CN2779211Y - Pipeline leakage detecting device - Google Patents
Pipeline leakage detecting device Download PDFInfo
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- CN2779211Y CN2779211Y CN 200520011492 CN200520011492U CN2779211Y CN 2779211 Y CN2779211 Y CN 2779211Y CN 200520011492 CN200520011492 CN 200520011492 CN 200520011492 U CN200520011492 U CN 200520011492U CN 2779211 Y CN2779211 Y CN 2779211Y
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Abstract
The utility model relates to a pipeline leakage detecting device for fluid convey. The utility model measures the pressure change signal of the pipeline leakage between two stations by a set of pressure transmitter arranged at each station of a pipeline. The pressure change signal of input and output of each station can carry out pressure travel beyond and pump start flow recognition by an automatic identification signal converting unit. The utility model tests the input and the output pressure signal of the station by an amplifying and comparison unit of delta value which is exported, controlled and switched by the automatic identification signal converting unit, and the delta value is amplified by a signal amplification and drive unit to drive an alarm unit. The utility model has the advantages of simple method, practicality, less devices and low investment. Particularly, an operated pipeline just needs to add less devices. The determination of the position of the leakage point is not very accurate but can fundamentally satisfy the actual demand. Simultaneously, the utility model can also carry out real-time alarm and prompt. The alarm of the utility model has the advantages of high sensitivity, high reliability, high automatization and convenient operation.
Description
Technical field
The utility model is the detection device that fluid-transporting tubing leaks.The measurement and the pipe-line system technical field that relate to hydrodynamic pressure.
Background technique
Fluid line is in operation always to produce for various reasons and leaks, and the pipeline grown of those service times particularly is such as corrosion failure, accidental force artificial or nature etc.The information of grasping perforation and accurate position in time all is very important for pipeline operation operation and manager.Therefore, countries in the world have all successively worked out the method and apparatus of multiple detection pipe leakage.As the optical fiber detection method of utilizing optical fiber technology to research and develop out, though this technology detects reliable, accurate positioning, even can perceive the information of excavating and touching pipeline, can strive for more time for fixing a breakdown.But because of it must be along the pipe installation optical cable, cost height not only, and must excavate, lay optical cable separately to the pipeline that has built up, its cost is just higher.The former Soviet Union had once developed a kind of the utilization leaks the ultrasonic detection technology that produces the ultrasound phenomenon.This technology also can reliably and detect the information of leakage accurately, only needs at certain intervals apart from ultrasonic wave sensor and detection device are installed.But still need be at fluid line commonly used or mountedly only increase many ultrasonic wave sensors and relevant device in addition outside the table, the cost height still seems.Add the detection that a spot of device just can be realized pipe leakage again if any a kind of existing mounted instrument of fluid line or Common Instrument utilized, wouldn't more convenient, simpler, more saving?
The model utility content
The purpose of this utility model be exactly designing institute a kind of simple, convenient, save, the reliable and detection device that leaks of fluid line accurately.
