CN112129470A - Pipeline micro-leakage monitoring simulation experiment system of underground comprehensive pipe gallery - Google Patents
Pipeline micro-leakage monitoring simulation experiment system of underground comprehensive pipe gallery Download PDFInfo
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- CN112129470A CN112129470A CN201910546997.3A CN201910546997A CN112129470A CN 112129470 A CN112129470 A CN 112129470A CN 201910546997 A CN201910546997 A CN 201910546997A CN 112129470 A CN112129470 A CN 112129470A
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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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
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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
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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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
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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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2892—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for underground fuel dispensing systems
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- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a pipeline micro-leakage monitoring simulation experiment system of an underground comprehensive pipe gallery, wherein a mounting bracket assembly comprises a plurality of flowmeter brackets capable of performing two-dimensional direction adjustment in a horizontal plane, and a height-adjustable flowmeter is mounted on each flowmeter bracket; the pipeline micro-leakage experiment unit comprises a high-risk pipeline, a plurality of leakage points are arranged on the high-risk pipeline, a valve body for adjusting leakage flow is installed at each leakage point, and an outlet of each valve body is connected with an inlet of a corresponding flowmeter; a plurality of siphon traps are positioned above the corresponding leakage points and are used for collecting gas at the outlet of the flowmeter; the pipeline micro-leakage detection assembly comprises a linear array sensor and an acquisition processing system, wherein the linear array sensor is arranged in a corresponding siphon catcher to acquire gas parameters of collected gas. The invention can simulate various practical working conditions of natural gas, heat power and other pipelines which generate micro leakage at different leakage positions with different leakage amounts.
Description
Technical Field
The invention relates to the technical field of pipeline micro-leakage monitoring simulation, in particular to a pipeline micro-leakage monitoring simulation experiment system of an underground comprehensive pipe gallery.
Background
At present, the construction of the underground pipe gallery mainly focuses on the construction and the development in the early stage, the investment and the attention degree in the aspects of operation maintenance and safety prevention and control in the later stage are not enough, the key detection and monitoring technology and matched instrument equipment are lack, and an effective underground pipe gallery safety prevention and control system is difficult to establish. Moreover, research on pipeline leakage detection at home and abroad mainly focuses on large leakage detection or pipeline defect damage detection, but few mature methods or instruments for micro-leakage monitoring exist, and the micro-leakage detection for pipelines such as natural gas pipelines and heat distribution pipelines in underground pipe galleries is more rare.
The existing micro-leakage detection methods include an acoustic emission detection method, a distributed optical fiber detection method, a negative pressure wave detection method and the like, but the detection methods all need to perform pipeline detection regularly to determine whether a pipeline has defects or leaks, a large amount of time is needed for each detection, the underground pipe gallery cannot be continuously monitored, and if the leakage occurs in the middle of a periodical detection period, disastrous results are brought to the safe operation of the underground pipe gallery. Meanwhile, in the detection method, defects and leakage points are manually arranged at fixed positions of the pipeline during detection experiments, only fixed leakage mode detection can be performed, various leakage working conditions of the pipeline such as natural gas, heat and the like cannot be completely simulated, and the detection method is not beneficial to debugging, optimizing and detecting equipment and verifying the accuracy of monitoring and detecting of the equipment.
Therefore, for the demand that adapts to the city utility tunnel rapid development in our country and the requirement of piping lane safety prevention and control system construction, to the various little leakage circumstances of city utility tunnel natural gas and heating power pipeline, need urgently to develop the little leakage monitoring simulation experiment system of underground utility tunnel natural gas and the pipeline such as heating power based on high-risk pipeline little leakage detecting system.
Disclosure of Invention
Aiming at the defects existing in the problems, the invention provides a pipeline micro-leakage monitoring simulation experiment system of an underground comprehensive pipe gallery, which can simulate various actual working conditions that pipelines such as a natural gas pipeline, a heat distribution pipeline and the like generate micro-leakage at different leakage positions with different leakage amounts, can adjust the lifting height of a sensor, perform a plurality of groups of leakage simulation experiments and assist in debugging a high-risk pipeline micro-leakage detection assembly.
