Device for detecting leakage

FIELD: protection or supervision pipelines.

SUBSTANCE: device comprises penetrable manifold (1) connected with pump (2) for fluid to be transported and with at least one pickup (4a) for material (M) leaked. Manifold (1) is provided with sources (7) of gas (G) to be detected, and each pickup (4a) is provided with gas pickup (4b).

EFFECT: enhanced accuracy of detecting leakage.

9 cl, 3 dwg

 

The invention relates to a device for detecting and locating leaks, containing permeable collector connected to a pump for the transport environment and at least one sensor for upcoming leakage substance.

Such a device is known from DE 2431907 C3 and used as system of detecting and locating leaks (LEOS), for example, in the pipeline (for example, gas or oil). If the material comes from a leak in the pipeline, it occurs due to the diffusion into the reservoir, and later together with the transport medium through the pump is delivered to the manifold to the sensor and detects there. By the time of transportation and the known flow rate then determine the leak location.

Increasing the length of the collector, which pipelines can be up to 800 km, the problem arises, namely, that because of the inevitable fluctuations in the density, pressure and temperature of gaseous transport medium along the manifold, and also because of the need to transport large pressure drop its speed of flow across the collector volatile and may fluctuate, so that the accuracy with which it can detect leaks, decreases with increasing length of the header.

The basis of the invention lies in the task of creating a device is to detect and locate leaks, which improves the accuracy of determining the location of leaks when the long header.

The task is solved according to the invention by a device with the characteristics of claim 1 of the formula. As manifold as markers at known locations and at a distance from each other given the sources detected gas, and the sensor facing substance spatial attached the sensor to the detected gas, the exact location of the leak is possible and then, when the flow velocity of the transport medium in the reservoir is unknown. On the contrary, it is sufficient that accurately known places, where the detected gas to flow into the collector. In the sensor coming maxima detected gas are then markers that relate to a specific location of the collector. If, for example, a maximum of substances occurs between the second and third peaks detected gas, it is clear that the substance has penetrated into the reservoir between the second and third sources detected gas. Because the locations of these sources are accurately documented, and, in addition, the distance from the peak of the substance to a neighboring maximum gas can conclude that the distance from the leak to the appropriate source location, achieves reliable determination of the location of the leak.

In principle, you can use Odie is the same sensor for detecting substances, and gas. In this case detective substance and the gas can be identical. Mostly, however, there is a detected gas, which does not correspond facing the leakage of the substance, and in one particularly preferred implementation is provided by the use of the sensor-facing substance, which does not register the gas. Due to this, it is possible to reliably and with high detection sensitivity to detect leaks that are in close proximity token.

In a particularly preferred embodiment, a sensor for emerging substances prevclose catalytic Converter for the conversion of hydrogen into the water, to which the sensor is immune. This ensures that the measuring signal recorded by the sensor coming out of the leak of the substance, the hydrogen does not interfere. For detection of the hydrogen are then own sensors.

In particular, macaroni are anodes cathodic protection, serving as a source of hydrogen. Such anodes cathodic protection placed on the pipe at precisely known locations to prevent corrosion of the pipeline. Anodes cathodic protection are usually made of aluminum, are in electrical contact with the pipeline and form with it a local member, to the negative pole (cathode), i.e. t is webpromote, formed hydrogen. Then he gets as detected gas in the reservoir at precisely known locations.

In an alternative form of execution tokens include a metal body consisting of a more noble metal than the anodes cathodic protection, and electrically connected with them. Thus, there is an independent local member. This ensures a constant and reliable formation of hydrogen at the anode cathodic protection or connected to the anode cathodic protection metal body laid under water collector.

Metal body acting as a cathode, electrically isolated from the anode, cathodic protection, for example, plastic and through the electric wires connected to the anode cathodic protection.

