RU33223U1 - Pipeline technical condition monitoring device - Google Patents

Description

The utility model relates to techniques for monitoring the technical condition

pipeline systems in areas of pressure oil and gas pipelines that are difficult to access and inaccessible to technical supervision, in particular in subsea pipelines and in siphons.

A device for determining the location of a leak from a pipeline as a source of acoustic radiation from US patent No. 4858462. This device contains two spaced acoustic sensors, two amplification and filtering units, two analog-to-digital converters and a computer with display facilities. This device does not provide vibration control and acoustic emission of pipeline defects.

Closest to the proposed device in technical essence is the "Device for determining the location and size of a leak in the pipeline according to the Russian certificate for utility model No. 23983.

The prototype device contains n measuring channels located from each other at distances at which the acoustic signal is detected from a leak in the pipeline; each channel contains a series-connected block of acoustic transducers, a gain block and a filtering block, the outputs of the n channels are connected to the inputs of the series-connected p-channel block of information compaction, a cable channel for transmitting information, a unit for decompression of information, a unit for processing information about leaks from the pipeline

This device does not provide vibration control and acoustic emission from pipeline defects.

The objective of the utility model is to improve the control of the technical condition of the pipeline as well as the timely determination of areas to be repaired. The technical effect in this case is the possibility of early determination of the occurrence of defects such as cracks, cross-corrosion, profile deformation by analyzing the acoustic emission caused by defects, as well as determining the places of abnormally high vibration.

To achieve this technical effect, a pipeline technical condition monitoring device containing n leakage detection channels, each of which contains an acoustic sensor connected to the input of the acoustic information pre-processing device, is made in the form of series-connected amplification unit, filtering unit, analog-to-digital converter unit, and block coordination, also containing a multiplex information transmission channel, the output of which is connected to the demultiplexer, connected to the acoustic information processing unit, while the acoustic sensors are installed on the pipeline at a distance d from each other, new features are introduced, namely, n vibration detection channels are introduced into it, each of which consists of a vibration sensor connected to the input of the pre-processing channel vibration information and n acoustic emission channels, each of which consists of an acoustic emission sensor connected to the input of the channel for preliminary processing of acoustic emission information, and having the structure of a channel for preliminary processing of acoustic information, each i-th acoustic sensor, i-th vibration sensor and i-th acoustic emission sensor installed in close proximity to each other are structurally combined with their channels of preliminary information processing i-th measuring post, the outputs of all n measuring posts are connected to the corresponding inputs of the multiplexor information channel, also

a vibratory information processing unit, an acoustic emission information processing unit, and a shipping monitoring unit are introduced, the inputs of which are connected to the corresponding outputs of the demultiplexer, while the input of the demultiplexer is connected to the output of the multiplex information transmission channel, and a display, adjustment, documentation, and control system (Sord and U ), the inputs of which are connected to the outputs of the acoustic information processing unit, the vibration information processing unit, the acoustic emission processing unit deformations of the block and monitor the shipping.

The essence of the utility model is illustrated in figure 1, which shows the block diagram of the proposed device.

