CN202074237U - Pipeline leakage monitoring and negative pressure protecting device - Google Patents
Pipeline leakage monitoring and negative pressure protecting device Download PDFInfo
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- CN202074237U CN202074237U CN2011201772294U CN201120177229U CN202074237U CN 202074237 U CN202074237 U CN 202074237U CN 2011201772294 U CN2011201772294 U CN 2011201772294U CN 201120177229 U CN201120177229 U CN 201120177229U CN 202074237 U CN202074237 U CN 202074237U
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- negative pressure
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- leakage
- vacuum pump
- stop valves
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Abstract
The utility model relates to a pipeline leakage monitoring and negative pressure protecting device, which comprises a monitoring device and a negative pressure protecting device, wherein the monitoring device comprises a first pressure transmitter and a second pressure transmitter; a first PLC (programmable logic controller) data acquisition device is electrically connected with the first pressure transmitter; the second pressure transmitter is electrically connected with a second PLC data acquisition device; a control circuit is electrically connected with the first PLC data acquisition device and the second PLC data acquisition device, receives signals of the first PLC data acquisition device and the second PLC data acquisition device, and analyzes and processes to control the work of the negative pressure protecting device; when leakage occurs, the pressure of a leakage part is reduced caused by differential pressure inside and outside a pipeline, liquid around the leakage part supplements the leakage part, negative pressure fluctuation is generated in the pipeline, so that pressure sensors at the two ends of the pipeline receive instantaneous pressure information of the pipeline to judge the occurrence of the leakage as the negative pressure is spread upstream and downstream from a leak source; and the pipeline leakage monitoring and negative pressure protecting device is sensitive to a sudden leakage, can detect the leakage within 3 minutes and has high sensitivity.
Description
Technical field
The utility model relates to a kind of line leakage and negative pressure protective gear, belongs to petroleum pipeline conveying technology field.
Background technique
Leakage is the major failure of oil transport pipeline operation.Particularly in recent years, oil transport pipeline develop into one of key areas of the national economic development, it also is huge to environment damage and harm along with development, the stolen that wherein is perforated and corrosion failure cause leakage accident to occur repeatedly, seriously disturb ordinary production, caused enormous economic loss.Therefore, the research of oil transport pipeline leakage monitoring system and emergency response becomes pipeline industry problem demanding prompt solution.Advanced pipe leakage automatic monitoring technical can in time be found to leak, and takes emergency measures rapidly, takes place thereby significantly reduce the stolen case, reduces oil leakage loss, has tangible economic benefit, environmental benefit and international community's benefit.
The present situation of domestic and international oil transport pipeline leakage monitoring technology
Oil transport pipeline Leakage Detection technology has at home and abroad obtained using widely, and flourishing state such as the U.S. sets up method and requires pipeline must take effective leak detection system.The oil transport pipeline leak hunting method mainly contains three classes: bioanalysis, hardware approach and software approach.
1, biological method
This is a kind of traditional leak detection detecting method, mainly be personnel selection or trained animal (dog) along pipeline walking check piping attachment abnormal conditions, hear the smell that discharges in the pipeline, listening etc., this method is accurately direct, but real-time is poor, expends a large amount of manpowers.
2, hardware approach
Mainly contain visual inspection device, acoustic detector, gas detector, pressure detector etc., the visual inspection device is a temperature variation of utilizing the temperature sensor measurement leak, as uses the multisensor cable along pipe laying.Acoustic detector is that fluid outflow pipeline can be sounded when leaking generation, and sound wave is propagated according to the speed of the physical property decision of pipeline inner fluid, and voice detector detects this ripple and finds to leak.As the acoustics leak detection system (wavealert) of houston, u.s.a sound system company (ASI) according to this principle development, form by many groups sensor, decoder, wireless launcher etc., antenna elevates above the soil and control centre's contact, and the restriction of the examined scope of this method must be along a lot of sound transducers of piping erection.Gas detector then need use the portable gas sampler along pipe walking, and the gas that leaks is detected.
