CN201561826U - High risk area pipeline body stress monitoring system based on meet an emergency - Google Patents
High risk area pipeline body stress monitoring system based on meet an emergency Download PDFInfo
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- CN201561826U CN201561826U CN2009202467588U CN200920246758U CN201561826U CN 201561826 U CN201561826 U CN 201561826U CN 2009202467588 U CN2009202467588 U CN 2009202467588U CN 200920246758 U CN200920246758 U CN 200920246758U CN 201561826 U CN201561826 U CN 201561826U
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Abstract
The utility model relates to a high risk area pipeline body stress monitoring system based on meet an emergency. Relates to the technical field of pipeline systems. The device consists of a strain gauge, a potential balance demodulator, a multi-channel strain acquisition box, a data converter, an automatic acquisition box, a GPRS transmission module, a GPRS receiving module, a lower computer and an alarm; the output of all strain gauges and potential balance demodulator is connected with multichannel strain acquisition box, the output of multichannel strain acquisition box is connected with data converter, the output of data converter is connected with automatic acquisition box, the input and output of automatic acquisition box are connected with GPRS transmission module, the input and output of GPRS transmission module are connected with GPRS receiving module, the input and output of GPRS receiving module are connected with lower computer, and the output of lower computer is connected with alarm. The utility model discloses spatial resolution is high, with low costs.
Description
Technical field
The utility model is a kind of high risk area's pipeline body stress monitoring system based on strain.Relate to the piping system technical field.
Background technology
Pipeline is subjected to the influence of the high risk area of a lot of pipeline processes in the operation management process safe, wherein influencing one of the most serious high risk area is abominable geologic media, be subjected to big flood, landslide, earthquake, unsettled, geologic media such as wash away and landforms change, illegal pipeline accounts for pressure etc. influence, pipeline body safety is subjected to very big threat.Wherein main influence is exactly that change has taken place for the force-bearing situation of pipeline itself, and the pipeline local stress is sharply increased, and causes pipe stress or strain to lose efficacy when serious, causes destroying, thereby pipeline accident takes place.
In pipeline transportation history, geologic hazard once repeatedly caused pipeline accident.U.S. WILLIAMS-DARLING Ton natural gas line company between nineteen ninety-five to 1999 year because geologic hazard causes 5 pipeline accidents altogether: near the area Kalama of Washington in 1997, the landslide causes 26 inches trunk pipe-line accidents, causes large tracts of land fracture, displacement; Near the Washington North Bonneville in 1999,26 inches trunk pipe-line accidents that the landslide causes cause that the pipeline many places are broken, water conservancy project is on every side all ruined.Europe natural gas line casualty data group (EGIG) investigation 1970 in the West Europe pipeline accident of calendar year 2001, the 7%th, cause by geologic hazard; 1984 of DOT statistics show that to 2001 natural gas transport data 8.5% accident is caused by geologic hazard.
Analyze the geographical geologic condition in distributed areas and this zone of China's oil and gas pipes, be not difficult to find out, the geologic hazard type that present domestic pipeline faces mainly contains: one, earth's crust internal structure changes the geologic hazard that causes, (as earthquake, surface collapse (sedimentation), ground fissure, fracture disaster etc.); Two, the geologic hazard that causes of earth's crust external environment condition sudden change (as landslide (collapsing), rubble flow, flood erosion, sand bury, wind erosion etc.); Three, the geologic hazard (as collapsible loess, swelled ground, saliferous clay, ever frost etc.) that causes of the special soil body.The lattice trombone slide road of wherein having built just passes through Qinghai-Tibet tectoclase band, and southwestern products pipeline passes through Yunnan, river distributed fault, and also has ground fissure to distribute within the border in Jiangsu, eastern section, Henan two provinces of West-East National Gas Transmission Project.Major part all is in the location, loess plateau in the West-East National Gas Transmission Project.Active sand dune (ridge) movability is extremely strong, and moving direction is vertical with pipeline.If the pipeline earthing is blown away by wind, will cause pipeline exposed unsettled, if surpass the pipeline flexural strength, pipeline will fracture.Through pipeline Force Calculation result is shown: after the unsettled length of pipeline surpasses critical value, under multiple stress, will make pipeline material lose efficacy, crack even break.Tectoclase may cross pipeline, can produce tangible traction action to pipeline, and serious can cause cracking destruction, shortening pipeline life, influences the pipeline operation management.
