CN103277674A - System and method for detecting overheated position of pipeline - Google Patents
System and method for detecting overheated position of pipeline Download PDFInfo
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- CN103277674A CN103277674A CN2013101815522A CN201310181552A CN103277674A CN 103277674 A CN103277674 A CN 103277674A CN 2013101815522 A CN2013101815522 A CN 2013101815522A CN 201310181552 A CN201310181552 A CN 201310181552A CN 103277674 A CN103277674 A CN 103277674A
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Abstract
The invention discloses a system and method for detecting the overheated position of a pipeline and belongs to the filed of high-temperature gas leakage detection. The method for detecting the overheated position of the pipeline is characterized by comprising a first step that when high-temperature gas of the pipeline leaks or the surface of the pipeline is overheated due to the fact that a heat insulating layer is damaged, the temperature of the surrounding environment of adjacent pipelines rises rapidly, a temperature sensing element is conductive due to the heating function of the gas, and therefore whether the pipeline is overheated is judged; a second step that by the adoption of the above principle, changes of values of resistance of the AB end and the CD end are simultaneously detected, so that whether the pipeline is overheated is judged and the overheated position is determined. Compared with other detection systems, the system for detecting the overheated position of the pipeline has the advantages of being simple in structure, high in reliability and the like, and capable of synchronously achieving leakage judgment and position locating of the high-temperature gas pipeline. The system for detecting the overheated position of the pipeline plays a quite important role in guaranteeing safety of the high-temperature pipeline.
Description
Affiliated technical field
The present invention relates to the overheated location detection system of a kind of pipeline and method, belong to high-temperature gas leak detection field.
Background technique
Present method to high temperature conduit leakage/overheated monitoring mainly contains: (1) point temperature sensor: namely by arranging the temperature transducer of measuring point type at fragile and leakage position, judged whether that by the variation of responding to the conduit ambient air temperature gas leaks or pipeline is overheated.Because it is longer that general high temperature conduit piping is arranged, and have more link and movable part, need to arrange a large amount of temperature transducers that circuit is very numerous and diverse; Simultaneously, because the temperature transducer of point type only can be surveyed on the preset position, there is a large amount of measurement blind areas.(2) linear temperature sensor: main line detector mainly contains irrecoverable and can recover two kinds now: whether beyond retrievable provides the switching value signal by the conducting of cable, and renewable type provides analog signals by the variation of the resistance value between the cable.Yet these two kinds of probers all can only be realized providing alarm signal overheated the time and can't realize that it reveals the location of position.
The overheated position sensing technology of pipeline can be with being used for aircraft air conduit field of detecting.Pipeline is revealed or because the overheated proper functioning that not only influences downstream air feed subtense angle of pipeline that factors such as heat insulation layer destruction cause brings potential safety hazard also can for pipeline structure and parts on every side.Therefore, around the aircraft bleed air line, be necessary to arrange cover response fast, leakage/overheat detection system that reliability is high.Pipeline leakage/overheat detection the system of air conduit is the important component part of present aircraft fire detector system.
Summary of the invention
The invention provides a kind of simple in structure, reliability is high, and has the high temperature conduit overheat detection system and method for location hot spot ability.
The overheated location detection system of a kind of pipeline is characterized in that: be made up of AC lead, BD lead, a n heat detection primitive, a n+1 fixed value resistance; The corresponding pipeline search coverage of each heat detection primitive; N+1 fixed value resistance is series in the BD lead successively, has a probe node between two adjacent fixed value resistances, and n+1 fixed value resistance forms n probe node altogether; N heat detection primitive is connected between probe node and the AC lead successively; Above-mentioned heat detection primitive is in off state when temperature sensor is following, be on state when temperature sensor is above.