The invention discloses a pipeline micro-leakage monitoring simulation experiment system of an underground comprehensive pipe gallery, which comprises:
the flowmeter comprises a mounting bracket assembly, a plurality of flow meter brackets and a height-adjustable flow meter, wherein the mounting bracket assembly comprises a plurality of flow meter brackets which can be adjusted in a two-dimensional direction in a horizontal plane;
the pipeline micro-leakage experiment unit comprises a high-risk pipeline, a plurality of leakage points are arranged on the high-risk pipeline, a valve body used for adjusting leakage flow is installed at each leakage point, and an outlet of each valve body is connected with an inlet of the corresponding flowmeter;
a plurality of siphon traps located above the corresponding leak points for collecting gas at the outlet of the flow meter;
the pipeline micro-leakage detection assembly comprises a linear array sensor and an acquisition processing system, wherein the linear array sensor is arranged in the corresponding siphon catcher and is used for acquiring gas parameters of the collected gas; and the acquisition processing system is used for acquiring the gas parameters and carrying out subsequent processing.
As a further improvement of the invention, the mounting bracket assembly also comprises a mounting bracket, a square wire casing and a height adjuster;
the pipeline micro-leakage experiment unit is arranged on the mounting bracket;
the siphon catcher is arranged below the square wire groove, and the square wire groove is arranged at the top of the mounting bracket;
the flowmeter is installed on the height adjuster, and the height adjuster can be installed on the flowmeter bracket in a lifting manner.
As a further improvement of the invention, the siphon trap comprises a trap body;
the upper end of the collector body is provided with an upper cover, and the upper cover form an accommodating cavity of the linear array sensor;
the lower end of the collector body is connected with a gas catcher through a connector, and the gas catcher is of a cone structure with a small upper opening and a large lower opening and is used for collecting gas at the outlet of the flowmeter.
As a further improvement of the invention, the pipeline micro-leakage experiment unit is a heat pipeline micro-leakage experiment unit and/or a natural gas pipeline micro-leakage experiment unit.
As a further improvement of the invention, the thermal pipeline micro-leakage experiment unit comprises a thermal pipeline, the thermal pipeline comprises an upper layer pipeline and a lower layer pipeline which are horizontally arranged, and the upper layer pipeline and the lower layer pipeline are communicated through a connecting pipe;
a plurality of internal thread tee joints are arranged on the upper layer pipeline and serve as leakage points; a throttling valve is installed at a leakage opening of the internal thread tee joint, and an outlet of the throttling valve is connected with an inlet of the corresponding flowmeter;
the end part of the lower layer pipeline is provided with a temperature control heating rod for heating water and forming steam.
As a further improvement of the invention, the upper layer pipeline is also provided with a water injection port, and the end part of the upper layer pipeline is provided with a pressure release valve.
As a further improvement of the invention, the natural gas pipeline micro-leakage experiment unit comprises a natural gas pipeline;
a plurality of internal thread tee joints are arranged on the natural gas pipeline and serve as leakage points; and a throttling valve is arranged at the leakage port of the internal thread tee joint, and the outlet of the throttling valve is connected with the inlet of the corresponding flowmeter.
As a further improvement of the invention, the natural gas pipeline is also provided with a natural gas inlet.
As a further improvement of the present invention, the linear array sensor includes a temperature sensor, a humidity sensor and a concentration sensor;
the temperature sensor is used for detecting the temperature of the water vapor;
the humidity sensor is used for detecting the humidity of the water vapor;
the concentration sensor is used for detecting the concentration of the natural gas.
As a further improvement of the invention, the acquisition processing system comprises a data acquisition device, an optical fiber sending module, an optical fiber receiving module, a network communication terminal and an information management system;
all the linear array sensors are connected with the data collector through data acquisition lines, the data collector is connected with the optical fiber sending module, the optical fiber sending module is connected with the optical fiber receiving module, the optical fiber receiving module is connected with the network communication terminal, and the network communication terminal is connected with the information management system.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the position of the leakage point is adjusted through the three-dimensional position of the flowmeter, and the leakage amount of the leakage point is adjusted through the valve body, so that the leakage working conditions of different positions of the high-risk pipeline are simulated, the operation is simple, and the debugging is convenient; the monitoring accuracy of the micro-leakage detection of the high-risk pipeline under various working conditions can be verified, and the system can be well debugged and optimized in an auxiliary mode, so that the optimal installation height of the high-precision linear array sensor and an internal processing algorithm of the acquisition system can be rapidly designed.
