A device for cleaning the barrel wall of a transformer on-load tap changer

Abstract

The invention provides a device for cleaning the barrel wall of a transformer on-load tap changer, comprising a hollow hand-held rod, a brush head is arranged at the front end of the hand-held rod, the brush head comprises a brush cloth and a hollow brush rod, an inner sleeve ring for fixing the brush cloth is arranged inside the front end of the brush rod, an anti-collision rubber pad is arranged at the front of the inner sleeve ring, a buckle for fixing the brush cloth is arranged at the rear end of the brush rod, an insulating buffer layer is arranged on the outer surface of the hand-held rod, and an oil pipe is arranged in the hand-held rod and the brush rod. The device has a hand-held rod that can be extended to the deep of the barrel wall for cleaning, and has an insulating buffer layer to avoid damaging the metal contacts in the barrel wall.

Description

Technical Field

[0001] The invention relates to a barrel wall cleaning device for an on-load tap changer of a transformer. Background Art

[0002] In the prior art, the known technology is that currently, the barrel wall of the transformer on-load disassembly switch is mainly cleaned by brushing or wiping with different brushes or soft cloths, and the residual oil is sucked out with an oil pipe, which has the following problems:

[0003] 1. The barrel wall of the on-load tap changer is deep, mostly over 70cm. The brush cannot reach the lower edge and bottom of the barrel wall, resulting in incomplete cleaning. 2. At present, if the brush cannot reach the lower edge for cleaning, the brush can be tied to the top of the insulating rod to lengthen the brush handle in disguise to facilitate cleaning. However, the insulating rod is made of hard fiberglass with a metal cap on the top. If it is not operated properly, it is easy to cause the metal contacts in the barrel wall of the on-load decomposition switch to be damaged. 3. When using an oil pipe to absorb residual oil, the residual oil is not completely absorbed. This is the deficiency of the existing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a transformer on-load tap changer barrel wall cleaning device to address the deficiencies in the prior art. The device has a hand-held rod that can extend deep into the barrel wall for cleaning, and has an insulating buffer layer to avoid damaging the metal contacts in the barrel wall.

[0005] The present scheme is achieved through the following technical measures: a device for cleaning the barrel wall of an on-load tap changer of a transformer, comprising a hollow hand-held rod, a brush head is arranged at the front end of the hand-held rod, the brush head comprises a brush cloth and a hollow brush rod, an inner sleeve ring for fixing the brush cloth is arranged inside the front end of the brush rod, an anti-collision rubber pad is arranged at the front of the inner sleeve ring, a buckle for fixing the brush cloth is arranged at the rear end of the brush rod, an insulating buffer layer is arranged on the outer surface of the hand-held rod, and oil pipes are arranged in the hand-held rod and the brush rod.

[0006] A threaded pipe is arranged at the rear end of the hand-held rod, the threaded pipe is communicated with the oil pipe, and the threaded pipe is communicated with an external oil drain pipe.

[0007] A travel switch is provided at the connection between the threaded pipe and the oil drain pipe, one end of the travel switch is connected to the negative electrode of the power supply, the other end of the travel switch is connected to the positive electrode of the power supply through a resistor R1, the sliding rheostat RB is connected in series with the resistor R1, the base of the transistor VT1 is connected to the negative electrode of the power supply through a resistor R2 and the travel switch, the base of the transistor VT1 is connected to the negative electrode of the power supply through a capacitor C1, the emitter of the transistor VT1 is connected to the negative electrode of the power supply, the collector of the transistor VT1 is connected to the positive electrode of the power supply through a resistor R3, the collector of the transistor VT1 is connected to the base of the transistor VT2, the base of the transistor VT1 is connected to the collector of the transistor VT2 through a resistor R4, the collector of the transistor VT2 is connected to the control electrode G of the thyristor VK through a resistor R5, the thyristor is connected in series with the alarm B and then connected in series with the power supply, and the alarm light L is connected in parallel with the alarm B.

[0008] The front end opening of the oil pipe is arranged in the middle of the anti-collision rubber pad, and a through hole passing through the oil pipe is arranged in the middle of the anti-collision rubber pad.

[0009] One end of the inner ring is provided with an annular protrusion, the height of the annular protrusion is the same as the thickness of the brush rod, the anti-collision rubber pad is fixed on the annular protrusion, and the front end of the anti-collision rubber pad is provided with a groove, which is communicated with the through hole.