The detection method of the overheated location detection system of above-mentioned pipeline is characterized in that comprising following process: step 1, survey AB end resistance, meter is made R
ABSurvey CD end resistance, meter is made R
CDStep 2, whether overheated according to following rule judgment pipeline, reached thermal site: 3-1. works as R
AB, R
CDWhen being infinity, illustrate that pipeline is normal, do not have overheated place; 3-2. work as R
AB, R
CDWhen all not being infinitely great, calculate i, j, wherein i=R
AB/ R
0, j=R
CD/ R
0, the setting value resistance is R
0, judge whether i+j equals n+1: when i+j equaled n+1, it was overheated to the pipeline search coverage generation of i heat detection primitive correspondence of CD side counting successively to illustrate from the AB side; As i+j during greater than n+1, be system's wrong report, first removal system fault, execution in step 1 is to step 2 again; As i+j during less than n+1, there is the simultaneously overheated situation of system's wrong report and many places, detect earlier this moment and get rid of after the system failure again execution in step 1 to step 2, if execution in step 1 to step 2 also exists i+j less than n+1 again, illustrate that many places are simultaneously overheated, detect this moment by the AB side successively to the pipeline search coverage of i heat detection primitive correspondence of CD side counting and the pipeline search coverage of n+1-j heat detection primitive correspondence; 3-3. work as R
AB, R
CDOne of when being infinitely great, system's wrong report, first removal system fault, execution in step 1 is to step 2 again.
The present invention compares with other detection systems, has simple in structure, reliability advantages of higher, can realize leakage judgement and the location, position of high-temperature gas pipeline synchronously.This leak detection system is for ensureing that high temperature conduit has very important meaning safely.
Description of drawings
Fig. 1 is detection principle figure;
Fig. 2 is heat detection primitive schematic representation;
Number in the figure title: 1. heat detection primitive; 2. fixed value resistance; 3-1. lead AB; 3-2.CD.
Embodiment
According to shown in Figure 1, the overheated location detection system of pipeline of the present invention and method are made up of AC lead 3-1, BD lead 3-2, a n heat detection primitive 1, a n+1 fixed value resistance 2.Wherein, each heat detection primitive 1 corresponding pipeline search coverage.
According to shown in Figure 2, the heat detection primitive generally is made up of the temperature sensing cable line of two multiple twins, and every temperature sensing cable line comprises the temperature-sensitive insulation material around center conductor and the center conductor.Center conductor is made of plain conductor, and it is extremely low to have good electrical conductivity and resistance.Under the normal monitoring state, because the insulating effect of temperature-sensitive insulating material, temperature sensing cable line MX, NY are in state of insulation, and measuring unit is in off state; When the conduit high-temperature gas leaks or heat insulation layer when breaking, because the heat effect of gas, the temperature sensing cable environment temperature rises, when rising to the temperature sensor of temperature sensing cable, the resistance value of temperature-sensitive insulating material changes, then the resistance between temperature sensing cable line MX, the NY or electromotive force change, and just can detect this probe unit region by the resistance between measurement lead MX, the NY or electromotive force whether superheating phenomenon takes place.
According to shown in Figure 1, the quantity of the heat detection primitive among the present invention can be according to size and the quantity setting in leak detection zone, and the operating temperature of each heat detection primitive and monitoring range can be set respectively according to needs.When surveying leakage in order to be implemented in, location leakage region, the resistance R of employing similar resistance in the whole detection system
0Suppose in the circuit total total n heat detection primitive: if the AB side is overheated to the pipeline search coverage generation of i heat detection primitive correspondence of CD side counting successively, then the resistance value that records from the AB side is R
AB=iR
0, the resistance value that records from the CD side is R
CD=(n+1-i) R
0, send the pipeline heat alarm this moment and provide the position of concrete leakage according to the size of resistance; If AB side pipeline search coverage generation individual to the i of CD side counting, a j heat detection primitive correspondence successively is overheated, then the resistance value that records from the AB side is R
AB=iR
0, the resistance value that records from the CD side is R
CD=(n+1-j) R
0, detect this moment by the AB side successively to the pipeline search coverage of i heat detection primitive correspondence of CD side counting and the pipeline search coverage of n+1-j heat detection primitive correspondence; If it is overheated that the above search coverage in two places takes place, suppose that the nearest superheat region that the AB side is counted to the CD side successively is that i heat detection primitive, superheat region farthest are j heat detection primitive, then the resistance value that records from the AB side is R
AB=iR
0, the resistance value that records from the CD side is R
CD=(n+1-j) R
0, detect this moment by the AB side successively to the pipeline search coverage of i heat detection primitive correspondence of CD side counting and the pipeline search coverage of n+1-j heat detection primitive correspondence, detect finish after, the repetition aforementioned process is until all superheat regions of eliminating.
