RU2739279C1 - Universal flaw detector for control of technical state of walls of sleeves - Google Patents

Abstract

FIELD: defectoscopy.SUBSTANCE: use for control of technical condition of sleeves surface. Essence of the invention lies in the fact that universal flaw detection device for monitoring the technical condition of the surface of the sleeves consists of arranged in the housing, interconnected by sealed cables and equipped with limiting cuffs and carriages of magnetic, ultrasound sections, with output for connection of industrial network or power unit with generator plant. It includes connected structure with magnetic and ultrasonic sections with connection to navigation and altitude-planned unit, which is element in flaw detector housing, inside which there is a navigation module, comprising a command device with a three-axis gyrostabilizer, with output to the digital computer system, and a recording equipment unit, and power unit is additionally equipped with buffer rechargeable storage battery, designed for uninterrupted monitoring, and automation unit, including relay groups, logic and protective devices, providing power supply to all components of flaw detector device for operation in normal mode.EFFECT: high information value, reliability of detected defects and accuracy of determining their location.1 cl, 2 dwg

Description

The invention relates to the field of monitoring the technical condition of products, measuring equipment and can be used to diagnose the condition of the surface of the walls of the sleeves.

The purpose of the present invention is to apply the method of non-destructive testing of the technical condition of sleeves, both new and used (spent) during technical inspections and repair of ammunition. The flaw detection device allows you to expand the diagnostic capabilities during control. It allows you to determine changes in comparison with the measurement of readings from a reference sample, to determine potentially dangerous defects in the liner wall, to identify areas of dangerous stress and deformation from external and internal influences and to determine the total stress state in any section along the entire length of the inspected liner, as well as to assess the reliability resource surfaces in general, such as longitudinal and transverse cracks, pits, dents, corrosion damage, loss of liner metal, etc.

A known method of ultrasonic testing of products and materials [1], which consists in the fact that scanning is performed by an ultrasonic transducer along the profile of the product, the amplitudes and coordinates of echo signals are recorded, the data is processed on a computer and two-dimensional ultrasonic images of the scanned surface areas are displayed on the display. At least three images, forming a group obtained by scanning, are summed up into one image. If there is a defect in it, all ultrasound images of this group are scanned "through sheets", according to which the size of the defect is estimated.

The disadvantage of this method is that it is based on determining the coordinates of the reflecting points of the defect. However, due to the specifics of the reflective properties of the defect associated with its geometric shape, the state of the product surface and the orientation of the defect, unreliable results of measuring the parameters of the defect can be obtained. The presence of surface damage to the product does not allow for stable input and reception of ultrasonic signals from the product surface. Insufficient acoustic contact and its stability in the process of scanning from rough surfaces, which does not allow, after detecting a defect, to estimate its actual dimensions.

Known technical solution [2], based on a thermoelectric method of non-destructive quality control of the surface layer of metal, in which forced heat treatment of the outer or inner surface of the inspected section of the wall of the pipeline under test is performed, causing an increase or decrease in the temperature of its outer surface, after which the outer surface of the checked pipeline is scanned optical system of the thermal imager. From the obtained thermograms, defects are determined that locally change the thickness of the pipeline wall, causing a local change in temperature in these places.

The disadvantage of this method is the low resolution and reliability of the image obtained from infrared radiation, the uncertainty of the location of the defect along the wall thickness and the impossibility of determining its volumetric configuration.

The known method of electromagnetic flaw detection, thickness measurement of multicolumn wells and 1 device for its implementation [3].

The known method is implemented using a device containing axial and transverse probes, which are previously divided into two groups.

An electromagnetic field is excited in steel casing strings by current pulses in the generator coils (GC) of the probes. Primary processing of signals of the secondary non-stationary electromagnetic field (VNEP) in the measuring coils (IR) of the probes is measured and carried out after switching off the current pulses in the GC.

For the second group of probes, the duration of the current pulses excited in the GK and the time for measuring the HNEP signal in the PC, respectively, are chosen at least three times shorter than the duration of the current pulses in the GK and the time for measuring the HNEP signal in the IR probes of the first group.

In addition, measurements of the HNEP signals in the IR probes of the first group are performed during the absence of current in the HA of the probes of both groups, and the excitation of current pulses in the HA and the measurement of the HNEP signal in the IR probes of the second group is performed during the passage of current pulses into the HA of the probes of the first group.

The disadvantage of this method is that the measured EMF at later times is influenced by the electromagnetic and geometric characteristics of the first column, which are measured with a certain error according to the data of the first group of probes. To determine the wall thickness of the second column, it is necessary to make corrections to take into account the error, which are not always set correctly.

The closest to the proposed technical solution is a flaw detector [4], taken as a prototype, consisting of three sections. The head section in it is an energy carrying battery for electric power supply of all devices. The power section is connected to the magnetic section. The magnetic section contains a computer for processing and storing measurement data. The magnetic section is connected to the ultrasonic section, which contains the ultrasonic generators and receivers. Known flaw detectors are based on magnetic and ultrasonic methods with a different number of sensors depending on the pipeline diameter being monitored. They do not allow detecting stresses and deformations from external and internal influences on the pipeline and determining the total stress state in any section along the entire length of the pipeline being inspected, as well as its position in space.

The disadvantage of this method is that it has a low accuracy in determining the defect by its geometric dimensions, the impossibility of determining the places exposed to corrosive effects, as well as the ability to determine the place of the greatest stress on the pipeline surface.

