monitoring system (51), an optical path adapter (52), a transmission optical path (53) and an optical fiber sensor (54), wherein the monitoring system (51) is connected with the optical path adapter (52) through the transmission optical path (53); the optical path adapters (52) are multiple, and the optical path adapters (52) are connected with the optical path adapters (52) in series through transmission optical paths (53); each optical path adapter (52) is connected with an optical fiber sensor (54) through a lead; the optical fiber sensor (54) is arranged on the natural gas pipeline (2).
5. The natural gas pipeline leakage monitoring system based on sensing optical fiber of claim 4, wherein: the transmission light path (53) passes through the protective tube (4).
6. The natural gas pipeline leakage monitoring system based on sensing optical fiber of claim 3, wherein: the lower end of the upper clamping seat (31) and the upper end of the lower clamping seat (32) are both provided with arc-shaped grooves matched with the natural gas pipeline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022365695.7U CN214222770U (en) | 2020-10-22 | 2020-10-22 | Natural gas pipeline leakage monitoring system based on sensing optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022365695.7U CN214222770U (en) | 2020-10-22 | 2020-10-22 | Natural gas pipeline leakage monitoring system based on sensing optical fiber |
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| CN214222770U true CN214222770U (en) | 2021-09-17 |
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| CN202022365695.7U Active CN214222770U (en) | 2020-10-22 | 2020-10-22 | Natural gas pipeline leakage monitoring system based on sensing optical fiber |
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