In the face of numerous pipeline geologic hazards, the pipeline operator of China is often taked positive engineering control measure, but also there are some drawbacks in these measures, it at first is the cost height, next is that prevention and cure project is not " putting things right once and for all " yet, the uncertain factor of design and construction is more, moreover the cycle of administering is long.The monitoring then be a kind of efficiently, prophylactico-therapeutic measures cheaply.Williams company has proposed full pipe safety evaluation and the improvement system of a cover based on the pipe stress strain monitoring at a lot of accidents that Northwest Pipeline landslide problem causes.Italy SNAM company will monitor the main mode of pipeline as the control landslide disaster, and they have carried out reaching the monitoring in 30 years to pipeline, have successfully avoided a large amount of pipeline accidents.
Electric resistance wire strain gauge, string shake formula strainometer and distributing optical fiber sensing technology (is representative with BOTDR) in the existing certain application of pipeline monitoring.Above-mentioned these monitoring modes are confined to carry out independent monitoring to causing calamity body or pipeline, also the pipeline under the geologic hazard influence are not carried out the combined monitoring of system.Based on fiber grating sensing technology, be used in the pipeline under landslide and the influence thereof has been carried out combined monitoring, the monitoring content comprises thrust monitoring and the pipeline strain monitoring of landslide to pipeline, and the monitoring of landslide surface displacement and deep displacement.But, only be applied at present in the monitoring to landslide disaster based on fiber grating sensing technology, the monitoring of other geologic hazard is not also used.
High risk area's pipeline body monitoring safety status method for early warning and system based on strain, can to be subjected to big flood, landslide, earthquake, unsettled, the monitoring that the pipeline of various forms of geologic hazards under influencing carried out pipeline body mechanical property safe condition such as wash away, from guaranteeing pipe safety in essence.Not only can judge active situation, the growth rule of development, the failure mechanism of high risk area's disaster, can also find out influence mode and the degree of disaster, the more important thing is the stress change in displacement rule that to grasp steel pipe, judge the safe class of pipeline pipeline.Comprehensive above information just can be carried out safe early warning to pipeline landslide, forecasts the precarious position of pipeline in advance, for the mitigation design for scheme implements to provide foundation.Based on the high risk area's pipeline body monitoring safety status method for early warning and the system of strain, represented pipeline to be subjected to high risk area's disaster to influence the trend of monitoring.
Our company has applied for " landslide is to the monitoring and pre-alarming method and the system of pipeline influence " (application number is 200810119556.7) before this, " construction method of monitoring and warning pipeline landslide surface displacement method and system and system " (application number is 200810119558.6), " construction method of monitoring and warning pipeline landslide depth displacement method and system and system " (application number is 200810119557.1) and many patents of invention of " construction method of monitoring and warning pipeline landslide method and system and system " (application number is 200810119558.6).Above-mentioned application is mainly around the influence of landslide to pipeline, the method for table portion and deep landslide displacement monitoring and early warning, and the construction method of monitoring and early warning system.
The utility model content
High risk area's pipeline body monitoring safety status early warning system that the purpose of this utility model is a kind of spatial resolution height of design, cost is low based on strain.
The utility model proposes a kind of high risk area's pipeline body monitoring safety status early warning system based on strain, by the mechanics of piping supervisory system pipeline body mechanical property is monitored in real time, adopt GPRS long distance wireless transmission technology that monitor signal is in time fed back to Surveillance center, the pipe stress situation is carried out multidimensional calculate, realize dangerous early warning and safe condition evaluation fast.