Because fluid line not only will produce ultrasound when leaking, generation-negative pressure is hit ripple in pipeline simultaneously, and is sent to upper and lower station by fluid.The utility model is according to this characteristic and utilize existing equipment to detect the detection of the method realization of suction wave in the pipeline to pipe leakage as far as possible.When pipeline took place to leak, negative pressure was hit ripple and is passed to adjacent upper and lower two stations-first, second station, is set at the sleeve pressure sensor perception in first, the second station, and had pressure diagram to change on the apparent real-time pressure tendency chart of the station at each station control machine screen.So we can arrive the time difference at first, second two stations and the position that two station differences time of advent mean value calculation repeatedly goes out pipe leakage respectively according to pipeline leakage signal; Here to be clipped to the time at two stations be that clock with every station is a benchmark to the leakage signal branch, and the clock at each station should be synchronous, preferably adopts a clock certainly.The variable signal of pressure drives warning through identification and amplification simultaneously.Position according to time difference of first, second two station variation in pressure and two station time differences mean value calculation pipe leakage repeatedly is very simple, and its pumping plant that occurs suction wave earlier to the formula of leakage point distance is:
In the formula: t
Inequality-suction wave is to first, second two station time differences N time mean value (s)
t
1-to the time that occurs the suction wave pumping plant earlier (s)
t
2-to after time (s) of suction wave pumping plant appears
Distance (km) between first and second liang of stations of L-
In this formula owing to following reason has certain error:
1, because the fluid in the pipeline has certain flow velocity, upwards the speed of (reverse) and downward (in the same way) transmission can be different for suction wave, can produce certain error to result of calculation, but the speed of transmitting in liquid because of suction wave is 1000m/s, and pipeline in fluid as the flow velocity of crude oil about 1m/s, this point is for crude oil pipeline, and its error can be ignored;
2, the time at the suction wave to the first and second of Guo Louing liang station is that clock with station control machine is a benchmark, and this just requires the clock at each station must be consistent.But in fact the clock at each station is independent, needs regularly, the unanimity during school and will walk the time, and is big as the school time error, or it is big to walk time error, all will bring error to result of calculation, as integrating error 2s in 24 hours, the error of 2000m just arranged.If transform existing station monitoring and control equipment certainly, a clock is all used at all stations, and that is when best;
3, pressure diagram is the per second scanning line of advancing in the general station monitoring and control equipment, different stations is clicked pressure diagram with mouse respectively and is fallen the break place suddenly, have some errors in time, it is exactly operations staff's operation meticulously again, also can the have an appointment error of a positive and negative scanning line so also can produce the error of about 2000m.
As from the foregoing, the position that utilizes existing station monitoring and control equipment to detect leakage point has some errors, but generally can be controlled in the 5000m, this concerning actual search the leakage point of course not very desirable, but also just passable.
The detection of leaking not only will show on the pressure tendency chart at the screen of station control machine and show also should have simultaneously timely and report to the police, and helps to remind the operation personnel in time to handle.Its Leak testtion is at each pipeline midship one cover pressure transmitter to be installed, and surveys the pressure that enters the station, sets off respectively.As long as advance or the pressure that sets off has suction wave, operation has been described or leakage point has been arranged.Amplify comparing unit with the Δ value and amplify, and this difference is amplified the driving warning device.
In fact the pressure overreach is arranged for midship and open the pump flow process.In order to distinguish these flow processs, identify the negative pressure wave signal of leakage exactly, adopt, promptly by comparing into and out of station pressure signal input into and out of the way of station pressure signal dual input, when selecting high level signal to carry out detected pressures overreach flow process, so just can double the warning precision.
In view of the above, this pipeline leakage testing device also is based on the existing equipment design of utilizing as much as possible, reduces to greatest extent and drops into.This device is converted to the current signal of pressure transmitter detection safe retainer or distributor, station monitoring and control equipment, automatic identification signal converting unit, Δ value amplification comparing unit, signal amplification driver element, alarm unit and the power subsystem composition of voltage signal by pressure transmitter.Owing to realize that pipeline leakage testing has leakage alarm and leakage point position to determine two-part, no matter and conveyance conduit is newly-built or runed, Pressure testing and station monitoring and control equipment are generally all arranged, so this device just there is no need to be provided with in addition a cover, can utilize existing device fully.As the leakage point position determine just can utilize the screen of existing