SU1308905A1 - Device for contactless measuring of currents in underground main pipelines - Google Patents

Abstract

A device for contactless measurement of currents in underground pipelines is intended for electromagnetic surveys to clarify the location and depth of the pipeline, assess its insulation coating and contactlessly monitor the operation of cathodic protection stations by reproducing the current distribution pattern along the monitored highway. The device contains one-component magnetic field sensors in the form of frames 1-3 connected by a rigid base 4, with frames 2 and 3 mutually orthogonal, and the normals of the plane of frames 1 and 2 are directed along base 4, amplifier 5, amplitude detector 6, dial gauge 7 and dividing block 8 with 9 distance indicator. The device has a high accuracy of measurement in a wide range of measurement of the distance from the sensor to the axis of the pipeline. 2 Il. (O (L 0 8 0 CO O 00 co o ate

Description

FIG. one

113089052

The invention relates to an electric current flowing through a pipeline, a measuring technique, and more specifically to this, periodically stopping contactless current meters in use, the operator moves the base from the earthly main pipelines, and is intended for use according to the maximum indication of the electromagnetic surveys of the cat 7, it sets the sensor 1 in to determine the position of the azimuth direction relative to the laying depth of the pipeline, but the axis t uboprovoda, it determines ET state estimation tsionnogos position it isolates the pipeline. Purpose-based and non-contact control JQ To hold the base horizontally in cathode protection stations (RMS) direction, although (FIG. 2), it can be held and inclined at any current limit along the controlled side in a perpendicular pipe water plane. The position of the axis is current. The purpose of the invention is to increase; the f5 wire can be more accurately determined.

improvement of measurement accuracy in the wider minimum (between two max. range of distance) of the vertical field component,

from the sensor to the axis of the pipeline, adl which is necessary to position the base 4 with

also the expansion of functional airplanes vertically and, moving

the device capabilities, consisting of 20 across the path, find the minimum of the waveguide determining not only the current, the protector from the measuring sensor 1.

piping along the pipeline, but also the position of the laying depth of the pipeline for the axis (route) and sensor removal. It is divided by the indicator 9 of the pipeline pitch.th block 8 when the base is located

Figure 1 shows the functional-25 parallel to the surface of the soil, and

on the scheme of the proposed device; sensor 1 - above the axis of the pipeline in

figure 2 - the location of the sensors in the azimuth direction. Wherein

with respect to the pipeline. . (Figure 2) true ratio

The structure of the device (Fig. 1) includes three solid-component sensors of the magnetic field in the form of frames 1–3, connected in a fixed base 4, amplifier 5,

amplitude detector 6, arrow where B is the length of base 4; The indicator 7 and the dividing block 8c H2 and H are components of the intensity indicator 9 distance. The sensors of the alternating magnet field are in the form of flat frameworks of the aforementioned floor, they are accepted, and the frames 2 and 3 of the mutually or-go frames 2 and 3 are correspondingly angular, with aligned centrally.

and the same in area and quantity. Therefore, the indicator is 9 ratios, and the normals of the plane of the frames 1 defined by Dividing unit 2 (the axes of their maximum sensitivity 8) show the depth value in

) are directed along base 4, i.e. units B. The magnitude of the current I, which is opposite to the straight line connecting their centers along the pipeline, determines the base and the normals of all three frames with the formula are in the plane perpendicular to 45n

pipeline axes. I 2 // hH; I 2) (B --- H,

The device works as follows:

at a time, where H is a full vector module eg Sensors 1-3 and amplifier 5 for adjusting the magnetic field are measured at the frequency of the measured current 50 measured current I, which (for the second harmonic of the network voltage is sensed by the sensor 1. RMS operation) or Calibration of the current meter (indicated by the frequency of the generator connected to the catcher 7) can be made directly with its output terminals to the tube in amperes. This is followed by a wire and ground connection. The operator with the 55 located the main measuring device moves along the sensor 1 at a distance h B from the pipeline axis and using the dial gauge-linear current given by the generator 7 monitors the change in voltage. To reduce the error in the effectivity of the magnetic field created by the abortions, associated with the geometry of the device31308905

It is desirable to select the length of the base B (FIG. 2), which is comparable with the removal of the sensor 1 from the axis of the pipeline h.

Practical operation of the proposed device involves movement along the pipeline in such a way that the first sensor is located around the axis in the azimuthal direction (which the operator himself can control by maximum-fO marani currents in the underground mainline deviation of the arrow from the primary pipelines the indicator 7 for the oscillatory and the second one-component sensors of the paramats of the sensor parrot route). Magnetic field, coherent distance of the sensor 1 from the axis of the pipeline between them and located in the plane when this is read from the indicator-f5, the bones of the perpendicular pipe 9 of the separator block 8. Perforation also connects the indications of both indicators 7 and with a dual sensor amplifier, the amplitude 9 gives the value of the measured current. This data collector and indicator, which is used to lure the device, allows you to increase the productivity and information content of the work in electromagnetic surveys of main pipelines.

Claims (1)

Formula of the Invention Device for contactless revealing that. By varying the value of h (Fig. 2), it is possible to achieve some desired value by 20 to show the accuracy of the NIN measurement of the value of the ratio, showing and rubbing up the functional capabilities of the indicator 9. Then the indicator shows, it additionally contains a torus 7 that shows directly A single component companion sensor is the magnitude of the measurable current in a suspended floor located orthographic units. 25nally to the pipeline and the second sensor — the device was damaged and formed a two-component distortion along the pipeline system, and a dividing unit with a mixed component of the second straight-line indicator, and the axis of the sensing pulsating current of the cathode-vitality stations of the second and second sensor protection allows judging that only 30k are parallel to each other and the directions of the currents in underground pipelines are shared by the first and second single-component magnetic field sensors between each other and located in a plane perpendicular to the pipeline and also sequentially connected to the amplifier with a pair sensor, amplitude data generator and indicator, the luring of the previously deployed device allows to increase the productivity and informativity of work during electromagnetic surveys of trunk pipelines. Formula of the Invention Device for contactless revealing that. The goal is to measure and crush functional airways, it additionally contains a single component sensor field located orthogonal to the pipeline and the second board and forming a two-component system with it, and a dividing unit with a second indicator, and the vitality axis of the second and second tracks are parallel each other and on about the condition of the insulation coating of the pipeline, but also to draw conclusions about the effectiveness of the anticorrosion protection in various sections of the pipeline. one Editor L.Gratillo Phage. 2 Compiled by O.Raevska Tehred M.Hodanich along the connecting base, and the outputs of the second and third sensors are connected respectively to the inputs of the divider and the divisible dividing unit. Corractor L. Patay 1792/35 Circulation 731 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk Ha6.i 4/5 Production and printing company, Uzhgorod, st. Project, 4