Mainly as a pump provides a pressure pump, which in the direction of flow is attached to the beginning collector. Compared with the use of a suction pump this has the advantage that along collector can be created a large pressure difference, which is many times higher than the attainable suction pump maximum pressure difference, so that the system can be used at a distance more than 15 km without the need to place each other multiple systems. In the collector due to the use of the ia injection pump may be created such a large pressure difference, even after a few hundred kilometers of the flow of the transport medium will be sufficient. Through the use of the injection pump can thereby be transported transport environment at a very great distance without the need for additional pumps. This makes possible the use of the pipeline laid under water for long distances (up to 800 km), as in this case, complex station pump is required only at the beginning or at the end of the header.

In another preferred form of execution of the collector is given a somewhat distant from each of the touch blocks for emergent matter and gas, all of which touch the blocks by means of electric pithouse measuring line connected to the processing unit at the end of the header.

Due to the fact that the collector is given a somewhat touch blocks is achieved the advantage that the diffusing substance is detected faster than would be possible with very long transportation until the end of the collector. In addition, after a very long transport substances it could be distributed over a longer segment of pipe than at the penetration that would hinder the detection. Individual sensory units require only one pithouse measuring line in order to transmit the measured values to the Central processing unit is the end of the collector. There each segment of the segment between the pump and the first sensor unit, between two adjacent sensor units or between the last sensor unit collector and an additional sensor unit in the processing unit can be considered separately.

The distance between the touch blocks may be 10-50 km, while the length of the entire manifold can be 400-800 km

Thanks to the device according to the invention achieves the advantage that known as such, the system for detecting and locating leaks (LEOS) can also be used at very large distances, for example up to 800 km, and the underwater pipeline.

Device for detecting and locating leaks is explained in more detail using the example of the drawing, which represent:

figure 1: the device according to the invention in a schematic General view;

2 and 3: other preferred execution in General.

Figure 1 shows equipped with multiple sensor units 4 collector 1 length of about 500 km is known as such a system to detect and locate leaks that goes from the pump 2, operating as a pressure pump, and ends the processing unit 3, which is the last sensor unit 4. Other sensory blocks of 4 on Russ is the right of each other attached to the manifold 1. Each sensor unit 4 includes a sensor 4A for upcoming leakage of the substance M In the case of adjacent and beneath the water together with sewer pipeline 5 from leaking 51 enters the substance M, it falls to the manifold 1, diffuses into it, is transported to the subsequent process of leveling together with flowing in the collector 1 transport and environment T to the next sensor unit 4 and is registered there. All sensor units 4 through electric pithouse measuring line 6 is connected to the processing unit 3, where then determine the leak location.

In order to calculate the leak was not required to consider the flow velocity in a very long reservoir 1, in well-known places are sources 7 detected gas G, in particular hydrogen, employees markers. They are examples of the implementation of the anodes 8 cathodic protection, which are usually laid under water pipeline 5. Around these anodes 8 cathodic protection produces hydrogen, which as detected gas G, as detective, coming out of the pipeline 5 substance M, falls into the collector 1 and the detected sensor unit 4. Each sensor unit 4 contains our own, attached to the sensor sensor 4A 4b for the detected gas, for example hydrogen sensor. In other words, each sensor 4 is for the substance M spatial attached to the sensor 4b for gas G. Because of the location of hydrogen sources, namely the location of the anodes 8 cathodic protection, are known, the position of the maximum opening of the leak of the substance M between two peaks of hydrogen can be concluded about the leak, not necessarily knowing the flow rate in the collector 1.

To improve employees markers anode 8 of the cathodic protection provided by the metal body 10 consisting of a more noble metal than the anodes 8 cathodic protection, electrically isolated from them by the plastic and through the electric wires connected to the anodes 8 cathodic protection. These metal body 10 is formed significantly more hydrogen than the anodes 8 cathodic protection.

In order for the sensors 4A to emerging substances M not interfere with the hydrogen, as measured by the sensors 4b, is provided upstream of the catalytic converters 9, converting the hydrogen in nemesius water.

Is achieved the advantage that leaks can be reliably measured are also very long available pipeline 5.