station control machine to show the position that real-time pressure tendency chart and simple software for calculation calculate leakage point fully.And Pressure testing part-pressure transmitter, safe retainer or the distributor of the warning of pipeline leakage testing part equally also can utilize existing equipment in the pipeline fully, automatic identification signal converting unit, Δ value only need be set separately amplify that comparing unit, signal amplify driver element, alarm unit and the power subsystem of powering for their gets final product (as shown in Figure 1).Therefore this device just be reduced to by be arranged on enter the station with the pipeline that sets off on two pressure transmitters two-way voltage signal that detected pressure change signal is changed through safety retainer or distributor be connected the input end that is input to automatic identification signal converting unit, it is exported by relay J
101The contact switch the input that the Δ value is amplified comparing unit, the output of this Δ value amplification comparing unit connects signal amplification driver element and alarm unit is reported to the police, and power subsystem amplifies comparing unit, signal amplification driver element and alarm unit power supply to automatic identification signal converting unit, Δ value respectively.Except reporting to the police, for observing more intuitively, can also add a movingcoil instrument driver element to drive the trend that pointer instrument shows the current pressure value for the operation personnel, this unit is to connect the output of amplifying comparing unit from the Δ value.Same this driver element is also powered by power subsystem.Realization for ease of identified leakage signal and circuit composition, the input signal of this device is from entering the station and set off the two-way pressure signal, the comparison amplifier that is made of operational amplifier of automatic identification signal converting unit wherein and two-stage amplifier are thereafter formed as can be seen from Figure 2, it is input as enter the station a pressure signal and a departures pressure signal, is output as relay J
101, control the input that the Δ value is amplified comparing unit with the closure of its contact.It is the essentially identical amplification circuit of two-way that the Δ value is amplified comparing unit, one tunnel input circlult and adjustable capacitor is arranged wherein just, and actual is exactly delay input signal, and output is an amplification Δ value that has postponed.The two-way amplification circuit be input as two pressure signal or two departures pressure signals of entering the station.When no leakage signal, signal amplifies driver element no-output, relay J
201Do not work, the Δ value is amplified the pressure signal that enters the station or set off that is input as of comparing unit, and this Δ value is amplified comparing unit does not have Δ value variation output; When leakage signal (negative pressure signal), signal amplifies driver element has the Δ value to change output, relay J
201Work, its normally opened contact is connected, and normally-closed contact disconnects.When leakage signal, signal amplifies driver element work, relay J
201Normally opened contact connect, make alarm unit work.This alarm unit is selected audio oscillator circuit LM556, power magnification circuit and loudspeaker for use.The output of comparing unit is also amplified in the input of movingcoil instrument driver element from the Δ value, directly amplified by operational amplifier to drive its load-movingcoil instrument.Power subsystem is transformation, rectification, filtered three grades of mu balanced circuits, and every grade of mu balanced circuit output respectively is a part of circuit unit power supply.This device adopts so circuit formation, detects departures pressure when opening the pump flow process automatically.When pressure overreach flow process, detect the pressure that enters the station automatically.Do like this, pressure overreach flow process warning precision doubles, in case can overcome when opening the pump flow process suction wave constant and drawback of reporting to the police of pressure that enters the station is arranged, and can produce response to negative pressure signal reliably and reports to the police.
Embodiment
Embodiment: following with one on petroleum pipeline the test and successful example model utility is further described.This example has been applied on the iron Qin crude oil pipeline.Each midship enter the station and departures place pipeline on 1 pressure transmitter, safe retainer or distributor respectively are installed, measure time (clock with station control machine is a benchmark) and two station time differences, 5 times mean value that variation in pressure (suction wave of pipe leakage) signal between two stations arrives two stations respectively, in view of the above and the distance between two stations (be determine number), just can calculate and produce the particular location that leaks.And the warning (see figure 2) of pipe leakage is to be discerned through automatic identification signal converting unit by turnover station each two-way signal of pressure to detect the pressure that enters the station or set off, when suction wave is arranged, the Δ value is amplified the driving alarm unit reports to the police, also drive simultaneously movingcoil instrument, indication current pressure variation tendency.Its device is by electrical schematic diagram assembling shown in Figure 2, and components and parts are pressed and marked selection on the figure.Wherein the first order is automatic identification signal converting unit by operational amplifier μ pc157A or TA7506M (1) amplification of making comparisons, after connect the amplifier that the two-stage discrete component is formed, the load of final amplifier is a relay J
