Spark gap monitoring device in the protection circuit of contact network supports

Abstract

This utility model pertains to electrical engineering, specifically to means for monitoring the state of spark gaps and gas-discharge protective devices in overhead contact network support grounding circuits. The technical result is improved monitoring efficiency and effectiveness. A spark gap monitoring device for overhead contact network support protection circuits comprises a housing, an indicator, and a ferromagnetic steel bracket secured to the housing on one side with polyamide bolts and having openings on the other side for connecting elements. A plastic element with a flag-shaped indicator is mounted within the housing and rotates around an axis. A steel plate is secured to the plastic element, and the inner left side surface of the housing contains two protrusions for securing the indicator. The position of the plastic element and indicator after activation serves as a visual signal, recording the fact of a breakdown for timely maintenance of the overhead contact network support protection circuit.3 pages.

Description

[0001] The utility model relates to the field of electrical engineering, in particular to means for monitoring the state of spark gaps in protection circuits of contact network supports and gas-discharge protection devices on electrified railways with alternating and direct current.

[0002] A device is known for monitoring the state of a spark gap installed in the protection circuit of reinforced concrete supports of an overhead contact network (RU 69462 U1, B60M 5 / 00, G01R 27 / 18, published 27.12.2007, Bulletin No. 36), containing a sawtooth voltage generator connected to a power source, a visual voltage recording indicator, and a voltmeter connected to the generator output terminals.

[0003] The disadvantages of this device are low efficiency and high labor intensity of control, caused by significant time costs for the operator, since the testing procedure requires dismantling the spark gap from the protection circuit, which not only increases the overall duration of the work, but also takes the protection system out of operation during the testing period, reducing the overall reliability of the power supply system.

[0004] The closest technical solution to the claimed utility model is a spark gap monitoring system (RU 2769631, G01R 31 / 08, H02H 9 / 06, G06K 7 / 00, published 04.04.2022, Bulletin No. 10), comprising a housing, an indicator in the form of an RFID tag with a laminated adhesive backing, with an antenna, with chips, and a stationary or portable recording device.

[0005] The disadvantage of this technical solution is the low efficiency of spark gap monitoring in the protection circuit of contact network supports and the irreversibility of the state after a breakdown, since the RFID tag, which acts as a trip indicator, is destroyed after each breakdown and requires manual replacement, which leads to significant operating costs for new tags.

[0006] The objective of the utility model is to increase the efficiency and effectiveness of monitoring the state of spark gaps in the protection circuits of contact network supports.

[0007] The technical result is achieved in that the spark gap monitoring device in the protection circuit of the contact network supports contains a housing, an indicator, a bracket made of ferromagnetic steel, attached on one side to the housing using polyamide bolts and having openings on the other side for connecting elements, and a plastic element with an indicator in the form of a flag is installed in the housing with the possibility of rotation around an axis, and a steel plate is fixed to the plastic element, while the inner left side surface of the housing contains two protrusions for fixing the indicator.

[0008] The essence of the utility model is explained by drawings:

[0009] Fig. 1 shows a general view of the spark gap monitoring device in the protection circuit of the contact network supports;

[0010] Fig. 2 shows a side view of the spark gap monitoring device in the protection circuit of the contact network supports;

[0011] Fig. 3 shows a spark gap with a spark gap monitoring device installed on its rod in the protection circuit of the contact network supports.

[0012] The spark gap monitoring device in the protection circuit of contact network supports comprises a housing 1, an indicator 2, a bracket made of ferromagnetic steel 3, attached on one side to the housing using polyamide bolts 4 and having on the other side openings 5 ​​for connecting elements, and a plastic element 6 with an indicator 2 in the form of a flag is installed in the housing with the possibility of rotation around an axis, wherein a steel plate 7 is fixed on the plastic element 6, wherein the inner left side surface of the housing 1 contains two protrusions 8 for fixing the indicator 2.

[0013] The device works as follows:

[0014] When a monitored spark gap in the overhead contact support protection circuit is broken, a short-circuit current flows through the grounding conductor and spark gap rods. The resulting magnetic field acts on steel plate 7; the resulting force causes plastic element 6 to move, rotating around its axis. The position of plastic element 6 and the presence of indicator 2 in projections 8 after activation serves as a visual signal, recording the fact of a spark gap breakdown in the overhead contact support protection circuit.

[0015] The proposed utility model is intended for installation in grounding descents of contact network supports of electrified railways with alternating and direct current, in close proximity to spark gaps, or directly on their rods.

[0016] Compared to the prototype, the efficiency and effectiveness of monitoring the state of spark gaps in the protection circuit of contact network supports is increased, it becomes possible to conduct contactless diagnostics of the state of protective equipment without taking them out of operation, it is possible to completely eliminate the need for manual checks using special devices, which leads to the reliability of the contact network.

Claims

A spark gap monitoring device in a protection circuit for contact network supports, comprising a housing and an indicator, characterized in that it comprises a bracket made of ferromagnetic steel, attached on one side to the housing using polyamide bolts and having openings on the other side for connecting elements, and a plastic element with an indicator in the form of a flag is installed in the housing with the possibility of rotation around an axis, wherein a steel plate is secured to the plastic element, wherein the inner left side surface of the housing contains two protrusions for fixing the indicator.

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