KR100906936B1 - A leak location measuring method and system for a fluid material pipeline, using a sensing delay of two points - Google Patents

Abstract

A leak location measuring method and system for a fluid pipe are provided to estimate an accurate leakage location by using the measurement values of manometers and flowmeters installed in the fluid pipe. A leak location measuring method for a fluid pipe comprises a step in which a transfer constant according to the kind of fluid is input(S10), a step of estimating the density of fluid flowing in the fluid pipe and the location of the fluid according to kind(S20), a step of, when a leakage is detected at a spot, recording the leakage sensing time and senses a leakage at another spot(S40), and a step of, when the leakage is detected at another spot, estimating a leak location using the sensing time difference between the two spots and the transfer constant according to the kind of fluid(S50).

Description

A leak location measuring method and system for a fluid material pipeline, using a sensing delay of two points}

The present invention relates to a method and apparatus for estimating a leak location using a difference between the leak detection times of two points and a transfer constant for each oil type in the pipeline, when leakage is received from pressure gauges installed at two points in the pipeline. .

The present invention also relates to a method and an apparatus capable of estimating a leak location in any case using a change in pressure when the fluid is stopped and a change in flow rate when the fluid is flowing.

In addition, the present invention relates to a method and apparatus for estimating a leak location using a transfer constant for each oil type obtained by experimenting with a speed at which a change in pressure or flow rate is transmitted according to density.

In general, an oil pipeline is an oil or petroleum pipe that is transported over a very long distance of several tens or hundreds of kilometers. Oil pipelines for the transport of oil, etc., require oil storage and pressurization facilities in addition to oil pipelines. A reservoir is a place to store or ship petroleum, etc. transported to a pipeline, and a pressurized facility is a facility that maintains an appropriate pressure in the pipeline to transport oil. Pressurized facilities should be installed at oil refineries, which are the starting point of oil pipelines, and major intermediate points so that pressure can be smoothly supplied to the oil storage stations by supplementing the pressure drop by long distance transportation. On the other hand, the oil pipeline may not transport a single item like a gas pipeline or a crude oil pipeline, but may carry various oils such as gasoline, kerosene, diesel, and aviation through a single tube. At this time, the pressure should be maintained so that different oil types do not mix with each other.

The most important thing in managing these pipelines is to prevent leakage. Oil leakage in pipelines can be caused by a number of causes. For example, when an oil pipe pipe leaks due to aging, such as corrosion, leaks due to damage to the pipe due to a change in the ground, such as an earthquake, the pipe may be damaged by vibration in a nearby construction site. Oil spills are economically detrimental due to oil leakage, but spills into areas where oil pipelines are buried, which also has a significant negative impact on environmental issues. In particular, the cost is considerable because the damage due to leakage occurring in the adjacent area where the pipe is buried must be compensated. In addition, there are many cases where oil is drilled through the oil pipe to drain the oil itself. In particular, it is very difficult to establish a surveillance system at every point of a pipeline because pipelines are long, typically tens to hundreds of kilometers in length.

Therefore, it is one of the most desirable preventive measures to detect leakage of oil pipes and their position accurately and quickly and to take countermeasures immediately. That is, a technique for accurately and quickly detecting oil leakage and an oil leak position of an oil pipe is needed.

In addition to oil pipelines, various methods of detecting or locating leaks or leaks occurring in piping are introduced. For example, by installing a water detection sensor on the outside of the pipe to detect water leaking out when leaks occur, or by installing a pressure sensor on the pipe to detect water leaks by using a lower pressure. Is used. Such detection schemes may determine that the leak or leakage location is located where the detection sensor is located as soon as the detection sensor detects a leak or leakage. However, the sensing methods have a disadvantage in that the cost is too high to be installed and used in a tube having a very long length such as an oil pipeline.

A technique for automatically detecting a leak by detecting a drop in pressure is disclosed in [Korean Patent Registration No. 10-0496125 (published on May 16, 2013), "Leak Monitoring System"] (hereinafter, referred to as Prior Art 1). The prior art includes a plurality of control valves for regulating the supply of water supplied through each supply pipe; A plurality of pressure sensors installed in a supply pipe near each control valve to measure water pressure therein; The reference pressure value for comparing the measured pressure value received from the pressure sensor is set, and if the measured pressure is lower or more than the set range than the reference pressure or gradually lower than the control panel judging as a leak; have.