Drawings
Fig. 1 is a schematic structural diagram of a pipeline micro-leakage monitoring simulation experiment system of an underground comprehensive pipe gallery according to an embodiment of the invention;
FIG. 2 is a schematic structural view of the mounting bracket assembly of FIG. 1;
FIG. 3 is a schematic diagram of the siphon trap of FIG. 1;
FIG. 4 is a schematic structural diagram of a micro-leakage experimental unit of the heat distribution pipeline in FIG. 1;
FIG. 5 is a cross-sectional view of the micro-leakage testing unit of the thermal pipeline in FIG. 4;
FIG. 6 is a schematic structural diagram of a micro-leakage experimental unit of the natural gas pipeline in FIG. 1;
fig. 7 is a schematic structural diagram of the pipe micro-leakage detecting assembly in fig. 1.
In the figure:
10. mounting a bracket assembly; 11. a square wire groove; 12. mounting a bracket; 13. a height adjuster; 14. a flow meter; 15. a flow meter support;
20. a siphon catcher; 21. a trap body; 22. an upper cover; 23. a connector; 24. a gas trap;
30. a heat distribution pipeline micro-leakage experiment unit; 31. a thermal conduit; 32. an internal thread tee joint; 33. a throttle valve; 34. a water injection port; 35. a pressure relief valve; 36. a temperature control heating rod; 37. connecting a tee joint;
40. a natural gas pipeline micro-leakage experiment unit; 41. a natural gas pipeline; 42. an internal thread tee joint; 43. a throttle valve; 44. a natural gas inlet;
50. a pipeline micro-leakage detection assembly; 51. a linear array sensor; 52. a data acquisition line; 53. a data acquisition unit; 54. an optical fiber transmission module; 55. an optical fiber receiving module; 56. a network communication terminal; 57. an information management system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the 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", etc., 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 particular orientation, be constructed and operated in a particular 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 also 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 in specific cases to those skilled in the art.
The invention provides a pipeline micro-leakage monitoring simulation experiment system of an underground comprehensive pipe gallery, which comprises: the mounting bracket assembly comprises a plurality of flowmeter brackets capable of performing two-dimensional direction adjustment in a horizontal plane, and a height-adjustable flowmeter is mounted on each flowmeter bracket; the pipeline micro-leakage experiment unit comprises a high-risk pipeline, a plurality of leakage points are arranged on the high-risk pipeline, a valve body for adjusting leakage flow is installed at each leakage point, and an outlet of each valve body is connected with an inlet of a corresponding flowmeter; the siphon traps are positioned above the corresponding leakage points and are used for collecting gas at the outlet of the flowmeter; the pipeline micro-leakage detection assembly comprises a linear array sensor and an acquisition processing system, wherein the linear array sensor is arranged in the corresponding siphon catcher and is used for acquiring gas parameters of the collected gas; and the acquisition processing system is used for acquiring gas parameters and performing subsequent processing.
According to the invention, the position of the leakage point is adjusted through the three-dimensional position of the flowmeter, and the leakage amount of the leakage point is adjusted through the valve body, so that the leakage working conditions of different positions of the high-risk pipeline are simulated, and a plurality of groups of leakage simulation experiments can be carried out, so that the operation is simple, and the debugging is convenient; the monitoring accuracy of the micro-leakage detection of the high-risk pipeline under various working conditions can be verified, and the system can be well debugged and optimized in an auxiliary mode, so that the optimal installation height of the high-precision linear array sensor and an internal processing algorithm of the acquisition system can be rapidly designed.