This based on the formation of high risk area's pipeline body stress monitoring system of strain as shown in Figure 4, it is by foil gauge, potential balance (FBG) demodulator, hyperchannel strain acquirement device, data converter, vasculum, GPRS transport module, GPRS receiver module, next bit computer and alarm are formed automatically.The output of all foil gauges and potential balance (FBG) demodulator connects hyperchannel strain acquirement device, the output of hyperchannel strain acquirement device connects data converter, the output of data converter connects automatic vasculum, automatically input, the output of vasculum are connected with the GPRS transport module, the input of GPRS transport module, output are connected with the GPRS receiver module, the input of GPRS receiver module, output are connected with next bit computer, and next bit computer output is connected with alarm.
Hyperchannel strain acquirement device is measured the resistance variations of the foil gauge that each passage collects, and changes it into electric signal; Voltage reading numerical value 1000 ± 100mV that the potential balance (FBG) demodulator is measured; Data converter changes each passage electric signal into digital signal; Automatic vasculum control data acquisition time and number of times that data converter output connects, monitoring variable is sent to the GPRS transport module, and the signal of accepting the GPRS transport module controls, if receiving terminal cuts out, the signal that then collects is kept in the internal memory of automatic vasculum automatically; The GPRS transport module is transferred to the receiving terminal that is positioned at office with each monitoring variable that automatic vasculum obtains by public's cordless communication network, also can receive the signal of receiving terminal, sends to next bit computer; The signal of next bit computer download terminal GPRS receiver module, and calling program calculates automatically and analyzes, and draws each stress value such as pipeline axial stress, circumference stress, major principal stress, shear stress; Analysis result and alarming threshold value are compared, by the display demonstration and by alarm equipment alarm.
Wherein:
Foil gauge is in a plurality of measuring point (see figure 1)s of pipeline upper edge circumferential arrangement, and each measuring point is installed foil gauge (see figure 2), foil gauge be arranged as axial strain sheet 4 and the hoop strain sheet shape that meets at right angles, 45 ° of foil gauges 5 are positioned at (see figure 3) on 45 ° of lines at right angle; Also have usually temperature compensation foil gauges of adapted (each measuring point strain rosette connects) all to stick on the base material with the pipeline same material;
Hyperchannel strain acquirement device: be used to measure the resistance variations of the foil gauge that each passage collects, change it into electric signal;
Data converter: be used for changing each passage electric signal into digital signal;
Automatic vasculum: be used for control data acquisition time and number of times, monitoring variable is sent to the GPRS transport module, and the signal of accepting the GPRS transport module controls, if receiving terminal cuts out, the signal that then collects is kept in the internal memory of automatic vasculum automatically;
The GPRS transport module: each monitoring variable that is used for automatic vasculum is obtained is transferred to the receiving terminal that is positioned at office by public's cordless communication network, also can receive the signal of receiving terminal, sends to next bit computer;
The receiving terminal that is positioned at office comprises following 3 parts:
1) GPRS receiver module: be used to receive the monitoring variable that field monitoring station GPRS transport module sends, and be transferred to the terminal next bit computer, send feedback command also can for on-the-spot GPRS transport module;
2) next bit computer and program are used for the signal of download terminal GPRS receiver module, and calling program calculates automatically and analyze, and draw pipeline axial stress, circumference stress, major principal stress, each stress value such as shear stress; Analysis result and alarming threshold value are compared, implement in the time of necessary to report to the police, program is self-editing;
3) alarm, being used for analysis result is that the sound alarm signal takes place above alarming threshold value; Alarm is by next bit computer and programmed control.
Based on the electric principle of high risk area's pipeline body stress monitoring early warning system of strain as shown in Figure 5, the PC joint of resistance strain gage connects the PC joint of DH3816 dynamic strain indicator (being hyperchannel strain acquirement device), and the CH1 of potential balance (FBG) demodulator end also connects the PC joint of DH3816 dynamic strain indicator simultaneously; The PC joint of dynamic strain indicator is connected with the PC joint of A/D converter, the LAN interface of A/D converter is connected with the LAN interface of DH3816 data acquisition device (being automatic vasculum), the R232 of DH3816 data acquisition device is connected with the R232 of GPRS transport module, the gsm system of GPRS transport module connects GPRS network, GPRS network connects the gsm system of GPRS transport module, the R232 of GPRS transport module is connected with the R232 of next bit computer, and the R232 of next bit computer connects the DS7400 alarm.