In addition, the technique of measuring the flow rate of each section of the fluid flow pipe to compare the amount to detect the leak [Korean Patent No. 10-0527011 (released November 9, 2005), "Water leak in the water pipe and automatic leak section Measurement method "] (hereinafter, referred to as Prior Art 2). The prior art relates to a method for automatically measuring the amount of leakage and leakage section of the water pipe line, it is blocked by the unit from the water supply basin or water purification plant to each customer, and the precision electronic flow meter and the flow rate in the inlet and discharge lines of each block Each device is provided with a device for transmitting information, and a method for measuring leakage is compared with the flow rate of the inflow line and the summed flow rate of the discharge line by constantly monitoring the flow rate information transmitted from the installed flow meter.

Prior art 1, as described above, in order to accurately determine the location of the leak in the water pipes by the pressure sensor method, it is necessary to install a pressure sensor in the water pipe at regular intervals. However, it is not easy to install multiple pressure sensors because the pipelines are quite long, tens to hundreds of kilometers long and the pipelines are buried underground. In addition, in order to determine the location of leaks or leaks in each of the prior art 2 degrees section, it is necessary to install a flow meter for each section. Due to the length problem of the oil pipe, which is the same reason as before, the prior art 2 is not easy to use in reality.

In addition, all the prior art targets the flow of water, such as running water. However, the fluid flowing through the oil pipe may be various oil types such as gas oil, gasoline, etc. in addition to water. In addition, due to the nature of the operation of the oil pipe to transfer several oil species to a single oil pipe, when the transfer of one oil type is completed, the other oil species are transferred directly to the oil pipe in succession, so most of the two or more oil species flow in the oil pipe at the same time.

Once the transmission for the oil is completed, another oil can be sent directly to the pipeline. In this case, two or more oil species may flow simultaneously in the pipeline.

Therefore, in monitoring and countermeasures due to leakage of oil pipes, there is an urgent need for a technique capable of accurately identifying the location of oil leakage while using less flow or pressure sensors. In addition, even when several oil species flow simultaneously, a technique for identifying a leak location is required.

An object of the present invention is to solve the problems as described above, when the pressure measurement is input from the pressure gauge installed at two points of the oil pipe is leaked, the difference between the leak detection time of the two points, and the transfer constant for each oil type in the oil pipe The present invention provides a method and apparatus for estimating a leak location using a difference in detection time between two points due to a delivery constant for each oil type in an oil pipeline.

Another object of the present invention is to estimate the leakage position in any case by using a change in pressure when the fluid is stopped and a change in flow rate when the fluid flows, and the change in pressure or flow rate is transmitted according to the density. The present invention provides a method and apparatus for estimating a leak location using a difference in detection time between two points due to a delivery constant for each type in an oil pipeline, by estimating a leak location using a previously obtained transfer constant for each oil type by experimenting with the speed.

In order to achieve the above object, the present invention uses a leak gauge position estimator to find a leak position when a leak is detected by inputting a measurement value from a pressure gauge or a flow meter installed at two points of an oil pipeline, and thus detecting between points by a transfer constant for each oil type in the pipeline. A method of estimating a leak location using a time difference, the method comprising: (a) receiving a transfer constant for each oil type; (b) estimating position information for each oil species, including the density and the position of the fluid flowing in the oil pipe; (c) detecting leakage by receiving measurement values from pressure gauges or flow meters installed at the two points; (d) if leakage is detected at one of the points, recording the leakage detection time and detecting leakage at another point; (e) estimating the leak location using the difference between the leak detection times of the two points and the transfer constant for each oil type when leak leakage is detected at different points.

The present invention is a method of estimating a leak position using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipe, in the step (a), the delivery constant for each oil type is the measured delivery rate of the pressure or flow rate of the fluid Characterized in that the constant value can be obtained according to the density.

The present invention is a method for estimating a leak position using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipe, in step (b), the density and flow rate of the fluid from the density meter and the flow meter installed at the two points It is continuously input, and calculates the difference in time between the time when the fluid starts to flow and the time of measurement and the flow rate flowed, it is characterized by estimating the position of the fluid flow in the pipeline according to the density.

The present invention is a method of estimating a leak position using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe, the step (c) or (d), the measurement value input from the pressure gauge or flow meter to the previous measurement value Compared to the reference value range is characterized in that it detects as leakage.