The present invention will be described in further detail with reference to the accompanying drawings, wherein the pipeline micro-leakage experiment unit is exemplified by a thermal pipeline micro-leakage experiment unit and a natural gas pipeline micro-leakage experiment unit, and other high-risk pipelines can be used in the actual experiment process:
as shown in fig. 1, the present invention provides a pipe micro-leakage monitoring simulation experiment system for an underground comprehensive pipe gallery, comprising: the system comprises a mounting bracket assembly 10, a siphon catcher 20, a heating power pipeline micro-leakage experiment unit 30, a natural gas pipeline micro-leakage experiment unit 40 and a pipeline micro-leakage detection assembly 50; wherein:
as shown in fig. 1 and 2, the mounting bracket assembly 10 of the present invention includes a square wire chase 11, a mounting bracket 12, a height adjuster 13, a flow meter 14, and a flow meter bracket 15, and the mounting bracket assembly 10 is used for mounting a siphon catcher 20, a thermal pipe micro-leakage experiment unit 30, a natural gas pipe micro-leakage experiment unit 40, and a pipe micro-leakage detection assembly 50. The mounting bracket 12 is constructed by connecting aluminum profiles with different lengths through aluminum profile corner fittings and is divided into an upper layer bracket and a lower layer bracket; the mounting bracket is built by adopting an aluminum profile, and the mounting is simple and convenient; the two square wire grooves 11 are fixed on the upper layer bracket at equal intervals through bolts, the heating power pipeline micro-leakage experiment unit 30 and the natural gas pipeline micro-leakage experiment unit 40 are fixed on the lower layer bracket at equal intervals through strapping tapes, and the siphon traps 20 are fixed below the square wire grooves 11 through bolts and are distributed in a linear array; the inlet of the flowmeter 14 is connected with the leakage ports of the PPR internal thread tee joints of the thermal pipeline micro-leakage experiment unit 30 and the natural gas pipeline micro-leakage experiment unit 40 through PU pipes, so that the leakage amount is measured and controlled; the flowmeter 14 is connected with the height regulator 13 through screws, the height regulator 13 is fixed with the flowmeter support 15 through screws, the height of the flowmeter 14 can be regulated, so that the lifting height of the linear array sensor 51 and a leakage source (outlet of the flowmeter) is regulated, the flowmeter support 15 is placed below the siphon catcher 20 and can be moved in two-dimensional directions in a horizontal plane, and the leakage condition of different positions of a pipeline is simulated by moving the flowmeter support and matching the height regulator to regulate the height of the flowmeter 14.
As shown in fig. 1 and 3, the siphon trap 20 of the present invention includes a trap body 21, an upper cover 22, a connector 23, and a gas trap 24, and the siphon trap 20 is used to place a high-precision linear array sensor 51 and collect trace amount of water vapor and natural gas leaking from a thermal pipe 31 and a natural gas pipe 41 into a siphon trap chamber where the high-precision linear array sensor 51 is placed, thereby improving detection precision. The trap body 21 and the upper cover 22 are connected through threads, and the trap body 21 and the upper cover 22 form a cavity for placing the high-precision linear array sensor 51; the connector 23 is placed in the cavity of the catcher body 21, the upper end of the connector 23 is placed at the bottom of the catcher body 21, the connector 23 can slide up and down and rotate in the catcher body 21, the end of the connector 23 is connected with the gas catcher 24 through threads, and the gas catcher 24 is in a cone structure with a small upper opening and a large lower opening and is used for collecting gas at the outlet of the flowmeter 14; collecting the concentration of natural gas and the temperature and humidity of water vapor gathered in a cavity of the siphon catcher by a linear array sensor; the linear array sensor comprises a temperature sensor, a humidity sensor and a concentration sensor.