This system compares with other detection systems, has simple in structure, redundancy advantages of higher, forms by the resistance of selecting similar resistance for use and measures primitive, can realize leakage judgement and the location, position of high-temperature gas pipeline synchronously.For the support equipment security of operation, reduce the workload of revealing maintenance when taking place and have very important meaning.
Claims (3)
1. overheated location detection system of pipeline is characterized in that:
Formed by AC lead (3-1), BD lead (3-2), a n heat detection primitive (1), a n+1 fixed value resistance (2); The corresponding pipeline search coverage of each heat detection primitive (1);
N+1 fixed value resistance (2) is series in the BD lead (3-2) successively, has a probe node between adjacent two fixed value resistances (2), and n+1 fixed value resistance (2) forms n probe node altogether;
N heat detection primitive (1) is connected between probe node and the AC lead (3-1) successively;
Above-mentioned heat detection primitive (1) is in off state when temperature sensor is following, be on state when temperature sensor is above.
2. the overheated location detection system of pipeline according to claim 1, it is characterized in that: above-mentioned heat detection primitive (1) is made up of the temperature sensing cable line of two multiple twins, and every temperature sensing cable line is made up of the insulation of the temperature-sensitive around center conductor and center conductor material.
3. utilize the detection method of the overheated location detection system of the described pipeline of claim 1, it is characterized in that comprising following process:
Step 1, survey AB end resistance, meter is made R
ABSurvey CD end resistance, meter is made R
CD
Step 2, whether overheated according to following rule judgment pipeline reached thermal site:
3-1. work as R
AB, R
CDWhen being infinity, illustrate that pipeline is normal, do not have overheated place;
3-2. work as R
AB, R
CDWhen all not being infinitely great, calculate i, j, wherein i=R
AB/ R
0, j=R
CD/ R
0, setting value resistance (2) resistance is R
0, judge whether i+j equals n+1:
When i+j equaled n+1, it was overheated to the corresponding pipeline search coverage generation of i the heat detection primitive (1) of CD side counting successively to illustrate from the AB side;
As i+j during greater than n+1, be system's wrong report, first removal system fault, execution in step 1 is to step 2 again;
As i+j during less than n+1, there is the simultaneously overheated situation of system's wrong report and many places, detect earlier this moment and get rid of after the system failure again execution in step 1 to step 2, if execution in step 1 to step 2 also exists i+j less than n+1 again, illustrate that many places are simultaneously overheated, detect this moment by the AB side successively to i the heat detection primitive (1) of CD side counting corresponding pipeline search coverage and the corresponding pipeline search coverage of n+1-j heat detection primitive (1);
3-3. work as R
AB, R
CDOne of when being infinitely great, system's wrong report, first removal system fault, execution in step 1 is to step 2 again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310181552.2A CN103277674B (en) | 2013-05-16 | 2013-05-16 | System and method for detecting overheated position of pipeline |
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| CN201310181552.2A CN103277674B (en) | 2013-05-16 | 2013-05-16 | System and method for detecting overheated position of pipeline |