The present invention is a method for estimating a leak position using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe, wherein step (c) or (d) is measured from the flow meter when the fluid is flowing in the oil pipe It is characterized by detecting the leakage by using the measured value, and when the fluid is stopped in the oil pipe, the leakage is detected by using the measured value measured from the pressure gauge.

The present invention relates to a leak location estimation using difference of the two point-to-point detection time by yujong specific propagation constant in the pipeline, the step (e), when the fluid flowing in the pipeline, a leak location X _C [Formula 1].

[Equation 1]

Where L is the distance between the two points, v _F , v _R are the forward and reverse transfer constants,

[Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0.

The present invention formula If in the leakage position estimation method using difference between both point-to-point detection time by yujong specific propagation constant in the pipeline, the step (e) is that the fluid is stopped within the pipeline, a leak location X _C [ 2].

[Formula 2]

Where L is the distance between the two points, v is the transfer constant,

[Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0.

The present invention is a method for estimating a leak location using the difference in the detection time between the two points by the delivery constant for each oil type in the pipeline, step (e), if there is one or more oil species in the pipeline, each oil species at each position in the pipeline It is characterized by estimating the transfer constant for each type according to the oil leakage position, the position of the difference between the total transfer time and the leakage detection time obtained by the transfer constant for each oil type is the minimum.

In addition, the present invention relates to a leak location estimation device using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe to find the location of leakage by receiving the measured values from the pressure gauge or flow meter installed at two points of the oil pipe As, the transfer constant input unit for receiving the transfer constant for each kind; A position information estimator for estimating position information for each oil type, including a density and a position of a fluid flowing in the oil pipe; A measurement information input unit for receiving measurement values from a pressure gauge or a flow meter installed at the two points; A leakage detection unit for detecting leakage by the change of the input measurement value, and recording a point and time at which leakage is detected; When leakage oil is detected at the two points of the oil pipe, the oil leakage position estimating unit for estimating the oil leakage position using the difference between the oil leakage detection time of the two points and the transfer type for each oil type.

The present invention is an oil leakage position estimating apparatus using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe, wherein the transfer constant input unit, the constant which can obtain the measured transfer rate of the pressure or flow rate of the fluid according to the density It is characterized by determining the transfer constant for each species by the value.

The present invention is an oil leakage position estimating apparatus using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe, wherein the position information estimating unit, the density and the flow rate of the fluid from the density meter and the flow meter installed at the two points continuously It is characterized by estimating the position of the fluid flow in the pipeline according to the density by calculating the difference between the time from the time the fluid starts to flow and the time until the measurement time flowed into the flow.

The present invention is an oil leakage position estimating apparatus using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipe, wherein the oil leakage detecting unit, if the measured value input from the pressure gauge or flow meter is out of the reference value range compared to the previous measurement value It is characterized by detecting as leakage.

The present invention is an oil leakage position estimating device using the difference in the detection time between the two points by the oil type transfer constant in the oil pipe, wherein the oil leak detection unit, the oil leakage using the measured value measured from the flow meter when the fluid flows in the oil pipe If the fluid is stopped in the oil pipe, characterized in that for detecting the leakage using the measurement value measured from the pressure gauge.

The present invention is a, if the leakage position estimating portion, the fluid flowing in the pipeline, leakage position X _C in yujong per pass leakage using difference of the two point-to-point detection time by a constant position estimator in the pipeline [Formula 3 ] To calculate.

[Equation 3]

Where L is the distance between the two points, v _F , v _R are the forward and reverse transfer constants,

[Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0.

The present invention provides an oil leakage position estimating apparatus using a difference in detection time between two points due to a delivery constant for each oil type in an oil pipe. The oil leakage position estimating unit is a fluid leakage position X _C when 4].

[Equation 4]

Where L is the distance between the two points, v is the transfer constant,

[Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0.

The present invention is an oil leakage position estimating apparatus using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipe, wherein the oil leak position estimating unit, if there is at least one oil type in the oil pipe, It is characterized by estimating the transfer constant for each oil type, the position of the difference between the total transfer time and the leakage detection time obtained by the transfer constant for each oil type is the minimum leakage position.

As described above, according to the method and apparatus for estimating a leak position using a difference in detection time between two points by a transfer constant for each oil type in an oil pipeline according to the present invention, when leakage occurs, the oil leakage position is measured by a pressure gauge or a flow meter installed in the pipeline. By grasping, the effect of estimating the leaked oil position can be obtained more simply and more accurately when the fluid is stopped or flowing.