Figure 2 and 3 serve as the markers of sources 7 detected gas G can be located directly on the collector 1, and koltseobrazno around it, as shown in figure 3. These sources represent the vessel in which the liquid L, e.g. the measures hydrocarbon compound with a low vapor pressure, in particular ethanol or a mixture of ethanol and water, gaseous component G which diffuses into the reservoir 1. Alternatively, you can also use as liquid water and placed in the vessel base metal 12 (3), for example a wire of zinc. Formed then hydrogen is sufficient for its detection as a marker using the sensor 4b. Shown in figure 2 and 3 forms of execution no longer require the presence of water around the pipes 1 or controlled pipeline, as education is detected gas does not depend on the ambient manifold 1 or pipeline environment.

The reference list of items

1 - collector

2 - pump

3 - block processing

4A, b - sensor

5 - pipeline

6 - peteuse measuring line

7 - source

8 - anode cathodic protection

9 - catalytic Converter

10 - metal body

12 - metal

51 - leak

G - gas

M - matter

T - transport environment

L - liquid

1. Device for detecting and locating leaks, containing permeable collector (1)connected to a pump (2) for transport environment and at least one sensor (4A) facing the leakage of the substance (M), characterized in that the manifold (1) as markers at known locations and at a distance from each other when the Ana sources (7) detected gas (G), in this case, the sensor (4A) facing substance spatial attached sensor (4b) for gas (G).

2. The device according to claim 1, characterized in that the gas (G) does not match facing the leakage of the substance (M).

3. The device according to claim 2, characterized in that the gas (G) is hydrogen.

4. Device according to one of claims 1 to 3, characterized in that the sensor (4A) facing substance (M) is insensitive to gas (G).

5. The device according to claim 4, characterized in that the sensor (4A) facing substance (M) prevclose catalytic Converter (9) for the conversion of hydrogen into the water.

6. The device according to claim 4 or 5, characterized in that the sources (7) are provided located on the pipeline (5) anodes (8) cathodic protection.

7. The device according to claim 6, characterized in that the springs (7) are the metal body (10), which consist of a more noble metal than the anodes (8) cathodic protection, and electrically connected with them.

8. Device according to one of the preceding paragraphs, characterized in that the pump (2) as the pressure pump in the flow direction is connected with the beginning of the collector (1).

9. Device according to one of the preceding paragraphs, characterized in that the reservoir (1) is given a somewhat distant from each of the touch blocks (4) for opening the substance (M) and gas (G), all of the touch blocks (4) through electrical is Oh pithouse measuring line (6) connected to the unit (3) processing at the end of the collector (1).

10. The device according to claim 9, characterized in that each sensor unit (4) includes a sensor (4A) facing substance (M) and sensors (4b) for gas (G).



 

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FIELD: protection or supervision pipelines.

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EFFECT: enhanced accuracy of detecting leakage.

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SUBSTANCE: the invention is pertaining to pipeline transportation, in particular, to transportation of oil and oil processing products by pipelines. The method of detection of the of the cleaning devices being transported inside pipelines and the interfaces of the oil products there includes a periodic emission of a probing acoustic pulse signal into a controlled section of the pipeline, reception of the reflected acoustic signals from the controlled section of the pipeline, conversion of the received acoustic signals into electrical signals, formation of a useful signal, measuring and storing of its amplitude, measuring after each emission of the probing signal of the probing time. If at that the amplitude of the useful signal exceeds the first threshold level, then conduct storing of the time of the probing, calculate using M last stored values of the probing time its average value, conduct a sample out of L last values of which and also store, after each measurement of a probing time conduct deduction from L-th average value of the probing time of the first value of sampling and if the modulus of the difference exceeds the defined value, then form and give a signal indicating the start of a fresh consignment of petroleum. The technical result of the invention is that the method allows to expand functionalities of the detection devices used to realize the method, in particular, in addition to detect interfaces of the lots of petroleum, which are transported in one pipeline without use of the separating devices.

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