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| CN103277674B CN103277674B (en) | 2015-05-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198075A (en) * | 2014-08-26 | 2014-12-10 | 安徽蓝德仪表有限公司 | Recoverable type linear temperature detecting system |
| CN104198076A (en) * | 2014-08-26 | 2014-12-10 | 安徽蓝德仪表有限公司 | Multifunctional linear temperature sensor |
| CN105784287A (en) * | 2016-04-24 | 2016-07-20 | 中国大唐集团科学技术研究院有限公司西北分公司 | Temperature control resistor, and device and method of detecting leakage of expansion joints in heat supply pipeline |
| CN108955938A (en) * | 2018-07-02 | 2018-12-07 | 青岛汇安谷科技发展有限公司 | One kind being used for room temperature feed-line distributed fiber temperature measuring device and temp measuring method |
| CN111562071A (en) * | 2018-12-14 | 2020-08-21 | 空中客车西班牙有限责任公司 | Overheat detection system for aircraft |
| CN114076559A (en) * | 2020-08-19 | 2022-02-22 | 上海航天能源股份有限公司 | Pipeline deformation detection system |
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| WO2004063623A1 (en) * | 2003-01-13 | 2004-07-29 | Pure Technologies Ltd. | Pipeline monitoring system |
| JP2005299921A (en) * | 2004-03-16 | 2005-10-27 | Tokyo Gas Co Ltd | Storage facility and treating method of leaked gas |
| CN202252864U (en) * | 2011-09-14 | 2012-05-30 | 中国石油天然气集团公司 | Optical path system for monitoring leakage of natural gas pipeline based on optical fiber sensing |
| CN202302747U (en) * | 2011-09-21 | 2012-07-04 | 启东启控消声设备有限公司 | Leakage prevention gas pipeline water drainer |
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2013
- 2013-05-16 CN CN201310181552.2A patent/CN103277674B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004063623A1 (en) * | 2003-01-13 | 2004-07-29 | Pure Technologies Ltd. | Pipeline monitoring system |
| JP2005299921A (en) * | 2004-03-16 | 2005-10-27 | Tokyo Gas Co Ltd | Storage facility and treating method of leaked gas |
| CN202252864U (en) * | 2011-09-14 | 2012-05-30 | 中国石油天然气集团公司 | Optical path system for monitoring leakage of natural gas pipeline based on optical fiber sensing |
| CN202302747U (en) * | 2011-09-21 | 2012-07-04 | 启东启控消声设备有限公司 | Leakage prevention gas pipeline water drainer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198075A (en) * | 2014-08-26 | 2014-12-10 | 安徽蓝德仪表有限公司 | Recoverable type linear temperature detecting system |
| CN104198076A (en) * | 2014-08-26 | 2014-12-10 | 安徽蓝德仪表有限公司 | Multifunctional linear temperature sensor |
| CN105784287A (en) * | 2016-04-24 | 2016-07-20 | 中国大唐集团科学技术研究院有限公司西北分公司 | Temperature control resistor, and device and method of detecting leakage of expansion joints in heat supply pipeline |
| CN105784287B (en) * | 2016-04-24 | 2020-03-31 | 中国大唐集团科学技术研究院有限公司西北分公司 | Temperature control resistor, and device and method for detecting leakage of expansion joint in heat supply pipeline |
| CN108955938A (en) * | 2018-07-02 | 2018-12-07 | 青岛汇安谷科技发展有限公司 | One kind being used for room temperature feed-line distributed fiber temperature measuring device and temp measuring method |
| CN111562071A (en) * | 2018-12-14 | 2020-08-21 | 空中客车西班牙有限责任公司 | Overheat detection system for aircraft |
| CN111562071B (en) * | 2018-12-14 | 2022-05-24 | 空中客车西班牙有限责任公司 | Overheat detection system for aircraft |
| CN114076559A (en) * | 2020-08-19 | 2022-02-22 | 上海航天能源股份有限公司 | Pipeline deformation detection system |
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| CN103277674B (en) | 2015-05-20 |
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