In addition, according to the method and apparatus for estimating a leak location using a difference in detection time between two points by a transfer constant for each oil type in an oil pipeline according to the present invention, a leak gauge or a pressure gauge may be installed only at two points, for example, two points. The effect of identifying the position is obtained.

In addition, according to the oil leakage position estimation method and apparatus using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipeline according to the present invention, by measuring the density and flow rate of the fluid at both points to position by oil type in the oil pipeline By grasping and determining the transfer constant by oil type in advance, the effect of estimating the leakage location using only the transfer constant and the estimated fluid position is obtained.

DETAILED DESCRIPTION Hereinafter, specific contents for carrying out the present invention will be described with reference to the drawings.

In addition, in describing this invention, the same code | symbol is attached | subjected and the repeated description is abbreviate | omitted.

First, the overall leak detection and leak location estimation system for the implementation of the present invention will be described with reference to FIG. 1 is a diagram illustrating an overall leak detection and leak location estimation system for implementing the present invention.

As shown in FIG. 1, as an example for practicing the present invention, the entire system includes an oil supply pipe 10, a pressure gauge or a flow meter 20, and an oil leakage position estimating device 30. A database 40 for storing necessary data may be added and configured.

That is, the oil leakage position estimating apparatus 30 receives the measurement value in the oil supply pipe 10 through which the fluid 12, such as oil, flows from the pressure gauge or the flowmeter 20 provided in the oil supply pipe 10.

The oil pipeline 10 connects between the reservoirs 13 capable of storing the fluid 12 such as oil over a long section of several tens or hundreds of kilometers, and a pressurized station 14 at an intermediate point of the connected pipeline 10. ) To maintain the proper pressure drop over long sections. Here, the fluid such as oil 12 is any fluid that can flow like water other than oil. In addition, when the fluid is a fluid other than oil, terms related to oil such as an oil pipe, a low oil, and the like, which are described below, may be referred to by changing the term corresponding to the fluid. For example, when the fluid is water, the reservoir may be referred to as a reservoir and the oil pipe may be changed into a water pipe.

The pressure gauge or flow meter 20 is installed at two points of the oil pipe. The pressure gauges or flowmeters 21 and 22 at the point measure the pressure or the flow rates P _A and P _B and transmit them to the leak location estimating apparatus 30.

The oil leakage position estimating apparatus 30 stores the measured value transmitted in real time in the database 40. On the other hand, when the monitoring time interval for pressure or flow rate P is greater than 1 second, that is, 1 minute, 3 minutes, etc., the average value of all the pressure or flow rate P measured during that time period is used. . However, in order to reduce the measurement error, the average value may be excluded by excluding the maximum value, the minimum value, or the measurement value having a larger deviation than the other measurement values during the time. The oil leakage position estimating apparatus 30 estimates the oil leakage position using the obtained pressure or flow rate P information.

Since the estimation of the oil leakage position uses information on the pressure or the flow rate, it is possible to estimate both the case where the fluid 12 flows in the oil supply pipe 10 and the case where the fluid 12 does not flow. That is, when the fluid 12 is stopped, pressure is detected by using a pressure change. When the fluid 12 flows, it is detected whether or not the oil leakage by the change in the flow rate using a normal flow rate. However, even in the case where the fluid 12 flows, in a special case such as no flow meter is installed, the leak is detected using a change in pressure.

The database 40 is a storage for storing necessary data. The database 40 flows in the measurement information DB 41 for storing the measured value of the pressure or flow rate received from the pressure gauge or the flow meter, the transfer constant DB 42 for storing the transfer constant determined according to the density, and the oil pipe 10. It consists of a DB (43) for the position of each fluid type. However, the configuration of the database 40 is only a preferred embodiment, and in the development of a specific device, it may be configured in a different structure by a database construction theory in view of the ease and efficiency of access and search.

Next, a basic principle of estimating a leak location through the pressure or flow rate measured at two points in the leak location estimating apparatus 30 will be described with reference to FIG. 2. 2 is a view for explaining the principle of the leak location estimation method according to an embodiment of the present invention.

As shown in FIG. 2, it is assumed that leakage occurs at point C between two points A and B of the oil pipe. Assume that fluid 12 is flowing from point A to point B, and the distance between two points A and B is L.