3, software approach its data such as the flow that provides by the SCADA system, pressure, temperature are provided, the method by flow or variation in pressure, quality or volumetric balance, dynamic model and pressure spot analysis software detects leaks.Offshore company pays much attention to the safe operation of oil transport pipeline, line leakage technology comparative maturity, and obtained using widely.Shell Co. Ltd has gone out the novel pipeline leak detection system that a kind of brand name is ATMOS Pine through the long term studies Development and Production, ATMOS Pine is based on statistical analysis principle and designs, utilize optimization analytic method (sequential probability-ratio test method) mensuration pipeline import and export flow and the overall behavior of pressure to change and leak, have advanced person's pattern identification function simultaneously concurrently to detect.This system can detect the leakage of 1.6kg/s and false alarm not take place.Present domestic oil field long distance oil pipeline does not mostly have or detects single installation Leakage Detection system, and main the pipeline service data is by manually reading by manually making an inspection tour along pipeline, and this situation is very unfavorable to the safe operation of pipeline.China's long distance oil pipeline leakage monitoring Study on Technology begins existing relevant report from the nineties, but is just really to make a breakthrough in nearly 2 years, plays a role aborning.Research was all done on the one hand at this by Department of Automation of Tsing-Hua University, precision type instrument institute of University Of Tianjin, Peking University, University of Petroleum etc.As: the pipeline running state and the leakage monitoring system (pressure wave method) of University Of Tianjin's development have been installed to Hua County section at first stop in Puyang, middle network county (Central Plains-Luoyang), the leak detection system (based on suction wave, in conjunction with pressure gradient method) that northeast pipeline office used Tsing-Hua University's development in 1993 has carried out site test.
Above detecting method respectively has pluses and minuses, and the method that adopts several different methods to combine usually causes system huge, complicated, and sensitivity is low.
The model utility content
Problem to be solved in the utility model is in order to overcome above-mentioned the deficiencies in the prior art, a kind of simple in structure, highly sensitive line leakage and negative pressure protective gear to be provided.
In order to address the above problem, the utility model by the following technical solutions: line leakage and negative pressure protective gear is characterized in that: comprise monitoring device and negative pressure protective gear, monitoring device comprises:
First pressure transmitter is arranged on the pipeline front end, is used to monitor the suction wave of pipeline front end, and produces electrical signal;
Second pressure transmitter is arranged on rear end of pipeline, is used to monitor the suction wave of rear end of pipeline, and produces electrical signal;
The first plc data collector is electrically connected with first pressure transmitter, is used to receive the signal of first pressure transmitter;
The second plc data collector is electrically connected with second pressure transmitter, is used to receive the signal of second pressure transmitter;
Control circuit is electrically connected with the first plc data collector, the second plc data collector, receives the signal of the first plc data collector, the second plc data collector, and analyzes, handles the work with control negative pressure protective gear.
As further improvement in the technical proposal:
Described negative pressure protective gear comprises:
First Electric Actuated Stop Valves is arranged on the front end of first pressure transmitter;
Second Electric Actuated Stop Valves, first vacuum pump and first safety check, second Electric Actuated Stop Valves, first vacuum pump and first safety check series connection back are in parallel with first Electric Actuated Stop Valves;
First Electric Actuated Stop Valves, second Electric Actuated Stop Valves and first vacuum pump are electrically connected with control circuit.
Described negative pressure protective gear comprises:
The 3rd Electric Actuated Stop Valves is arranged on the rear end of second pressure transmitter;
The 4th Electric Actuated Stop Valves, the 3rd vacuum pump and second safety check, the 4th Electric Actuated Stop Valves, the 3rd vacuum pump and second safety check series connection back are in parallel with the 3rd Electric Actuated Stop Valves;
The 3rd Electric Actuated Stop Valves, the 4th Electric Actuated Stop Valves and the 3rd vacuum pump are electrically connected with control circuit.
Described first vacuum pump is parallel with second vacuum pump, and second vacuum pump has different flows with first vacuum pump.
Described the 3rd vacuum pump is parallel with the 4th vacuum pump, and the 4th vacuum pump has different flows with the 3rd vacuum pump.
When oil transport pipeline takes place to leak, the fluid of leak runs off along leaking breach, pressure descends, the fluid of leakage point both sides flows to leakage point rapidly and flows, fill up the hole of causing because of loss, this process phase upstream and downstream is successively transmitted, and its effect is equivalent to leak and has produced a pressure wave of propagating with certain speed.When the pressure before leaking was Reference standard, the pressure wave that produces because of leakage just became suction wave.The velocity of propagation of suction wave in fluid is 1000-1200m/s.Because the waveguide effect of tube wall, suction wave can be propagated tens kilometers distances far away, thereby adopts the suction wave detection technique to monitor reliably the leakage of long distance pipeline.