The proposed device contains n channels for detecting leaks 1.1, 12, ..., 1.P, each of which contains an acoustic sensor, n channels for detecting vibrations 2.1, 2.2, ..., 2.p, each of which contains a vibration sensor, p acoustic emission detection channels, each of which contains an acoustic emission sensor 3.1, 3.2, ..., Zp, bottom posts 4.1, 4.2, ..., 4.p Each of the RF channels contains a block for processing preliminary information coming from the sensor (acoustic sensor, vibration sensor, or acoustic emission sensor, respectively), made in the form of a series-connected amplifier, filter, analog-to-digital converter, and a matching unit with a multiplex information transmission channel 5, which is connected in series with the demultiplexer 6. The device contains parallel-connected acoustic information processing unit 7, a vibration information processing unit and 8, the processing unit acoustic emission information 9, the unit 10 monitoring the navigation also comprises ARDS and 11 whose inputs are connected to outputs of 7,8,9,10 blocks. t Measuring posts 4 are installed on the pipeline 12. The operation of the device is as follows. Leak detection channels 1.1, 1.2, ..., 1.P each have an acoustic sensor made leakproof to the sound frequency range. They receive acoustic signals from a leak-jet, escaping from the pipeline through fistulas, cracks, as well as sonar noise of shipping. The vibration detection channels .2.1, 2.2, ..., 2.p have acoustic vibration sensors for the infrasonic and low sound frequency range. They are attached to the pipe 12 and receive vibration of the pipe. Acoustic emission channels 3.1, 3.2, ..., Z.p have acoustic emission sensors for the ultrasonic frequency range. They also attach directly to the pipeline and receive acoustic emission signals in the pipeline metal. The signals from the Noise leaks, noise of shipping, vibration and acoustic emission are converted into electrical signals, which in the equipment of the bottom posts 4.1, 4.2, ..., 4.P are amplified, filtered, sampled and fed to the multiplex information transmission channel 5, which is a functional a node that combines all input information streams into a single output stream, which is sent via cable to the demultiplexer 6, a functional node that splits into separate components of the information stream, according to radiated using a multiplexer.

In block 7 processing acoustic information, noise noise information | and the noise of shipping, signals are processed from each pair of acoustic receivers on channels 1.1 and 1.2, 1.2 and 1.3, ... 1. (p-1) and 1.p A cross-correlation (or cross-spectral) analysis is carried out, with the help of which the leak is located.

In the processing unit of vibration information 8, the vibration signal is matched to a predetermined threshold.

In the block of acoustic emission information 9, analysis and processing of acoustic emission signals in the ultrasonic frequency range is carried out.

In the block for monitoring shipping 10, information is processed for each group of three acoustic receivers via channels 1.1 + 1.2 + 1.3, 1.2 + 1.3 + 1.4, etc. For each pair of channels, the bearing for the noise of the vessel is determined and the coordinates of the vessel in the water area are determined by the triangulation method using two bearings.

The results of information processing in blocks 7,8,9,10 are displayed and documented in SORD and U 11, which synchronizes and controls the device.

Underwater equipment of the device: channels 1.1, ..., 1.p; channels 2.1, ..., 2.p, channels 3.1, ..., 3.p, bottom posts 4.1, ... 4.p, multiplex information transfer channel, are created from functional units known in technical hydroacoustics. The equipment of the coastal post: demultiplexer 6, blocks 7,8,9,10, SORD and U 11 are built on the basis of digital technology. ,

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Claims (1)

A device for monitoring the technical condition of the pipeline, containing n leakage detection channels, each of which contains an acoustic sensor connected to the input of the acoustic information pre-processing device, made in the form of series-connected amplification unit, filtering unit, analog-to-digital converter unit and matching unit, also containing multiplexed information transmission channel, the output of which is connected to a demultiplexer connected in series with the acoustic processing unit other information, while acoustic sensors are installed on the pipeline at a distance d from each other, characterized in that n vibration detection channels are introduced into it, each of which consists of a vibration sensor connected to the input of the channel for preliminary processing of vibration information and n channels of acoustic emission , each of which consists of an acoustic emission sensor connected to the input of the channel for preliminary processing of acoustic emission information having the structure of the channel for pre-processing aka statistical information, and each i-th acoustic sensor, i-th vibration sensor and i-th acoustic emission sensor, installed in close proximity to each other, are structurally combined with their information preprocessing channels and form the i-th measuring post, outputs all n measuring posts are connected to the corresponding inputs of the multiplexor information transmission channel, a vibration information processing unit, an acoustic emission information processing unit, and a shipping observation unit are also introduced the input of which is connected to the corresponding outputs of the demultiplexer, while the input of the demultiplexer is connected to the output of the multiplex information transmission channel, a display, adjustment, documentation and control system is also introduced, the inputs of which are connected to the outputs of the acoustic information processing unit, vibration information processing unit, processing unit acoustic emission information and a shipping monitoring unit.