The utility model can be applicable on the body defects fast detecting and location of field, oil and gas pipes station, refinery, oil field oil recovery pipe network and long defeated main pipeline, for work such as the detection of defective and reparation are implemented to lay the foundation.This The Application of Technology will increase the science of pipeline operational management to greatest extent, improve the pipeline integrity management level, reduce the pipeline operation risk, reduce accident rate, reduce the loss of people's lives and properties, with technological means service conduit safety.Have very high application prospect and economic benefit, social benefit is also very remarkable.
Description of drawings
Fig. 1 measuring point is arranged sectional drawing
The paster location of Fig. 2 foil gauge
Fig. 3 foil gauge arrangenent diagram
Fig. 4 pipeline strain Fundamentals of Supervisory Systems block diagram
Fig. 5 pipeline strain monitoring system electrical schematic diagram
1-hoop line 2-axial line wherein
3-foil gauge 4-axial strain sheet
5-45 ° of foil gauge 6-hoop strain sheet
Embodiment
Embodiment. this example is a pilot system, and carries out test on a certain products pipeline.
Based on the formation of high risk area's pipeline body monitoring safety status early warning system of strain as shown in Figure 4, the PC joint of resistance strain gage connects the PC joint of DH3816 dynamic strain indicator, and the CH1 of potential balance (FBG) demodulator end also connects the PC joint of DH3816 dynamic strain indicator simultaneously; The PC joint of dynamic strain indicator is connected with the PC joint of A/D converter, the LAN interface of A/D converter is connected with the LAN interface of DH3816 data acquisition device, the R232 of DH3816 data acquisition device is connected with the R232 of GPRS transport module, the gsm system of GPRS transport module connects GPRS network, GPRS network connects the gsm system of GPRS transport module, the R232 of GPRS transport module is connected with the R232 of next bit computer, and the R232 of next bit computer connects the DS7400 alarm.
Hyperchannel strain acquirement device is measured the resistance variations of the foil gauge that each passage collects, and changes it into electric signal; Voltage reading numerical value 1000 ± 100mV that the potential balance (FBG) demodulator is measured; Data converter changes each passage electric signal into digital signal; Automatic vasculum control data acquisition time and number of times that data converter output connects, monitoring variable is sent to the GPRS transport module, and the signal of accepting the GPRS transport module controls, if receiving terminal cuts out, the signal that then collects is kept in the internal memory of automatic vasculum automatically; The GPRS transport module is transferred to the receiving terminal that is positioned at office with each monitoring variable that automatic vasculum obtains by public's cordless communication network, also can receive the signal of receiving terminal, sends to next bit computer; The signal of next bit computer download terminal GPRS receiver module, and calling program calculates automatically and analyzes, and draws each stress value such as pipeline axial stress, circumference stress, major principal stress, shear stress; Analysis result and alarming threshold value are compared, by the display demonstration and by alarm equipment alarm.
Based on the electric principle of high risk area's pipeline body stress monitoring early warning system of strain as shown in Figure 5, the PC joint of resistance strain gage connects the PC joint of DH3816 dynamic strain indicator (being hyperchannel strain acquirement device), and the CH1 of potential balance (FBG) demodulator end also connects the PC joint of DH3816 dynamic strain indicator simultaneously; The PC joint of dynamic strain indicator is connected with the PC joint of A/D converter, the LAN interface of A/D converter is connected with the LAN interface of DH3816 data acquisition device (being automatic vasculum), the R232 of DH3816 data acquisition device is connected with the R232 of GPRS transport module, the gsm system of GPRS transport module connects GPRS network, GPRS network connects the gsm system of GPRS transport module, the R232 of GPRS transport module is connected with the R232 of next bit computer, and the R232 of next bit computer connects the DS7400 alarm.