Propagate into the time difference of upstream and downstream and the position that the manifold pressure velocity of wave propagation just can be extrapolated leakage point according to leaking the suction wave that produces,
The single pressure sensor negative pressure wave method is front end P
1With rear end P
2Each installs a pressure transducer, i.e. pressure transmitter, and the length of establishing pipeline is L, P
XBe leakage point, leakage point is apart from front end P
1Distance be X, the negative pressure velocity of wave propagation is V, the speed of pipeline inner fluid is P
0, the time that suction wave passes to first rear end is respectively t
1, t
2, then have:
The front and back ends suction wave difference time of advent is:
Pressure-wave propagation speed generally speaking is about 1050 meter per seconds, and the speed of fluid is about the 1.5-3 meter per second, in the therefore top formula
Can ignore, formula can be reduced to:
Separating this equation is:
；
Therefore, as long as know duct length L in theory, the time difference of the suction wave that the speed V of pressure propagation and front and back ends receive in the fluid just can in the hope of the position of leak source.
The utility model adopts such scheme, compared with prior art, has the following advantages: form by monitoring device and negative pressure protective gear, and relatively simple for structure; When long distance pipeline takes place to leak, leak is because the pipeline inside and outside differential pressure, make the abrupt pressure reduction of leak, liquid around the leak is because the existence of pressure reduction is additional to leak, in pipeline, produce the negative pressure fluctuation, process makes progress from leak source like this, propagate in the downstream, and with exponential damping, this fluctuation of pressure drop and normal pressure fluctuation are different, the instantaneous pressure information of the pressure transducer receiving pipeline of pipe ends, and judge the generation of leaking, responsive for sudden leakage, can in 3min, detect, be suitable for detecting the negative pressure fluctuation of character such as irresistible and drilling hole of oil stolen, highly sensitive.
Below in conjunction with drawings and Examples the utility model is further described.
Description of drawings
Accompanying drawing 1 is the structural representation of negative pressure protective gear among the utility model embodiment;
Accompanying drawing 2 is the schematic diagram of monitoring device among the utility model embodiment;
Among the figure,
The 1-pipeline, 2-upstream pumping unit, 3-downstream pump station, the 4-pipe section, 5-first pressure transmitter, 6-second pressure transmitter, 7-first Electric Actuated Stop Valves, 8-the 3rd Electric Actuated Stop Valves, 9-second Electric Actuated Stop Valves, 10-first vacuum pump, 11-second vacuum pump, 12-first safety check, 13-second safety check, 14-the 3rd vacuum pump, 15-the 4th Electric Actuated Stop Valves, 16-the 4th vacuum pump, the 17-leak source.
Embodiment
Embodiment; as Fig. 1; shown in Figure 2; line leakage and negative pressure protective gear; be arranged on the pipeline 1 between upstream pumping unit 2 and the downstream pump station 3; need monitor with negative pressure pipe section 4 and protect; comprise monitoring device and negative pressure protective gear; monitoring device is included in first pressure transmitter 5 of pipe section 4 front ends setting and second pressure transmitter 6 that is provided with in pipe section 4 rear ends; first pressure transmitter 5 is electrically connected with the first plc data collector; second pressure transmitter 6 is electrically connected with the second plc data collector; the first plc data collector; the second plc data collector is electrically connected with control circuit; control circuit and negative pressure protective gear; upstream pumping unit 2 and downstream pump station 3 are electrically connected, and are used for controlling the work of negative pressure protective gear.
The negative pressure protective gear comprises first Electric Actuated Stop Valves 7, second Electric Actuated Stop Valves 9, the 3rd Electric Actuated Stop Valves 8, the 4th Electric Actuated Stop Valves 15, first vacuum pump 10, second vacuum pump 11, the 3rd vacuum pump 14, the 4th vacuum pump 16, first safety check 12 and second safety check 13.
First Electric Actuated Stop Valves 7 is arranged between first pressure transmitter 5 and the upstream pumping unit 2, second Electric Actuated Stop Valves 9, second vacuum pump 11 and first safety check, 12 series connection backs are in parallel with first Electric Actuated Stop Valves 7, second vacuum pump 11 is in parallel with first vacuum pump 10, and the flow of second vacuum pump, 11 to the first vacuum pumps 10 is big;
The 3rd Electric Actuated Stop Valves 8 is arranged between second pressure transmitter 6 and the downstream pump station 3, the 4th Electric Actuated Stop Valves 15, the 3rd vacuum pump 14 and second safety check, 13 series connection backs are in parallel with the 3rd Electric Actuated Stop Valves 8, the 4th vacuum pump 16 is in parallel with the 3rd vacuum pump 14, and the flow of the 4th vacuum pump 16 to the three vacuum pumps 14 is big;
First Electric Actuated Stop Valves 7, second Electric Actuated Stop Valves 9, the 3rd Electric Actuated Stop Valves 8, the 4th Electric Actuated Stop Valves 15, first vacuum pump 10, second vacuum pump 11, the 3rd vacuum pump 14 and the 4th vacuum pump 16 are electrically connected with control circuit.