If leakage occurs at point C, the pressure or flow rate decreases at point C. The pressure or flow rate drop at point C affects the environment, causing pressure or flow rate changes to propagate around point C. The speed at which the pressure or flow rate change at this time is referred to as a delivery speed of the fluid 12 in the oil pipe 10. The rate of delivery may vary depending on whether the flow of fluid 12 is forward or reverse. The forward speed in the forward direction is called v _F , and the forward pressure in the reverse direction is determined by v _R.

And it is assumed that the time that the pressure or flow rate change caused by leakage occurs at point C spreads to the pressure or flow rate change at point _A and t _B is the time when the pressure or flow rate change at point _B is t _B. That is, when leakage occurs at the point C, the pressure gauge or flow meter installed at the point _A after t _A time after the leakage occurs, the pressure or flow rate is measured, and the pressure gauge installed at the point B after the time t _B or The flow meter will measure the change in pressure. On the other hand, since the direction in which the pressure or flow rate is transmitted from the point C to the point A is opposite to the flow of the fluid 12, the speed at which the pressure or flow rate changes at the point A, that is, the transfer speed is v _R in the reverse direction. On the contrary, since the direction in which the pressure or flow rate is transmitted from the point C to the point B is the same direction as the flow of the fluid 12, the speed at which the change of the pressure or flow rate spreads at the point B, that is, the transfer speed is v _F in the forward direction.

On the other hand, to multiply the transfer rate v _R and the transit time t _A of the point A from the point C and a distance of L _A of the A and point C, the transfer speed v _F and the transit time t _B of the point A from the point C Multiplying results in L _B , the distance between A and C.

Therefore, the following two expressions can be derived.

Solving the above two equations with the system of equations for t _A gives the following equation.

이므로, 다음 [수학식 1]과 같다.Therefore, leak location X _C

Therefore, the following Equation 1].

However, since the flow rate is changed when the fluid flows, Equation 1 is a formula that uses the flow rate of the fluid.

On the other hand, if the fluid 12 is stopped, the delivery speed becomes v equal to the forward direction or the reverse direction. Therefore, when the fluid 12 is stopped, the leakage oil position X _C is represented by the following [Equation 2].

However, since the change of the pressure is used when the fluid is stopped, Equation 2 is a formula that uses the pressure of the fluid.

Next, a method of estimating a leak location using a difference in detection time between two points by a delivery constant for each oil type in an oil pipeline according to an embodiment of the present invention will be described with reference to FIG. 3. 3 is a flowchart illustrating a method of estimating a leak location using a difference in detection time between two points by a transfer constant for each oil type in the oil pipe.

As shown in Figure 3, the leakage location estimation method using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipe (a) receiving the transfer constant for each oil type (S10), (b) of the fluid in the oil pipe Estimate the location information for each oil type (S20), (c) detect the leakage by inputting the measured values from the pressure gauge or flowmeter installed at the two points (S30), (d) if leakage is detected at one point, the leakage detection time Recording and detecting leakage at another point (S40), (e) when leakage is detected at another point, the leakage position is estimated using the difference between the leakage detection time of the two points (S50).

Step (a) is a step of receiving a transfer constant for each oil type (S10). In particular, in the step (a), the type-specific transfer constant is a constant value to obtain the measured transfer rate of the pressure or flow rate of the fluid according to the density.

In order to calculate the leak location earlier, it is necessary to know the rate of transfer of pressure or flow rate changes. However, the transfer rate varies depending on the type of flow rate and the diameter. Therefore, the transfer constant determined according to the density of the fluid is obtained in advance and stored, and the stored transfer constant is used instead of the transfer rate. The transfer constant is set to a constant value according to the change of the density of the fluid. That is, an empirical formula for obtaining the transfer constant is used.

Step (b) is a step of estimating the position information for each type of fluid including the density and position of the fluid flowing in the oil pipe (S20). In particular, in the step (b), the density and the flow rate of the fluid 12 is continuously input from the density meter and the flow meter installed at the two points, the time difference between the time when the fluid 12 began to flow and the measurement time Calculate the flow rate that flows in and estimate the position of fluid flow in the pipeline according to the density.

The fluid flowing in the oil pipe 10 may be divided into several types (or oil types) in time. For example, at the oil supply point A, a fluid called K may be fed for 10 hours, followed immediately by a fluid called L for about 20 hours. At this time, when the time to deliver the oil from the entire point A to the point B is 10 hours, 5 hours after the start of flowing the fluid L after the fluid K, and the fluid of K and L in the oil pipe 10 half Will occupy. That is, it can be seen that the fluid L flows from the point A to the center of the pipeline and the fluid K flows from the center of the pipeline to the point B. In order to measure the fluid flowing in each part of the oil pipe 10, the flow rate at the point of change of the density value is accumulated over time by using the flow meter and the density meter at the oil feed point as a ratio of the total amount of the oil pipe in the sensing section. It is possible to estimate the quantity, distance, and density value for each oil type in the pipeline.