As shown in fig. 1, 4 and 5, the thermal pipeline micro-leakage experiment unit 30 of the present invention includes a thermal pipeline 31, an internal thread tee 32, a throttle valve 33, a water injection port 34, a pressure release valve 35, a temperature control heating rod 36 and a connecting tee 37, and the thermal pipeline micro-leakage experiment unit 30 is used for generating micro-leakage conditions with different precision and different positions to simulate various micro-leakage conditions of the thermal pipeline of the urban underground comprehensive pipe gallery in practice. The thermal pipeline 31 comprises an upper layer pipeline and a lower layer pipeline which are horizontally arranged, and the upper layer pipeline and the lower layer pipeline are communicated through a connecting pipe; a plurality of internal thread tee joints 32 are arranged on the upper layer pipeline, and the internal thread tee joints 32 are used as leakage points; a throttle valve 33 is arranged at a leakage port of the internal thread tee 32, an outlet of the throttle valve 33 is connected with an inlet of the corresponding flowmeter 14, and a water injection port 34 and a pressure release valve 35 are arranged on the upper layer pipeline; the end of the lower layer of tubing is provided with a temperature controlled heating rod 36 for heating the water and forming steam. Specifically, the method comprises the following steps: the PPR outer tooth plug in the upper layer pipeline is in threaded connection with a pressure release valve 35, the pressure release valve 35 is in threaded connection with a small-diameter inner thread of a PPR reducing straight joint, the large diameter of the PPR reducing straight joint is in welded connection with a PPR elbow, the PPR elbow is in welded connection with a PPR straight pipe, the PPR straight pipe is in welded connection with a horizontal through hole of an upper PPR connecting tee 37, a vertical through hole of the upper PPR connecting tee 37 is in welded connection with a lower PPR straight pipe and is in welded connection with a vertical through hole of a PPR tee of a lower pipeline and used for communicating the upper pipeline and the lower pipeline; the horizontal opening and the PPR straight tube butt fusion of tee bend 37 are connected to upper PPR, the horizontal opening butt fusion of silk tee bend 32 is in the same place in PPR straight tube and the PPR, the perpendicular opening of silk tee bend 32 passes through threaded connection with choke valve 33 in the PPR, simulate the leak point, choke valve 33 passes through PU pipe and is connected with port (import) under the flowmeter 14, the horizontal opening and the PPR straight tube butt fusion of silk tee bend 32 are in the same place in the PPR, other two leak points adopt this kind of mode to build up equally. Water filling port 34 with control the butt fusion of PPR straight tube together, the outer tooth end cap of water filling port 34 and PPR simultaneously passes through threaded connection together for to water injection in the pipeline and observe the water level in the pipeline, the top pipeline is in the same place through two PPR elbows and PPR straight tube and lower pipeline butt fusion. In a lower layer pipeline, a PPR elbow at the left end of the pipeline is welded with a PPR straight pipe, the PPR straight pipe is welded with a horizontal through hole of a PPR tee joint, a horizontal through hole at the other end of the PPR tee joint is welded with the PPR straight pipe, the PPR straight pipe is welded with a PPR pipe cap, a mounting hole is formed in the center of the PPR pipe cap, a temperature control heating rod 36 is welded with the pipe cap through AB glue, the lower pipeline is filled with water for heating to generate steam, the upper pipeline is filled with the steam, and the leakage position and the leakage amount are controlled by adjusting a throttle valve of a leakage point so as to simulate various micro-leakage working conditions of a heating power pipeline; meanwhile, the main body of the heat distribution pipeline micro-leakage experiment unit is lapped by adopting a PPR hot melting pipe, the length of the pipeline can be randomly built, and the micro-leakage experiment of pipelines with different lengths is facilitated.
