RU1800217C - Device for detecting pipeline leakage point - Google Patents

Abstract

SUMMARY OF THE INVENTION: A two-wire cable is laid along the entire length of the pipeline and a two-pole switch with two separate fixed positions is introduced. The input of the leak recorder is connected to the output of the switch, the pipe wall and one end of the resistance sensor are connected to its first input, the beginning of the first cable core is connected to the second input, the end is connected to the pipe end, and the beginning of the second cable cable, the end is connected with the end of the resistance sensor. At the output of the second input of the switch, a key is installed. 1 ill.

Description

The invention relates to heating systems. And can be used to protect pipelines from leaks.

The aim of the invention is to increase the accuracy of measurements and expand the functionality.

The drawing shows a basic block diagram of the device.

The pipeline 1, filled with an electrically conductive liquid 3, has a layer of thermal insulation 2. In parallel with the pipeline, a resistance sensor 5 and a two-core cable with a first core 6 and a second core 7. A measurement kit is installed at the pipeline inlet, containing a leak recorder 4, switch 9, two poles of which are connected to the pipeline 1 and resistance sensor 5, while the other are parallel to the first core of cable 6 and the second core of cable 7. A key 8 is installed for shorting the wires.

The device operates as follows. First, the resistance Fv ° lx.x is measured using the leak detector 4 at the first input of the switch 9. Then, the key 8 is closed and the leak detector 4 is repeated to measure the resistance R ° IK at the first input of the switch 9. Next, the measurements are compared with taking into account that the resistances of cores 6 and 7 are determined in advance. If there is no leak. which corresponds to non-damage of the pipeline 1 and damage to the thermal insulation layer 2, the condition fv ° Nxx R ik is fulfilled. If a leak is formed, then the resistance measurements fv 1x.x 1k. In this case, prior knowledge of the resistance Rik prior to the occurrence of the leak is fixed as R ° 4k. If a leak is detected, which corresponds to a decrease in resistance, x, then, with the key 8 open, leak detector 4 measures the resistance RII at the first input of switch 9 and the resistance R 2 at the second input of switch 9. Next, the distance to the leak point (first) is calculated from the formula:

 x,. Ri + R / O - C1). .

.. 2 (Rik CO) -. 2 Рж where I is the length of the pipeline;

 - resistance of one core.

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oh oh

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Next, it is necessary to repeat the cycle of measurements of the resistances R I I and due to the spreading of the liquid in the place of the leak. The new resistance values at the first and second inputs of the switch 9 are compared with the obtained values.

If the resistance changes at the first and second inputs of the switch are not the same, then this indicates a second leak. In this case, according to the fixed values of the obtained values of the resistances R (RP) 1, R (1) 2 and R (0) a, there is a place for the second leak.

Claims (1)

Claims A device for detecting a leak in a pipeline, including a leak detector, a resistance sensor along the pipeline, characterized in that, in order to increase the accuracy of measurements and expand the functionality, additionally along the entire length of the pipeline a two-core cable is laid and a two-pole switch with two separate fixed positions is introduced, and the input of the leak recorder is connected to the output of the switch, and to its first input the wall of the pipeline and one end of the resistance sensor are connected, and to the second input is the beginning of the first cable core, the end of which is connected to the end of the pipeline, and the beginning of the second cable core, the end of which connected to the end of the resistance sensor, and a key is installed at the output of the second input of the switch.