Moreover, the density of the said fluids K and L is also measured with the density meter of the said A point. Therefore, the leak location estimating apparatus 30 stores the fluid positional information for the estimated fluid distance and the density of the fluid measured by the density meter.

Step (c) is a step of detecting leakage by receiving a measurement value from the pressure gauge or the flow meter 20 installed at the two points (S30). In addition, in step (d), if leakage is detected at one of the points, the leakage is detected and the leakage is detected at another point (S40).

For example, as shown in Figure 4, by continuously monitoring the measurement of the pressure or flow rate it is possible to determine the difference in change in pressure or flow rate over time. Figure 4a is to detect the leakage through the change of the flow rate when the fluid flows, and to estimate the leakage location, Figure 4b is to detect the leakage through the change of pressure during stop and to estimate the leakage location.

Measurement values are continuously input from a pressure gauge or a flow meter installed at two points A and B of the oil pipe 10. As described above, the measurement value is continuously input at short intervals such as 1 second to detect a change in the measurement value and detect whether there is leakage. Various methods may be used to detect leakage. For example, the reference value is determined in advance, and when the measured value input from the pressure gauge or the flowmeter 20 is out of the reference value range compared to the previous measured value, it is detected as leakage. In order to reduce the error of the measured value, a value obtained by averaging the measured values input at short intervals such as 1 second for a predetermined time (for example, 3 minutes) may be used.

On the other hand, in the step (c) or (d), when the fluid is stopped in the oil pipe, the leak is detected by using the measurement value measured from the pressure gauge. That is, when the fluid is stopped, the leakage is mainly detected by the change of pressure measured from the pressure gauge, and the leak is detected mainly by the change of the flow rate measured by the flow meter while the fluid is flowing. However, in special cases, such as when no flow meter is installed, it can be detected using a change in pressure even if the fluid is flowing.

In the step (e), when leakage is detected at another point, the leakage location is estimated using the difference between the leakage detection time of the two points and the transfer constant for each oil type (S50).

When leakage is detected by a change in the measured value input from the pressure gauge or the flow meter 20 at any one point, the leakage detection time is recorded and the leakage is detected at another point. That is, the change of the measured value from the pressure gauge or the flowmeter 20 installed in another point is sensed. If leakage is also detected at other points, the difference between the leak detection times of the two points may be obtained to obtain the location of leakage through Equation 1 or Equation 2. However, instead of the transfer rate used at this time, the previously obtained transfer constant is used.

However, as shown in the definition of? T,? T is a value obtained by subtracting the leak detection time at the A point from the leak detection time at the B point. That is, if leak point C is closer to point A, leak will be detected first at point A, so △ t will have a positive value, but if leak point C is closer to point B, △ t will be negative ( Will have a value of-).

On the other hand, in step (e), if there is more than one oil type in the oil pipe, the transfer constant for each oil type is obtained at each position in the oil pipe, and the difference between the total transfer time and the oil leakage detection time obtained as the oil type transfer constant. The location where the difference is minimum is estimated as the leak location.

As seen earlier, the fluid in the pipeline can flow several kinds of fluids at the same time. For example, if the length of the entire pipeline is 100km, K fluid up to 30km, L fluid up to 30-50km, and M fluid up to 50-100km can flow simultaneously. If there are several oil varieties in the pipeline, the delivery constant for each oil type is obtained. This is because the transmission constant varies depending on the type of oil. And the position of the difference between the total transfer time and the leakage detection time obtained by the transfer constant for each oil type is estimated as the leakage location.

Next, an apparatus for estimating a leak location using a difference in detection time between two points by a delivery constant for each oil type in an oil pipeline according to an embodiment of the present invention will be described with reference to FIG. 5.

As shown in FIG. 5, the oil leakage position estimating apparatus 30 of the oil pipe includes a transmission constant input unit 31, a position information estimation unit 32, a measurement information input unit 33, an oil leakage detection unit 34, and an oil leakage position estimation unit. It comprises 35.

The transfer constant input unit 31 receives a transfer constant for each oil type. In particular, the transfer constant input unit 31 determines the transfer constant for each oil type to a constant value that can obtain the measured transfer rate of the pressure or flow rate of the fluid according to the density.