Claims (5)
1. line leakage and negative pressure protective gear, it is characterized in that: comprise monitoring device and negative pressure protective gear, monitoring device comprises:
First pressure transmitter (5) is arranged on the pipeline front end, is used to monitor the suction wave of pipeline front end;
Second pressure transmitter (6) is arranged on rear end of pipeline, is used to monitor the suction wave of rear end of pipeline;
The first plc data collector is electrically connected with first pressure transmitter (5), is used to receive the signal of first pressure transmitter (5);
The second plc data collector is electrically connected with second pressure transmitter (6), is used to receive the signal of second pressure transmitter (6);
Control circuit is electrically connected with the first plc data collector, the second plc data collector, receives the signal of the first plc data collector, the second plc data collector, and analyzes, handles the work with control negative pressure protective gear.
2. line leakage as claimed in claim 1 and negative pressure protective gear is characterized in that: described negative pressure protective gear comprises:
First Electric Actuated Stop Valves (7) is arranged on the front end of first pressure transmitter (5);
Second Electric Actuated Stop Valves (9), first vacuum pump (10) and first safety check (12), second Electric Actuated Stop Valves (9), first vacuum pump (10) and first safety check (12) series connection back are in parallel with first Electric Actuated Stop Valves (7);
First Electric Actuated Stop Valves (7), second Electric Actuated Stop Valves (9) and first vacuum pump (10) are electrically connected with control circuit.
3. line leakage as claimed in claim 1 or 2 and negative pressure protective gear is characterized in that: described negative pressure protective gear comprises:
The 3rd Electric Actuated Stop Valves (8) is arranged on the rear end of second pressure transmitter (6);
The 4th Electric Actuated Stop Valves (15), the 3rd vacuum pump (14) and second safety check (13), the 4th Electric Actuated Stop Valves (15), the 3rd vacuum pump (14) and second safety check (13) series connection back are in parallel with the 3rd Electric Actuated Stop Valves (8);
The 3rd Electric Actuated Stop Valves (8), the 4th Electric Actuated Stop Valves (15) and the 3rd vacuum pump (14) are electrically connected with control circuit.
4. line leakage as claimed in claim 2 and negative pressure protective gear is characterized in that: described first vacuum pump (10) is parallel with second vacuum pump (11).
5. line leakage as claimed in claim 3 and negative pressure protective gear is characterized in that: described the 3rd vacuum pump (14) is parallel with the 4th vacuum pump (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201772294U CN202074237U (en) | 2011-05-30 | 2011-05-30 | Pipeline leakage monitoring and negative pressure protecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201772294U CN202074237U (en) | 2011-05-30 | 2011-05-30 | Pipeline leakage monitoring and negative pressure protecting device |
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| CN202074237U true CN202074237U (en) | 2011-12-14 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822097A (en) * | 2012-11-16 | 2014-05-28 | 国际商业机器公司 | Method and device for estimating wave velocities of negative-pressure waves in liquid delivery pipelines |
| WO2017185547A1 (en) * | 2016-04-29 | 2017-11-02 | 刘金玉 | Fluid leakage monitoring device and method |
| CN109357165A (en) * | 2018-12-18 | 2019-02-19 | 中国石油天然气集团公司 | A kind of gas pipeline Trunk Line pressure drop rate monitoring alarm and method |
| CN109357170A (en) * | 2018-12-18 | 2019-02-19 | 中国石油天然气集团公司 | Trunk Line pressure drop rate monitoring alarm in a kind of station of gas pipeline initial station |
| CN109357164A (en) * | 2018-12-18 | 2019-02-19 | 中国石油天然气集团公司 | A kind of gas pipeline point defeated station main pipeline booster monitoring, alarming and interlock |
| CN109555976A (en) * | 2018-12-18 | 2019-04-02 | 中国石油天然气集团公司 | Gas pipeline terminal main line pressure drop rate monitoring, alarming interlock and method |
| CN109555975A (en) * | 2018-12-18 | 2019-04-02 | 中国石油天然气集团公司 | A kind of gas pipeline point defeated station main pipeline booster monitoring, alarming and interlocking method |
| CN109578817A (en) * | 2018-12-18 | 2019-04-05 | 中国石油天然气集团公司 | A kind of gas pipeline terminal main line pressure drop rate monitoring, alarming interlocking method |
