RU166248U1 - DEVICE FOR FINDING DAMAGES OF EXTENDED ANODE GROUNDERS - Google Patents

Abstract

A device for searching for damage to extended anode grounding conductors, comprising an inductive sensor and a system of two measuring electrodes connected through a switch to an input amplifier, which is connected through a adapter to a two-channel signal receiver, the first channel of which operates at a frequency f <100 Hz, and the second channel, equipped with an integrator with an integration time of at least 3 s, operates at a frequency f less than 3/4 f; the signal receiver is equipped with a visual indicator, a data storage device and output to headphones.

Description

Device for searching damage to extended anode grounding conductors

The utility model relates to the field of electrochemical protection of underground pipelines and serves to localize the breakage sites of extended anode grounding conductors (hereinafter PAZ) in the cathodic protection systems of underground pipelines.

The known device vLocPro2 (vLocDM2) for determining the route, the depth and defects of the insulation coating of underground pipelines, the search for damage PAZ.

The device consists of a receiver-locator with a GPS module, a generator, an A-frame, inductive clamps and connecting wires.

The disadvantage of the vLocDM2 (vLocPro2) device is the low sensitivity and accuracy of measurements, the additional error of the GPS module. These shortcomings are caused by the fact that the device is adapted, but was not originally designed to perform specific measurements to localize PAZ damage.

The objective of the utility model is to create a device for searching for PAZ damage with the achievement of the following technical result: improving the accuracy of localization of PAZ breakage places.

The problem is solved in that the device for troubleshooting PAZ contains an inductive sensor and a system of two measuring electrodes connected through a switch to an input amplifier, which is connected via an adapter to a two-channel signal receiver, the first channel of which operates at a frequency f ₁ <100 Hz, for eliminating the influence of the magnetic field of the protected pipeline, the signal from which is an obstacle in determining the location of the PAZ, and the second channel, having an integrated integrator with an integration time of more than 3 s, operates at a frequency f ₂ less than 3/4 f ₁ ; while the signal receiver has a visual indicator, a data storage device and an output for headphones.

The figure shows a device as part of a complex for searching for damage PAZ.

The principle of operation of the device is based on measuring the EMF of an inductive transducer placed in an alternating magnetic field of a direct conductor, and the potential difference on the earth's surface along and perpendicular to the axis of the conductor.

The PAZ damage search complex contains a dual-frequency current generator 1; inductive sensor 2; system 3 of two measuring electrodes; switch 4; input amplifier 5; adapter 6; two-channel signal receiver, the first channel 7 of which operates at a frequency f ₁ <100 Hz, and the second channel 8 operates at a frequency f ₂ less than 3/4 f ₁ . At the same time, headphones 9 are connected to the receiver; visual indicator 10; a data storage device 11.

The device operates as follows.

To search for the PAZ path, the signal of the current generator 1 is used with a frequency of f ₁ <100 Hz. To localize the places of the PAZ breaks, the signal of the current generator 1 with a frequency of f ₂ <3 / 4f _{1 is used} . The signal current of the generator is detected by an inductive sensor 2 and a system 3 of two measuring electrodes. Switch 4 allows you to select a measurement method (search path or search for damage to the notch). Next, the signal through the input amplifier 5 and the adapter 6 enters, depending on the measurement mode, in one of the channels of the receiver. To determine the PAZ path, the first channel 7 of the receiver is used, operating at a frequency f ₁ <100 Hz. To search for PAZ damage, the second receiver channel 8 is used, operating at a frequency f _{2 of} less than 3/4 f ₁ , which has a built-in integrator with an integration time of more than 3 s. Sound indication of the signal occurs in the headphones 9. Visual monitoring of the signal is carried out on the display of the visual indicator 10. The recording of the measurement results takes place in the data storage device 11.

An increase in the sensitivity and accuracy of the location of PAZ breaks is achieved due to the fact that:

- measurements are made at frequencies less than 100 Hz;

- a digital two-channel receiver with selective signal amplification is used

at the frequencies of the generators, which allows you to adapt the receiver to the signal of the current generators;

- the second channel of the receiver, operating at a frequency f ₂ <3/4 f ₁ , is equipped with an integrator with an integration time of at least 3 seconds, which improves the accuracy of measurements;

- there is a greater electrode spacing (more than 7 m) than vLocPro2 (vLocDM2), which expands the measurement base.

Claims (1)

A device for searching for damage to extended anode grounding conductors, comprising an inductive sensor and a system of two measuring electrodes connected through a switch to an input amplifier, which is connected through a adapter to a two-channel signal receiver, the first channel of which operates at a frequency f ₁ <100 Hz, and the second channel equipped with an integrator with an integration time of at least 3 s, operates at a frequency f ₂ less than 3/4 f ₁ ; the signal receiver is equipped with a visual indicator, a data storage device and output to headphones.

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