As shown in fig. 1 and 6, the natural gas pipeline micro-leakage experiment unit 40 of the present invention includes a natural gas pipeline 41, an internal thread tee 42, a throttle valve 43 and a natural gas inlet 44, and the natural gas pipeline micro-leakage experiment unit 40 is used for generating micro-leakage conditions with different accuracies and different positions to simulate various micro-leakage conditions of the natural gas pipeline of the urban underground comprehensive pipe gallery in practice. Wherein, the natural gas pipeline 41 is provided with a plurality of internal thread tees 42 and a natural gas inlet 44, and the internal thread tees 42 are used as leakage points; a throttle valve 43 is arranged at the leakage port of the internal thread tee joint 42, and the outlet of the throttle valve 43 is connected with the inlet of the corresponding flowmeter 14. Specifically, a PPR pipe cap of the natural gas pipe 41 is welded to a PPR straight pipe, the PPR straight pipe is welded to a horizontal port of a PPR internal thread tee 42, and a vertical port of the PPR internal thread tee 42 is connected to a throttle valve 43 through threads, so as to simulate a leakage point; the throttle valve 43 is connected with the lower port of the flowmeter 14 through a PU pipe, the horizontal port of the PPR internal thread tee joint 42 is welded with the PPR straight pipe, and other two leakage points are built in the same way; the natural gas inlet 44 is welded with the PPR straight pipes on the two sides, the PPR straight pipes are welded with the PPR pipe caps, natural gas is injected into the simulation pipeline through the natural gas inlet, and the leakage position and the leakage amount are controlled by adjusting the throttling of a leakage point, so that various micro-leakage working conditions of the natural gas pipeline are simulated; meanwhile, the natural gas pipeline micro-leakage experiment unit main body is in lap joint by adopting the PPR hot melting pipe, the pipeline length can be randomly set up, and the micro-leakage experiment of pipelines with different lengths is convenient to carry out.
As shown in fig. 1 and 7, the pipeline micro-leakage detecting assembly 50 of the present invention includes a linear array sensor 51, a data collecting line 52, a data collector 53, an optical fiber sending module 54, an optical fiber receiving module 55, a network communication terminal 56 and an information management system 57, where the pipeline micro-leakage detecting assembly 50 is used to collect the temperature, humidity and natural gas concentration at the leakage positions of a thermal pipeline micro-leakage experiment unit and a natural gas pipeline micro-leakage experiment unit, and process and analyze the collected data; the linear array sensor 51 is arranged in the corresponding siphon catcher 20, the linear array sensor 51 is connected with a data collector 53 through a data collecting line 52, the data collector 53 is connected with an optical fiber sending module 54, the optical fiber sending module 54 is connected with an optical fiber receiving module 55, the optical fiber receiving module 55 is connected with a network communication terminal 56, and the network communication terminal 56 is connected with an information management system 57. Specifically, the pipeline micro-leakage detection assembly 50 is divided into three-stage acquisition structures, wherein the first-stage acquisition structure is a high-precision linear array sensor 51, the second-stage acquisition structure is a high-speed data acquisition device 53, and the third-stage acquisition structure is a network communication terminal 56, so that the pipeline detection data of dozens of kilometers can be acquired in a simulated manner; the 6 data acquisition lines 52 are placed in the two square wire grooves 11, three data acquisition lines 52 which are power lines, ground lines and signal lines are placed in each square wire groove 11, the high-precision linear array sensor 51 placed in each siphon catcher 20 is hung on the three data acquisition lines 52, the three data acquisition lines 52 can be hung on one thousand of the high-precision linear array sensors 51, the starting end of the 6 data acquisition lines 52 is connected with the high-speed data collector 53, the high-speed data collector 53 processes and uploads the data acquired by the high-precision linear array sensor 51, the high-speed data collector 53 is connected with the optical fiber sending module 54, the network communication terminal 56 is connected with the optical fiber receiving module 55, the optical fiber sending module 54 is connected with the optical fiber receiving module 55 through optical fibers, the high-speed data collector 53 transmits the processed data to the network communication terminal 56, the network communication terminal 56 can be connected with ten high-speed data collectors 53, and can collect and upload data collected by tens of thousands of high-precision linear array sensors 51, and the network communication terminal 56 is connected with the information management system 57, and uploads the collected data to the information management system 57 for data processing and storage.