| CN109611692A (en) * | 2018-12-18 | 2019-04-12 | 中国石油天然气集团公司 | Gas pipeline point defeated station main pipeline booster monitoring, alarming interlock and method |
| CN110345388A (en) * | 2019-07-18 | 2019-10-18 | 中铁二院工程集团有限责任公司 | Pipe gallery water supply and sewerage pipeline booster monitoring method |
| CN110566821A (en) * | 2019-09-09 | 2019-12-13 | 山东拙诚智能科技有限公司 | method for realizing downstream pipe network leakage detection by monitoring pressure state of pressure regulating device |
| CN110805832A (en) * | 2019-11-22 | 2020-02-18 | 绵阳科大久创科技有限公司 | High-pressure hydrogen storage and pipeline transportation safety system |
| CN114508703A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | System and method for treating low-lying corrosion leakage of high-sulfur natural gas pipeline |
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2011
- 2011-05-30 CN CN2011201772294U patent/CN202074237U/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10240999B2 (en) | 2012-11-16 | 2019-03-26 | International Business Machines Corporation | Method and apparatus of estimating wave velocity of negative pressure wave in a fluid transportation pipeline |
| CN103822097B (en) * | 2012-11-16 | 2016-11-16 | 国际商业机器公司 | The method and device of the velocity of wave of suction wave is estimated in fluid-transporting tubing |
| US9534979B2 (en) | 2012-11-16 | 2017-01-03 | International Business Machines Corporation | Method and apparatus of estimating wave velocity of negative pressure wave in a fluid transportation pipeline |
| CN103822097A (en) * | 2012-11-16 | 2014-05-28 | 国际商业机器公司 | Method and device for estimating wave velocities of negative-pressure waves in liquid delivery pipelines |
| WO2017185547A1 (en) * | 2016-04-29 | 2017-11-02 | 刘金玉 | Fluid leakage monitoring device and method |
| CN109578817A (en) * | 2018-12-18 | 2019-04-05 | 中国石油天然气集团公司 | A kind of gas pipeline terminal main line pressure drop rate monitoring, alarming interlocking method |
| CN109611692B (en) * | 2018-12-18 | 2021-03-30 | 中国石油天然气集团有限公司 | Main pipeline pipe burst monitoring and alarming interlocking device and method for gas pipeline branch and transmission station |
| CN109357170A (en) * | 2018-12-18 | 2019-02-19 | 中国石油天然气集团公司 | Trunk Line pressure drop rate monitoring alarm in a kind of station of gas pipeline initial station |
| CN109555976A (en) * | 2018-12-18 | 2019-04-02 | 中国石油天然气集团公司 | Gas pipeline terminal main line pressure drop rate monitoring, alarming interlock and method |
| CN109555975A (en) * | 2018-12-18 | 2019-04-02 | 中国石油天然气集团公司 | A kind of gas pipeline point defeated station main pipeline booster monitoring, alarming and interlocking method |
| CN109357165A (en) * | 2018-12-18 | 2019-02-19 | 中国石油天然气集团公司 | A kind of gas pipeline Trunk Line pressure drop rate monitoring alarm and method |
| CN109611692A (en) * | 2018-12-18 | 2019-04-12 | 中国石油天然气集团公司 | Gas pipeline point defeated station main pipeline booster monitoring, alarming interlock and method |
| CN109357164A (en) * | 2018-12-18 | 2019-02-19 | 中国石油天然气集团公司 | A kind of gas pipeline point defeated station main pipeline booster monitoring, alarming and interlock |
| CN109357164B (en) * | 2018-12-18 | 2021-09-03 | 中国石油天然气集团有限公司 | Main pipeline pipe burst monitoring alarm and interlocking device for gas pipeline branch transmission station |
| CN109611692B8 (en) * | 2018-12-18 | 2021-04-23 | 中国石油天然气集团有限公司 | Main pipeline pipe burst monitoring and alarming interlocking device and method for gas pipeline branch and transmission station |
| CN110345388A (en) * | 2019-07-18 | 2019-10-18 | 中铁二院工程集团有限责任公司 | Pipe gallery water supply and sewerage pipeline booster monitoring method |
| CN110566821B (en) * | 2019-09-09 | 2021-01-12 | 山东拙诚智能科技有限公司 | Method for realizing downstream pipe network leakage detection by monitoring pressure state of pressure regulating device |
| CN110566821A (en) * | 2019-09-09 | 2019-12-13 | 山东拙诚智能科技有限公司 | method for realizing downstream pipe network leakage detection by monitoring pressure state of pressure regulating device |
| CN110805832A (en) * | 2019-11-22 | 2020-02-18 | 绵阳科大久创科技有限公司 | High-pressure hydrogen storage and pipeline transportation safety system |
| CN114508703A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | System and method for treating low-lying corrosion leakage of high-sulfur natural gas pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20140530 |