The aim of the present invention is to eliminate these disadvantages and determine the reliability resource of the liner as a whole, as well as to increase the information content, the reliability of the identified defects and the accuracy of determining their location.

This is achieved by the fact that in order to monitor the state of the surface of the sleeve in a universal flaw detection device (Fig. 1) containing located in a complex housing, interconnected by pressurized cables and delimited by cuffs and carriages of sections, which are connected to an industrial network or a generator set and brought to the recording equipment with visual display. The device for flaw detection (Fig. 1) is a sealed housing, inside which is placed a navigation module (1), which includes a command device with a three-axis gyro stabilizer, a digital computer complex (6, Fig. 2) and a block of recording equipment (7, Fig. 2). 2). And the energy component is additionally equipped with a rechargeable buffer battery, a functional sensor and an automation unit that includes relay groups, logical and protective devices that provide power to the flaw detector device in normal operation or only to the navigation and elevation marks section in emergency situations.

In the device of the flaw detector (Fig. 1), a damper (2) is located and fixed on the front end, behind it there are sections for flaw detection. The magnetic section (3) is designed to detect corrosion damage and erosive wear in the form of separate cavities, through holes, areas of corrosion from the outer and inner surfaces of the liner, and transverse cracks. It contains a system for magnetizing the metal of the pipeline wall with sensors, equipment for preliminary processing of information, and a block of recording equipment for recording information about detected defects (transverse cracks, corrosion and through defects in the pipeline).

The magnetic section (3) is connected to the ultrasonic section (4), which provides the detection of cracks of various orientations, corrosive locations, pores and other defects, as well as the measurement of the liner wall thickness. In the case of the ultrasonic section, there are piezoelectric transducers, equipment for preliminary processing of information and a block of recording equipment. They are connected to the navigation (1) and high-altitude-plan blocks (5), which is a sealed unit, inside of which are located: a navigation module, which includes a command device with a three-axis gyro stabilizer, and connected to a computer complex (6, Fig. 2), to which the registration unit is attached (7, Fig. 2).

The flaw detection device (Fig. 2) is connected to the holding rod (8), which in turn is connected to the computer complex (6). It connects to the power unit (9), which serves to provide power to the device. It houses a buffer battery, in the event of a power failure from the industrial network or from a generator set, an automation unit, a generator set and an autonomous signal and marker device. The automation block includes relay groups, logic and protective devices.

The flaw detection device (Fig. 2) works as follows. After installing the device in the controlled sleeve (10), power is supplied to the electric drives (11), which in turn give a rotational and linear movement along the movable table (12), it starts moving in the inner cavity of the sleeve (10). When advancing the flaw detection device (13), power is supplied to all elements. During the movement of the device, the magnetic and ultrasonic sections register surface defects, in particular, wall thicknesses, corrosion pits, and multi-oriented cracks. This information goes to the registration block of the corresponding sections. As the flaw detector passes through the signals of the command device, the navigation and high-altitude blocks performs a cyclic interrogation and receives information coming from the sensors to the computer, where the interaction of all devices is ensured in accordance with the algorithms of their operation, the data is compressed and transmitted to a memory device - a recording unit.

The power unit provides the necessary modes of power supply to the device in the process of flaw detection, carrying out the task of supplying power to all sections in normal operation. The main power supply is the industrial network, the backup power is the generator set. The buffer storage battery provides emergency power while organizing uninterrupted monitoring of the technical condition.

The power unit automation unit includes relay groups, logical and protective devices and, through appropriate connections, ensures uninterrupted power supply to the device sections in normal operation and power supply to the navigation and high-altitude planning unit.

After the passage of the flaw detection device in the controlled sleeve, it changes the control sample, at the same time processing the received information by an external computer complex.

The use of the proposal will make it possible to more efficiently carry out work on monitoring the technical condition of the liner walls to significantly expand the functionality

List of sources

1. Ultrasonic method of control of products and materials: RF patent / V.T. Pronyakin, M.Yu. Vasiliev, Yu.N. Panchenko. RU No. 99115325 A, publ. 20.05.2001. - 9 p.

2. Thermographic evaluation technigue: patent / Elton M. Crisman, Jr., Saint Cloud, Fla US No. 5292195, 1994. - 9 pp.

3. Method of electromagnetic flaw detection-thickness measurement of multicolumn wells and devices for its implementation: patent / A.A. Miller, A.V. Miller, S.V. Stepanov. RU No. 2468197, 2012. - 9 p.

4. Carrier of sensors of in-line ultrasonic flaw detector Patent FRG / Hartmut 6290 Weilburg De Goedecke DE No. 3626646, 1988. - 12 p.

Claims (1)

A universal flaw detection device for monitoring the technical condition of the surface of the sleeves, consisting of located in the housing, interconnected by pressurized cables and equipped with delimiting cuffs and carriages of magnetic, ultrasonic sections, with an outlet for connecting an industrial network or a power unit with a generator set, characterized in that it a coupled structure with magnetic and ultrasonic sections was introduced with a connection to a navigation and high-altitude planning unit, which is an element in the flaw detector housing, inside which a navigation module is located, including a command device with a three-axis gyro stabilizer, with output to a digital computer complex, and a recording equipment unit, and the power unit is additionally equipped with a buffer battery designed to organize uninterrupted monitoring, and an automation unit that includes relay groups, logical and protective devices that provide power to the f constituent elements of a flaw detection device for normal operation.

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