The invention provides a simulation experiment method of a pipeline micro-leakage monitoring simulation experiment system based on an underground comprehensive pipe gallery, which comprises the following steps: a heating power pipeline micro-leakage simulation experiment method and a natural gas pipeline micro-leakage simulation experiment method; wherein:
the micro-leakage simulation experiment method for the heat distribution pipeline comprises the following steps:
s11, injecting water into the thermal pipeline micro-leakage experiment unit through the water injection port 34, observing the water level, stopping injecting water when the water level reaches about one third of the upper pipeline, setting the heating upper limit temperature and the heating lower limit temperature of the temperature control heating rod 36, and starting the power supply of the temperature control heating rod 36 to start heating;
s12, switching on the power supply, turning on the switch of the high-speed data collector 53 and the network communication terminal switch 56, and starting to collect data;
s13, adjusting the height of a height adjuster 13 connected with a flowmeter 14, selecting the placement position of a flowmeter bracket 15, selecting a leakage point, adjusting a leakage point throttle valve 33, and controlling the leakage amount by observing the flowmeter 14, thereby simulating the experiment that the high-precision linear array sensor 51 generates micro leakage at different lifting heights and different positions of a pipeline with different leakage amounts;
and S14, after the experiment is finished, turning off the power supply of the temperature control heating rod 36, turning off the switch of the high-speed data collector 53, the switch of the network communication terminal 56 and the switch of the PC, turning off the power supply, and finally analyzing the experimental data.
The natural gas pipeline micro-leakage simulation experiment method comprises the following steps:
s21, connecting the natural gas tank with the natural gas inlet 44, and opening a valve to introduce natural gas into the simulation pipeline;
s22, switching on the power supply, turning on the switch of the high-speed data collector 53 and the switch of the network communication terminal 56, and starting to collect data;
s23, adjusting the height of a height adjuster 13 connected with a flowmeter 14, selecting the placement position of a flowmeter bracket 15, selecting a leakage point, adjusting a leakage point throttle valve 43, and controlling the leakage amount by observing the flowmeter 14, thereby simulating the experiment that the high-precision linear array sensor 51 generates micro leakage at different lifting heights and different positions of a pipeline with different leakage amounts;
and S24, after the experiment is finished, closing a valve of the natural gas tank, closing a switch of the high-speed data acquisition device 53 and a switch of the network communication terminal 56, disconnecting a power supply, returning the natural gas tank to the original position, and finally analyzing the experimental data.
The natural gas simulation device is injected with a proper amount of water through the heating pipeline simulation device, the water in the pipeline is heated through the temperature control heating rod to simulate the heating pipeline of the underground comprehensive pipe gallery, and natural gas is introduced into the natural gas pipeline simulation device through the natural gas tank to simulate the natural gas pipeline of the underground comprehensive pipe gallery; the flowmeter is arranged on the flowmeter bracket and is connected with a throttle valve at a leakage point through a PU pipe, the lifting height of the high-precision linear array sensor and the pipeline leakage point is adjusted by adjusting the mounting height of the flowmeter, the pipeline leakage point is adjusted by selecting the position of the on-off throttle valve and the position of the movable flowmeter, and different leakage amounts are simulated by adjusting the opening degree of the throttle valve; the method comprises the following steps that a three-level acquisition structure of a high-risk pipeline micro-leakage detection system is used for acquiring the steam temperature, humidity and natural gas concentration leaked by a heating power pipeline micro-leakage experiment unit and a natural gas pipeline micro-leakage experiment unit, a second-level acquisition structure high-speed data acquisition unit can be simultaneously connected with 1000 high-precision linear array sensors in a hanging mode, a third-level acquisition structure network communication terminal can be simultaneously connected with 10 high-speed data acquisition units in a hanging mode, and each half meter of the third-level acquisition structure network communication terminal is provided with; the whole set of underground comprehensive pipe gallery high-risk pipeline micro-leakage detection system can monitor the micro-leakage condition of a natural gas pipeline and a heat distribution pipeline of 5 kilometers. The experimental system can independently perform the micro-leakage monitoring experiment of the heat distribution pipeline or the natural gas pipeline, and also can perform the micro-leakage monitoring experiment of the heat distribution pipeline and the natural gas pipeline simultaneously. The high-risk pipeline micro-leakage detection system can also independently acquire micro-leakage data of a heating power pipeline or a natural gas pipeline and can also acquire the data at the same time.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a little leakage monitoring simulation experiment system of pipeline of utility tunnel which characterized in that includes:
the flowmeter comprises a mounting bracket assembly, a plurality of flow meter brackets and a height-adjustable flow meter, wherein the mounting bracket assembly comprises a plurality of flow meter brackets which can be adjusted in a two-dimensional direction in a horizontal plane;
the pipeline micro-leakage experiment unit comprises a high-risk pipeline, a plurality of leakage points are arranged on the high-risk pipeline, a valve body used for adjusting leakage flow is installed at each leakage point, and an outlet of each valve body is connected with an inlet of the corresponding flowmeter;
a plurality of siphon traps located above the corresponding leak points for collecting gas at the outlet of the flow meter;
the pipeline micro-leakage detection assembly comprises a linear array sensor and an acquisition processing system, wherein the linear array sensor is arranged in the corresponding siphon catcher and is used for acquiring gas parameters of the collected gas; and the acquisition processing system is used for acquiring the gas parameters and carrying out subsequent processing.