101, select HH53P, select to switch and to enter the station or exit signal, will enter the station or exit signal is given the Δ value and amplified comparing unit.The Δ value is amplified comparing unit and is made of two cover discrete component level Four amplifiers, wherein the input resistance R of a cover amplifier
401After connect an adjustable big electrochemical capacitor postponing input, and by hand push button and R
401A small resistor R in parallel
409, in order to the warning test of circuit, the input of two cover amplifiers is by relay J
101The pressure signal that enters the station or set off is taken from control, when negative pressure signal.One the road in time amplifies, and one the tunnel postpones the back amplifies, and the output that the Δ value is amplified comparing unit divides two-way, and one the tunnel connects to the relatively amplification movingcoil instrument driver element of being made up of operational amplifier μ pc157A, and the pointer that directly drives movingcoil instrument 89C48 rotates; Another road connects to signal amplifies driver element, and this signal amplifies driver element to be made up of relatively amplifying with two-stage discrete component amplifier thereafter of operational amplifier μ pc157A or TA7506M (1), and the load of final amplifier is a relay J
201, model is HH53P, by the input of its contact control alarm unit.Signal amplifies the output of the input of driver element from the amplifier of Δ value amplification comparing unit, when negative pressure signal, the Δ value that the Δ value that No. one amplifier amplifies and another road amplifier have postponed to amplify relatively produces difference and is added to the signal amplifier driver element and promotes relay J
201, J
201The normally opened contact closure promotes relay J
602The normally opened contact closure provides the alarm unit power supply.Alarm unit then selects for use audio frequency oscillator intergrated circuit LM556 and power magnification circuit to promote loudspeaker Y 601 sounding sound.Power subsystem by transformer, full wave rectifier, filtering, voltage stabilizing after output 24V amplify comparing unit and signal amplifies the driver element power supply to automatic identification signal converting unit, Δ value; This 24V voltage is powered to alarm unit through a three-terminal voltage-stabilizing circuit 7812 again, through 2 mu balanced circuit A
4, A
5(selecting the 723HC integrated package for use) output+10V is respectively to automatic identification signal converting unit A
1, the signal operational amplifier A of amplifying driver element
2Operational amplifier A with the movingcoil instrument driver element
3Power supply.
This device is installed on probation through completely, actual measurement warning precision Δ P ↓ 〉=0.025Mpa, time t≤150 second, as long as have perforation or this device of holing to report to the police on the pipeline, sensitivity can be satisfied actual demand, the degree of accuracy height, and can discern automatically, easy and simple to handle.Enable completely all in the time more than a year behind this device hole for 4 times leakage of oils none fail to report, in time take measures to provide in time, information accurately, avoided bigger loss.
As seen the model utility method is simple, practical, and device therefor is few, drops into and economizes, and particularly for the pipeline of having runed, only needs to increase small number of devices and gets final product.Though determining of leakage point position is very inaccurate, can satisfy actual demand substantially yet.But also Realtime Alerts prompting simultaneously also can the instrument indication.And that warning device is reported to the police is highly sensitive, accurately and reliably, the automaticity height, easy and simple to handle.
Claims (7)
1, a kind of detection device of pipe leakage, comprise pressure transmitter, the current signal of pressure transmitter output is converted to safe retainer or the distributor and the station monitoring and control equipment of voltage signal, it is characterized in that leakage alarm is by automatic identification signal converting unit, the Δ value is amplified comparing unit, signal amplifies driver element, alarm unit and power subsystem are formed, by be arranged on to enter the station in the every station of pipeline and departures place pipeline on two pressure transmitters the pressure change signal that measures is converted to the input end that voltage signal is received automatic identification signal converting unit through security device or distributor, it is exported by relay J
101The contact switch the input that the Δ value is amplified comparing unit, the output of this Δ value amplification comparing unit is reported to the police through signal amplification driver element and alarm unit, and power subsystem amplifies comparing unit, signal amplification driver element and alarm unit power supply to automatic identification signal converting unit, Δ value respectively.
2, the detection device of pipe leakage according to claim 1, it is characterized in that being arranged on enter the station in the every station of pipeline and departures place pipeline on pressure transmitter be one, the pressure signal that is recorded by each No. one pressure transmitter that enters the station and set off changes the unit as automatic identification signal biography after conversion input compares identification and switches, the pressure change signal that each No. one pressure transmitter that enters the station and set off records amplifies the input of comparing unit as the Δ value after conversion, obtain the Δ value of the departures or the variation in pressure that enters the station and amplified.
