CN112117142A - Quick belt cleaning device of transformer oil arc extinguishing on-load tap-changer contact mechanism - Google Patents

Abstract

The invention provides a quick cleaning device for a transformer oil arc extinguishing on-load tap-changer contact mechanism, which comprises a power execution unit, a control unit, an oil gun nozzle and an oil storage tank, wherein the power execution unit is used for providing power for transformer oil so that the transformer oil in the oil storage tank is conveyed to the oil gun nozzle for spraying, and the control unit is used for controlling the power execution unit. The quick cleaning device for the transformer oil arc extinguishing on-load tap-changer contact mechanism can complete flushing of the on-load tap-changer contact mechanism in a shorter time, can reach the cleaning standard, and reduces transformer oil loss.

Description

Transformer oil arc extinguishing on-load tap-changer contact mechanism quick cleaning device

technical field

The invention relates to the technical field of cleaning devices, in particular to a rapid cleaning device for a transformer oil arc extinguishing on-load tap-changer contact mechanism.

Background technique

At present, when the transformer on-load tap-changer is inspecting the hanging core, the contacts and accessories of the on-load tap-changer must be thoroughly cleaned with clean transformer oil, and the metal powder or oil stains attached to the contact surface must be washed away. On-site washing is often done by direct dumping of oil drums, which brings many problems such as long time, unclean washing, transformer oil splashing, wasting oil, and difficult to clean some locations. In recent years, the number of transformer tap-changer failures in the State Grid system has increased significantly and has a greater impact. In some cases, the main transformer tripping fault caused by the tap changer will also occur. Therefore, every aspect of the maintenance of the on-load tap changer should be carefully and accurately. If the metal powder generated during the switching process accumulates too much, it may lead to discharge. , heating and other serious defects, seriously affecting the safe operation of the main transformer equipment.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present application proposes a rapid cleaning device for the transformer oil arc extinguishing on-load tap-changer contact mechanism, so that the on-load tap-changer contact mechanism can be cleaned in a shorter time. flushing, and can meet cleanliness standards and reduce transformer oil loss.

In order to achieve the above purpose, the present application proposes a quick cleaning device for a transformer oil arc-extinguishing on-load tap-changer contact mechanism, which includes a power execution unit, a control unit, an oil gun nozzle and an oil storage tank. The power execution unit is used for The transformer oil provides power, so that the transformer oil in the oil storage tank is sent to the spray head of the oil gun for spraying, and the control unit is used for controlling the power execution unit.

In some embodiments, the power execution unit adopts a self-priming oil pump.

In some embodiments, a flow meter is provided on the connecting pipeline between the oil storage tank and the power executing unit, or on the connecting pipeline between the power executing unit and the spray head of the oil gun.

In some embodiments, the oil gun spray head adopts the way of matching an oil gun and a shower spray head.

In some embodiments, the control unit includes a start-stop switch, and a parallel circuit is led out from one phase of the three-phase alternating current through the start-stop switch, and one of the branches of the parallel circuit is the first switch and the second circuit. The coils of a relay are connected in series, the other branch of the parallel circuit is the second switch and the coils of the second relay are connected in series, the lead wire from the parallel circuit is connected to the neutral point through a fuse, and the three-phase alternating current is connected to the neutral point. The lead wire is connected to the self-priming oil pump through the normally open contact of the first relay, and the lead wire from the three-phase alternating current is also connected to the self-priming oil pump through the normally open contact of the second relay.

In some embodiments, one branch of the parallel circuit is the first switch, the normally closed contact of the second relay, and the coil of the first relay connected in series, and the other branch of the parallel circuit is the second switch , the normally closed contact of the first relay and the coil of the second relay are connected in series.

In some embodiments, the control unit further includes a third relay, the lead wire from another phase of the three-phase alternating current is connected to the neutral point through the coil of the third relay and the flow switch connected in series, and the constant voltage of the third relay is connected to the neutral point. The closed contact is arranged in the connection line between the three-phase alternating current and the normally open contact of the first relay, and in the connection line between the three-phase alternating current and the normally open contact of the second relay.

The beneficial effect of the solution of the present application is that the above-mentioned quick cleaning device for the transformer oil arc extinguishing on-load tap-changer contact mechanism can complete the flushing of the on-load tap-changer contact mechanism in a shorter time, and can reach the cleaning standard , reduce transformer oil loss.

Description of drawings

Figure 1 shows an electrical schematic diagram of the control unit in the embodiment.

Detailed ways

The specific embodiments of the present application will be further described below with reference to the accompanying drawings.

The transformer oil arc extinguishing on-load tap-changer contact mechanism quick cleaning device involved in the present application includes a power execution unit, a control unit, an oil gun nozzle and an oil storage tank. The transformer oil in the oil tank is sent to the spray head of the oil gun for spraying, and the control unit is used to control the power execution unit.

In this embodiment, the power execution unit adopts a self-priming oil pump, which has a short pumping time and better performance in terms of cost, volume, and easy operation; the control unit can realize the start and stop of the self-priming oil pump Some functions of control, forward and reverse control and other requirements, for example, on the connecting pipeline between the oil storage tank and the power execution unit, or on the connecting pipeline between the power execution unit and the oil gun nozzle The flow meter can count the amount of oil in each flush. Because the oil gun nozzle needs to spray in a large area, the oil gun nozzle adopts the combination of a long oil gun and a shower nozzle, which is convenient to achieve the optimal cleaning effect. The oil storage tank is a metal oil tank, which is better in terms of cost, service life, convenient application, etc. It provides transformer oil for the cleaning device, and its capacity is moderate, which is convenient for the device to pump oil.