2. The pipeline microleakage monitoring simulation experiment system of claim 1, wherein the mounting bracket assembly further comprises a mounting bracket, a square wire chase and a height adjuster;
the pipeline micro-leakage experiment unit is arranged on the mounting bracket;
the siphon catcher is arranged below the square wire groove, and the square wire groove is arranged at the top of the mounting bracket;
the flowmeter is installed on the height adjuster, and the height adjuster can be installed on the flowmeter bracket in a lifting manner.
3. The pipeline microleakage monitoring simulation experiment system of claim 1 or 2, wherein the siphon trap comprises a trap body;
the upper end of the collector body is provided with an upper cover, and the upper cover form an accommodating cavity of the linear array sensor;
the lower end of the catcher body is connected with a gas catcher through a connector, and the gas catcher is of a cone structure with a small upper opening and a large lower opening.
4. The pipeline micro-leakage monitoring simulation experiment system according to claim 1 or 2, wherein the pipeline micro-leakage experiment unit is a thermal pipeline micro-leakage experiment unit and/or a natural gas pipeline micro-leakage experiment unit.
5. The pipeline micro-leakage monitoring and simulation experiment system as claimed in claim 4, wherein the thermal pipeline micro-leakage experiment unit comprises a thermal pipeline, the thermal pipeline comprises an upper pipeline and a lower pipeline which are horizontally arranged, and the upper pipeline and the lower pipeline are communicated through a connecting pipe;
a plurality of internal thread tee joints are arranged on the upper layer pipeline and serve as leakage points; a throttling valve is installed at a leakage opening of the internal thread tee joint, and an outlet of the throttling valve is connected with an inlet of the corresponding flowmeter;
the end part of the lower layer pipeline is provided with a temperature control heating rod for heating water and forming steam.
6. The pipeline micro-leakage monitoring simulation experiment system of claim 5, wherein a water injection port is further arranged on the upper layer pipeline, and a pressure release valve is arranged at the end part of the upper layer pipeline.
7. The pipeline microleakage monitoring simulation experiment system of claim 4, wherein the natural gas pipeline microleakage experiment unit comprises a natural gas pipeline;
a plurality of internal thread tee joints are arranged on the natural gas pipeline and serve as leakage points; and a throttling valve is arranged at the leakage port of the internal thread tee joint, and the outlet of the throttling valve is connected with the inlet of the corresponding flowmeter.
8. The pipeline microleakage monitoring simulation experiment system of claim 7, wherein the natural gas pipeline is further provided with a natural gas inlet.
9. The pipeline microleakage monitoring simulation experiment system of claim 4, wherein the linear array sensor comprises a temperature sensor, a humidity sensor and a concentration sensor;
the temperature sensor is used for detecting the temperature of the water vapor;
the humidity sensor is used for detecting the humidity of the water vapor;
the concentration sensor is used for detecting the concentration of the natural gas.
10. The pipeline micro-leakage monitoring simulation experiment system of claim 1 or 2, wherein the collection processing system comprises a data collector, an optical fiber sending module, an optical fiber receiving module, a network communication terminal and an information management system;
all the linear array sensors are connected with the data collector through data acquisition lines, the data collector is connected with the optical fiber sending module, the optical fiber sending module is connected with the optical fiber receiving module, the optical fiber receiving module is connected with the network communication terminal, and the network communication terminal is connected with the information management system.
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| CN114607944A (en) * | 2022-02-24 | 2022-06-10 | 之江实验室 | Natural gas pipeline leakage monitoring device and method |
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