3, the dual-stage amplifier that the detection device of pipe leakage according to claim 1 and 2, the feature of described automatic identification signal converting unit comparator that to be this unit be made up of operational amplifier and output thereof connect constitutes, and final amplifier is by relay J
101Contact control after the input of amplifying comparing unit of the Δ value that connects.
4, the detection device of pipe leakage according to claim 1 and 2, described Δ value is amplified the feature of comparing unit and is made up of the two-way amplifier, each road amplifier is one tunnel enter the station pressure signal or departures pressure signal input, and this two-way amplifier removes in the first order input circlult of No. one amplifier and one group of big electric capacity, R are arranged
401And the R of company
409Outside push-button switch, all the other formations are all identical, and the two-way amplifier is output as the two-way of signal amplification driver element and relatively imports.
5, the detection device of pipe leakage according to claim 1 and 2, the feature that described signal amplifies driver element is made of operational amplifier comparator of forming and the dual-stage amplifier that the back is connected in series, the input of comparator is from the output of the two-way amplifier of prime Δ value amplifying unit, and final amplifier is output as relay J
201, by the input of its contact control alarm unit.
6, the detection device of pipe leakage according to claim 1 and 2, the feature of described alarm unit are to be made of LM556 series audio oscillator circuit and power magnification circuit, loudspeaker, and the Δ value is amplified the output of comparing unit and passed through relay J
201The switching of contact drives relay J
602Make audio oscillator circuit that the power supply power supply be arranged, audio oscillation, signal add to power magnification circuit and drive loudspeaker warning output.
7, the detection device of pipe leakage according to claim 1 and 2, it is characterized in that being connected in parallel to the movingcoil instrument driver element in the output of Δ value amplification comparing unit and the input of signal amplification driver element, this movingcoil instrument driver element is made of operational amplifier and movingcoil instrument, the output of the two-way amplifier that is input as Δ value amplification comparing unit of amplifier, movingcoil instrument directly is connected in the output circuit of amplifier, to drive movingcoil instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520011492 CN2779211Y (en) | 2005-04-06 | 2005-04-06 | Pipeline leakage detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520011492 CN2779211Y (en) | 2005-04-06 | 2005-04-06 | Pipeline leakage detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779211Y true CN2779211Y (en) | 2006-05-10 |
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ID=36753299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520011492 Expired - Fee Related CN2779211Y (en) | 2005-04-06 | 2005-04-06 | Pipeline leakage detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2779211Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514021C (en) * | 2005-04-06 | 2009-07-15 | 中国石油天然气股份有限公司 | Method and apparatus for detecting pipe leakage |
| CN102494247A (en) * | 2011-10-28 | 2012-06-13 | 北京嘉华思创科技有限公司 | Gas leakage detection method based on voice frequency characteristic recognition and failure remote detector |
| CN101684894B (en) * | 2008-09-27 | 2014-08-06 | 中国石油天然气股份有限公司 | Method and device for monitoring pipeline leakage |
-
2005
- 2005-04-06 CN CN 200520011492 patent/CN2779211Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514021C (en) * | 2005-04-06 | 2009-07-15 | 中国石油天然气股份有限公司 | Method and apparatus for detecting pipe leakage |
| CN101684894B (en) * | 2008-09-27 | 2014-08-06 | 中国石油天然气股份有限公司 | Method and device for monitoring pipeline leakage |
| CN102494247A (en) * | 2011-10-28 | 2012-06-13 | 北京嘉华思创科技有限公司 | Gas leakage detection method based on voice frequency characteristic recognition and failure remote detector |
| CN102494247B (en) * | 2011-10-28 | 2013-12-18 | 北京嘉华思创科技有限公司 | Gas leakage detection method based on voice frequency characteristic recognition |
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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: 20060510 |