As shown in FIG. 1 , the control unit includes a start-stop switch S, and a parallel circuit is drawn from one phase of the three-phase alternating current through the start-stop switch S, and one of the branches of the parallel circuit is the first switch KS1, the normally closed contact KM2-1 of the second relay KM2 and the coil of the first relay KM1 are connected in series, and the other branch of the parallel circuit is the normally closed contact KM1- of the second switch KS2 and the first relay KM1- 1 and the coils of the second relay KM2 are connected in series, and the wires drawn from the parallel circuit are connected to the neutral point N through the fuse FU, and the wires drawn from the three-phase alternating current are connected to the normally open contacts KM1-2 of the first relay KM1. To the self-priming oil pump, the lead wire from the three-phase alternating current is connected to the self-priming oil pump through the normally open contact KM2-2 of the second relay KM2. In order to prevent the device from idling, the control unit also includes a third relay KM3, the wire drawn from another phase of the three-phase alternating current is connected to the neutral point N through the coil of the third relay KM3 connected in series and the flow switch FE4. The normally closed contact KM3-1 of the relay KM3 is set in the connection line between the three-phase alternating current and the normally open contact KM1-2 of the first relay KM1, as well as the normally open contact between the three-phase alternating current and the second relay KM2. Point in the connection line between KM2-2.

The rotation mode of the self-priming oil pump is selected by the first switch KS1 and the second switch KS2. When the first switch KS1 is closed and the second switch KS2 is opened, the coil of the first relay KM1 is energized, and the first relay When the normally open contact KM1-2 of KM1 is closed, the self-priming oil pump is rotating forward, and the device is in the oil flushing cleaning mode; when the first switch KS1 is disconnected and the second switch KS2 is closed, the coil of the second relay KM2 When the power is turned on, the normally open contact KM2-2 of the second relay KM2 is closed, and the self-priming oil pump is reversed at this time, and the device is in the oil discharge mode. The flow switch FE4 is used to monitor the flow of the transformer oil in the pipeline. When the flow rate is 0, the flow switch FE4 is turned on, the third relay KM3 is energized, and its normally closed contact KM3-1 is disconnected, so that the device is powered off. , can protect the device and prevent the device from idling.

The transformer oil arc-extinguishing on-load tap-changer contact mechanism quick cleaning device involved in the present application can complete the flushing of the on-load tap-changer contact mechanism in a shorter time, and can reach the cleaning standard and reduce the loss of transformer oil. .

Claims (7)

1. A transformer oil arc extinguishing on-load tap-changer contact mechanism quick cleaning device, characterized in that: comprising a power execution unit, a control unit, an oil gun spray head and an oil storage tank, and the power execution unit is used to provide transformer oil. power, so that the transformer oil in the oil storage tank is sent to the spray head of the oil gun for spraying, and the control unit is used for controlling the power execution unit. 2 . The device for quick cleaning of the contact mechanism of the transformer oil arc extinguishing on-load tap-changer according to claim 1 , wherein the power execution unit adopts a self-priming oil pump. 3 . 3. The quick cleaning device for transformer oil arc extinguishing on-load tap-changer contact mechanism according to claim 1, characterized in that: on the connecting pipeline between the oil storage tank and the power execution unit, or on the power A flow meter is provided on the connecting pipeline between the execution unit and the nozzle of the oil gun. 4. The device for quick cleaning of the contact mechanism of transformer oil arc extinguishing on-load tap-changer according to claim 1, characterized in that: the oil gun nozzle adopts the mode of matching the oil gun and the shower nozzle. 5. The device for quick cleaning of the contact mechanism of the transformer oil arc extinguishing on-load tap-changer according to claim 2, wherein the control unit comprises a start-stop switch, and the lead wire from one phase of the three-phase alternating current passes through the After the start-stop switch, a parallel circuit is drawn. One of the branches of the parallel circuit is that the first switch and the coil of the first relay are connected in series, and the other branch of the parallel circuit is the second switch and the coil of the second relay. In series, the wire drawn from the parallel circuit is connected to the neutral point through the fuse, the wire drawn from the three-phase alternating current is connected to the self-priming oil pump through the normally open contact of the first relay, and the wire drawn from the three-phase alternating current is connected to the self-priming oil pump through the second The normally open contact of the relay is connected to the self-priming oil pump. 6. The quick cleaning device for transformer oil arc extinguishing on-load tap-changer contact mechanism according to claim 5, characterized in that: one of the branches of the parallel circuit is the normally closed contact of the first switch and the second relay The point and the coil of the first relay are connected in series, and another branch of the parallel circuit is that the second switch, the normally closed contact of the first relay and the coil of the second relay are connected in series. 7. The device for quick cleaning of the transformer oil arc extinguishing on-load tap-changer contact mechanism according to claim 5 or 6, wherein the control unit further comprises a third relay, which is drawn from another phase of the three-phase alternating current. The wire is connected to the neutral point through the coil of the third relay connected in series and the flow switch, and the normally closed contact of the third relay is arranged in the connection line between the three-phase alternating current and the normally open contact of the first relay, and In the connection line between the three-phase alternating current and the normally open contact of the second relay.

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