METHOD ESTABLISHING POINT AND DIMENSIONS OF LEAKAGE IN PIPE- LINE AND DEVICE FOR ITS REALIZATION

摘要

FIELD: pipe-line transport, location of point of leakage and evaluation of size, and damage to pressure pipe-lines difficult of access or technical supervision, specifically, in underwater pipe-lines and siphons. SUBSTANCE: in compliance with method two sensors placed along pipe- line receive acoustic signals caused by leakage noise, these acoustic signals are converted to electric signals and presence of indications of leakage acoustic signals is determined after amplification, filtration, storage and determination of mutual spectrum of electric signals by level of energy of mutual spectrum. Alarm signal is formed and point of leakage is located by time difference in arrival of acoustic signals to two sensors. Diameter of damage is evaluated by data on frequency of maximum of modulus of mutual spectrum, on velocity of flush effluent found on basis of information on pressure and density of media in pipe-line and environment, on velocity of flow of product through pipe-line. For pipe-lines of great extent proposed method is supplemented with reception of signals from acoustic sensors placed in parallel to pipe-line at distances d from one another which are found from mathematical dependencies given in formula of invention. In this case accumulation of results and mutual-spectrum analysis of signals are carried out between each pair of adjacent sensors continuously or episodically according to preset program. When alarm signal is received faulty section of pipe-line between pair of adjacent sensors signaling of presence of leakage is found prior to more precise location of point of leakage. Device determining parameters of leakage in pipe-line has n measurement channels. Each channel incorporates unit of acoustic converters, amplification unit and analog-to-digital converter connected in series and control unit. Output of amplification unit is connected to first input of filtration unit. Device is supplemented with n-channel information multiplexing unit, multiplex information transmission channel and information demultiplexing unit connected in series. In this case n inputs of n-channel information multiplexing unit are connected to corresponding outputs of n analog-to-digital converters. Device is also added with n-1 channel mutual spectra accumulation and analysis unit possessing n inputs and n-1 outputs. Each of n output physical channels of information demultiplexing unit is connected to proper input of n-1 channel mutual spectra accumulation and analysis unit. Device is supplemented with n-1 channel leakage detection unit, n-1 channel unit locating point of leakage, n-1 channel unit determining dimensions of leakage, n-1 channel unit establishing filtration band. Their inputs are connected in parallel with proper outputs of n-1 channel mutual spectra accumulation and analysis unit and output of n-1 channel unit establishing filtration band is connected to second inputs of filtration units. Device is added with unit forming alarm signal which input is connected to output of n-1 channel leakage detection unit, to output of n-1 channel unit locating point of leakage, to output of n-1 channel unit determining dimensions of leakage. Indicator of point and dimensions of leakage which input is connected to output of unit forming alarm signal is also made part of device. Unit controlling all control outputs and information inputs is connected to n channel information multiplexing unit, to information demultiplexing unit, n-1 channel mutual spectra accumulation and analysis unit, n-1 channel leakage detection unit, n-1 channel unit locating point of leakage, n-1 channel unit determining dimensions of leakage, n-1 channel unit establishing filtration band, unit forming alarm signal and indicator of point and dimension of leakage. EFFECT: increased noise immunity, high precision of location of point of leakage and evaluation of dimensions of damage in pipe-line. 3 cl, 2 dwg