The positional information estimating unit 32 estimates the positional information for each oil type including the density and the position of the fluid flowing in the oil pipe. In particular, the position information estimating unit 32 continuously receives the density and flow rate of the fluid from the density meters and the flow meters installed at the two points, and calculates the difference between the time at which the fluid starts to flow and the measurement time and the flow rate. The calculation estimates the position of the fluid flow in the pipeline according to the density.

The measurement information input unit 33 receives measurement values from a pressure gauge or a flow meter installed at the two points.

The leakage detecting unit 34 detects leakage by the change of the input measurement value, and records the point and time at which leakage was detected. In particular, the leakage detection unit 34 detects leakage when the measurement value input from the pressure gauge or the flowmeter is out of the reference value range compared to the previous measurement value.

Preferably, the leak detection unit 34 detects the leak using the measurement value measured by the pressure gauge when the fluid is stopped in the oil supply pipe.

The oil leakage position estimating unit 35 estimates the oil leakage position by using the difference between the oil leakage detection time and the transfer constant for each oil type when oil leakage is detected at two points of the oil pipe.

Preferably, the position information estimating unit 32 calculates the leakage position X _{C according} to [Equation 1] when the fluid is flowing in the oil pipe. In addition, the positional information estimating unit 32 calculates the leakage position X _C by the following equation (2) when the fluid 12 is stopped in the oil supply pipe (10).

In addition, the position information estimator 32 obtains a transfer constant for each oil type according to each oil type at each position in the oil pipe, when there is at least one oil type in the oil pipe, and the difference between the total transfer time obtained as the oil transfer coefficient for each oil type and leakage The location where the difference in detection time is minimum is estimated as the leak location.

In the description of the leak location estimation apparatus using the difference in the detection time between the two points by the oil type transfer constant in the oil pipeline, the portion of the detection time between the points by the oil transfer coefficient by oil type in the oil pipe according to the present invention described above Refer to the explanation in the method of estimating leak location using the difference.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

The present invention can be applied to the field of leak detection system (LDS) that can detect leakage or oiling of oil pipe in real time and determine its location to take immediate action when leakage or oiling occurs. . In particular, the present invention can be applied to an apparatus and a method for detecting a location by detecting leaks or oils generated during a flow or stopping of a fluid such as oil or oil in an oil pipe.

1 is a diagram illustrating an overall leak detection and leak location estimation system for implementing the present invention.

2 is a view for explaining the principle of the leak location estimation method according to an embodiment of the present invention.

3 is a flowchart illustrating a method of estimating a leak location using a difference in detection time between two points by a delivery constant for each oil type in an oil pipe according to an embodiment of the present invention.

4 is a diagram illustrating detecting leakage according to a change in pressure or flow rate according to an embodiment of the present invention.

FIG. 5 is a block diagram illustrating a configuration of an apparatus for estimating an oil leakage position using a difference in detection time between two points due to a delivery constant for each oil type in an oil pipe according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: Oil Pipeline 11: Oiled Out Branch

12 fluid 13, 14 reservoir or pressurized station

20, 21, 22: pressure gauge 30: oil leakage position estimation device

31: transfer constant input unit 32: location information estimation unit

33: measurement information input unit 34: oil leakage detection unit

35: leak location estimation unit 40: database

41: measurement information DB 42: transfer constant DB

43: location information DB

Claims (15)