Wherein:
Foil gauge is in 8 measuring point (see figure 1)s of pipeline upper edge circumferential arrangement, and each measuring point is installed foil gauge (see figure 2), foil gauge be arranged as axial strain sheet 4 and the hoop strain sheet shape that meets at right angles, 45 ° of foil gauges 5 are positioned at (see figure 3) on 45 ° of lines at right angle; The temperature compensation foil gauge of adapted (each measuring point strain rosette connect one) sticks on the base material with the pipeline same material routinely;
Dynamic strain indicator (hyperchannel strain acquirement device) is selected DH3816 (60 passage) dynamic strain measurement system for use;
Data converter is selected city's pin product for use;
The potential balance (FBG) demodulator is selected city's pin product for use;
Data acquisition device (being automatic vasculum) is selected DH3816 for use;
The GPRS transport module is selected Siemens MC 35i for use;
The next bit computer choosing M4600 of Kaitian of association;
Alarm is selected DS7400 for use.
Hyperchannel strain acquirement device, data converter, automatic vasculum, GPRS transport module are installed in the field monitoring station.
GPRS receiver module, next bit computer and program, alarm are installed in office as receiving terminal.
This example is tested through test of many times, its spatial resolution height, cost are low, its application has increased the science of pipeline operational management to greatest extent, the pipeline integrity management level have been improved, reduce the pipeline operation risk, reduce accident rate, reduce the loss of people's lives and properties, with technological means service conduit safety.
Claims (3)
1. high risk area's pipeline body stress monitoring system based on strain is characterized in that it is by foil gauge, potential balance (FBG) demodulator, hyperchannel strain acquirement case, data converter, vasculum, GPRS transport module, GPRS receiver module, next bit computer and alarm are formed automatically; The output of all foil gauges and potential balance (FBG) demodulator connects hyperchannel strain acquirement case, the output of hyperchannel strain acquirement case connects data converter, the output of data converter connects automatic vasculum, automatically input, the output of vasculum are connected with the GPRS transport module, the input of GPRS transport module, output are connected with the GPRS receiver module, the input of GPRS receiver module, output are connected with next bit computer, and next bit computer output is connected with alarm;
Hyperchannel strain acquirement device is measured the resistance variations of the foil gauge that each passage collects, and changes it into electric signal; Voltage reading numerical value 1000 ± 100mV that the potential balance (FBG) demodulator is measured; Data converter changes each passage electric signal into digital signal; Automatic vasculum control data acquisition time and number of times that data converter output connects, monitoring variable is sent to the GPRS transport module, and the signal of accepting the GPRS transport module controls, if receiving terminal cuts out, the signal that then collects is kept in the internal memory of automatic vasculum automatically; The GPRS transport module is transferred to the receiving terminal that is positioned at office with each monitoring variable that automatic vasculum obtains by public's cordless communication network, receives the signal of receiving terminal, sends to next bit computer; The signal of next bit computer download terminal GPRS receiver module, and calling program calculates automatically and analyzes, and draws pipeline axial stress, circumference stress, major principal stress, each stress value of shear stress; Analysis result and alarming threshold value are compared, by the display demonstration and by alarm equipment alarm.
2. the high risk area's pipeline body stress monitoring system based on strain according to claim 1, the electric principle that it is characterized in that this system is: (PC) joint of resistance strain gage connects (PC) joint of DH3816 dynamic strain indicator, and (CH1) of potential balance (FBG) demodulator end also connects (PC) joint of DH3816 dynamic strain indicator simultaneously; (PC) joint of dynamic strain indicator is connected with (PC) joint of A/D converter, (LAN) interface of A/D converter is connected with (LAN) interface of DH3816 data acquisition device, the R232 of DH3816 data acquisition device is connected with the R232 of GPRS transport module, the gsm system of GPRS transport module connects GPRS network, GPRS network connects the gsm system of GPRS transport module, the R232 of GPRS transport module is connected with the R232 of next bit computer, and the R232 of next bit computer connects the DS7400 alarm.
3. the high risk area's pipeline body stress monitoring system based on strain according to claim 1, it is characterized in that foil gauge is to arrange a plurality of measuring points on pipeline, each measuring point is installed foil gauge, foil gauge be arranged as axial strain sheet (4) and the hoop strain sheet shape that meets at right angles, 45 ° of foil gauges (5) are positioned on 45 ° of lines at right angle.
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- 2009-10-30 CN CN2009202467588U patent/CN201561826U/en not_active Expired - Lifetime
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