delete Oil leakage position estimation method using the difference in the detection time between two points by the transfer constant for each oil type in the oil pipeline by using the oil leakage position estimator that finds the oil leakage position by receiving the measured values from the pressure gauge or the flow meter installed at the two points in the oil pipeline. To (a) receiving a delivery constant for each oil type; (b) estimating position information for each oil species, including the density and the position of the fluid flowing in the oil pipe; (c) detecting leakage by receiving measurement values from pressure gauges or flow meters installed at the two points; (d) if leakage is detected at one of the points, recording the leakage detection time and detecting leakage at another point; (e) estimating the leak location using the difference between the leak detection times of the two points and the transfer constant for each oil type, if leakage is detected at different points; In step (a), The oil transfer position estimating method using the difference in the detection time between the two points by the oil transfer type constant in the oil pipe, characterized in that the constant value that can be obtained according to the density of the measured transfer rate of the pressure or flow rate of the fluid . The method of claim 2, wherein in step (b), The density and flow rate of the fluid are continuously input from the density meter and the flow meter installed at the two points, and the difference in time between the time point at which the fluid starts to flow and the time of measurement is calculated and the flow rate flows. A method for estimating a leak location using a difference in detection time between two points by a transfer constant for each oil type in an oil pipe, characterized by estimating a flowing location. According to claim 2, wherein step (c) or (d), Leak leakage position estimation method using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe, characterized in that if the measured value input from the pressure gauge or flow meter is out of the reference value range compared to the previous measurement value. According to claim 2, wherein step (c) or (d), When the fluid is stopped in the oil pipe, the oil leakage is detected using a measurement value measured from the pressure gauge using the difference in the detection time between the two points by the delivery constant for each oil type in the oil pipe. The method of claim 2, wherein step (e) When the fluid is flowing in the oil pipe, the oil leakage position X _C is calculated by [Equation 1] characterized in that the oil leakage position estimation method using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe. [Equation 1]

Where L is the distance between the two points, v _F , v _R are the forward and reverse transfer constants, [Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0. The method of claim 2, wherein step (e) When the fluid is stopped in the oil pipe, the oil leakage position X _C is calculated by [Equation 2] characterized in that the oil leakage position estimation method using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe. [Formula 2]

Where L is the distance between the two points, v is the transfer constant, [Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0. The method of claim 2, wherein step (e) When there is more than one oil type in the pipeline, the transfer constant for each type of oil is obtained at each position in the pipeline, and the difference between the total delivery time and leakage detection time obtained by the transfer constant for each oil species A method for estimating a leak location using a difference in detection time between two points by a transfer constant for each oil type in an oil pipe, characterized by estimating by. delete In the oil leakage position estimating apparatus using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe to find the oil leakage position by receiving the measured values from the pressure gauge or flow meter installed at the two points of the oil pipe, A transfer constant input unit for receiving a transfer constant for each type; A position information estimator for estimating position information for each oil type, including a density and a position of a fluid flowing in the oil pipe; A measurement information input unit for receiving measurement values from a pressure gauge or a flow meter installed at the two points; A leakage detection unit for detecting leakage by the change of the input measurement value, and recording a point and time at which leakage is detected; When leakage oil is detected at the two points of the oil pipe, the oil leakage position estimating unit for estimating the oil leakage position by using the difference between the oil leakage detection time of the two points and the oil type transfer constant, The transfer constant input unit, Leakage position estimation device using the difference in the detection time between two points by the transfer constant for each oil type in the oil pipe, characterized in that the transfer constant for each oil type is determined by a constant value that can be obtained by measuring the pressure or flow rate of the fluid according to the density . The method of claim 10, wherein the location information estimating unit, The density and flow rate of the fluid are continuously input from the density meter and the flow meter installed at the two points, and the difference in time between the time point at which the fluid starts to flow and the time of measurement is calculated and the flow rate flows. An apparatus for estimating a leak location using a difference in detection time between two points by a transfer constant for each oil type in an oil pipe, characterized by estimating a flowing position. The method of claim 10, wherein the oil leakage detecting unit, Leakage position estimation device using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe, characterized in that if the measured value input from the pressure gauge or flow meter is out of the reference value range than the previous measurement value. The method of claim 10, wherein the leak location estimation unit, When the fluid is flowing in the oil pipe, the oil leakage position X _C is calculated by [Equation 3] characterized in that the oil leakage position estimation apparatus using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe. [Equation 3]

Where L is the distance between the two points, v _F , v _R are the forward and reverse transfer constants, [Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0. The method of claim 10, wherein the leak location estimation unit, When the fluid is stopped in the oil pipe, the oil leakage position X _C is calculated by [Equation 4] characterized in that the oil leakage position estimation apparatus using the difference in the detection time between the two points by the transfer constant for each oil type in the oil pipe. [Equation 4]

Where L is the distance between the two points, v is the transfer constant, [Delta] t is the difference between the leak detection times of two points. If a point close to the oil-feeding point is detected earlier than a distant point, [Delta] t> 0, and later, [Delta] t <0. The oil leakage position estimating unit according to claim 10, When there is more than one oil type in the pipeline, the transfer constant for each type of oil is obtained at each position in the pipeline, and the difference between the total delivery time and leakage detection time obtained by the transfer constant for each oil species Leakage position estimation device using the difference in the detection time between the two points by the transfer constant for each oil type in the pipeline.

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