[0010] The beneficial effects of this solution can be known from the description of the above solution. Since there is a hand-held rod in this solution that can be extended into the deeper barrel wall to clean the barrel wall, there is a brush head at the front end of the hand-held rod for cleaning; oil pipes are arranged in the hand-held rod and the brush rod, which is conducive to extracting the oil. There are an inner ring and a buckle on the brush head, so that the cotton cloth can be fixed to the brush rod through these two structures, which prevents the cotton cloth from falling off during cleaning and facilitates the replacement of the cotton cloth, avoiding the use of a disposable cleaning brush, and the two structures are one in front and one in the back, so that the two ends of the cotton cloth can be firmly fixed, so that the middle part of the cotton cloth will bulge, which is convenient for cleaning; the inner ring is inserted into the brush rod, which makes the fixation more secure, and the inner ring can be made into a cone shape, that is, the diameter of the end close to the anti-collision rubber pad is larger than the diameter of the end away from the anti-collision rubber pad, which is convenient for squeezing the cotton cloth, and an annular protrusion is provided at one end of the inner ring, so as to prevent the inner ring from being completely stuffed into the brush rod and difficult to take out, and such a structure is more conducive to clamping the cotton cloth, and the height of the annular protrusion is the same as the thickness of the brush rod, so that it is easy to use after installation; the front of the inner ring is provided with An anti-collision rubber pad is provided to prevent the front end of the brush rod from touching the barrel wall; a groove is provided at the front end of the anti-collision rubber pad, and the groove is connected to the through hole of the anti-collision rubber pad, so that it is convenient to remove the oil, and the groove can increase the absorption area, and it is also convenient to clean some concave and convex surfaces; an insulating buffer layer is provided on the surface of the hand-held rod to prevent the hand-held rod from damaging the metal contact of the barrel wall; a threaded pipe is provided at the rear end of the hand-held rod, so that it is convenient to connect the external oil drain pipe; during normal work, due to the need to clean different positions of the barrel wall, the end of the hand-held rod is easy to fall off the person's field of vision, so a travel switch is provided at the connection between the threaded pipe and the oil drain pipe, once the threaded pipe and the oil drain pipe are loosened or detached, the travel switch changes from a normally closed state to a disconnected state, and the alarm sounds an alarm, and the alarm light gives a light alarm to remind the staff. It can be seen that compared with the prior art, the present invention has outstanding substantial characteristics and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0012] Figure 2 It is a schematic diagram of the inner ring structure with an anti-collision rubber pad.

[0013] Figure 3 for Figure 2 Right view of .

[0014] Figure 4 This is the circuit diagram of the alarm circuit.

[0015] In the figure, 1 is a hand-held rod, 2 is a brush rod, 3 is an anti-collision rubber pad, 4 is a buckle, 5 is an insulating buffer layer, 6 is a threaded tube, 7 is a travel switch, 8 is a groove, 9 is an inner ring, 10 is an oil pipe, and 11 is a through hole. DETAILED DESCRIPTION

[0016] In order to clearly illustrate the technical features of the present solution, the present solution is described below through a specific implementation method and in conjunction with its accompanying drawings.

[0017] As can be seen from the accompanying drawings, a transformer on-load tap changer barrel wall cleaning device of the present scheme includes a hollow hand-held rod 1, a brush head is arranged at the front end of the hand-held rod 1, the brush head includes a brush cloth and a hollow brush rod 2, an inner sleeve ring 9 for fixing the brush cloth is arranged inside the front end of the brush rod 2, an anti-collision rubber pad 3 is arranged at the front part of the inner sleeve ring 9, a buckle 4 for fixing the brush cloth is arranged at the rear end of the brush rod 2, an insulating buffer layer 5 is arranged on the outer surface of the hand-held rod 1, and an oil pipe 10 is arranged in the hand-held rod 1 and the brush rod 2.

[0018] A threaded tube 6 is provided at the rear end of the hand-held rod 1 , and the threaded tube 6 is communicated with the oil pipe 10 , and the threaded tube 6 is communicated with an external oil drain pipe.

[0019] A travel switch 7 is provided at the connection between the threaded pipe 6 and the oil drain pipe. The travel switch 7 is connected to the alarm circuit. One end of the travel switch in the alarm circuit is connected to the negative electrode of the power supply, and the other end of the travel switch is connected to the positive electrode of the power supply through a resistor R1. The sliding rheostat RB is connected in series with the resistor R1. The base of the transistor VT1 is connected to the negative electrode of the power supply through a resistor R2 and the travel switch. The base of the transistor VT1 is connected to the negative electrode of the power supply through a capacitor C1. The emitter of the transistor VT1 is connected to the negative electrode of the power supply. The collector of the transistor VT1 is connected to the positive electrode of the power supply through a resistor R3. The collector of the transistor VT1 is connected to the base of the transistor VT2. The base of the transistor VT1 is connected to the collector of the transistor VT2 through a resistor R4. The collector of the transistor VT2 is connected to the control electrode G of the thyristor VK through a resistor R5. The thyristor is connected in series with the alarm B and then connected in series with the power supply. The alarm light L is connected in parallel with the alarm B.

[0020] The front end opening of the oil pipe 10 is arranged in the middle of the anti-collision rubber pad 3, and a through hole 11 is arranged in the middle of the anti-collision rubber pad 3 for passing the oil pipe. An annular protrusion is arranged at one end of the inner ring 9, and the height of the annular protrusion is the same as the thickness of the brush rod 2, and the anti-collision rubber pad 3 is fixed on the annular protrusion. A groove 8 is arranged at the front end of the anti-collision rubber pad 3, and the groove 8 is communicated with the through hole 11.

[0021] The present invention is not limited to the above-mentioned specific embodiments. Changes, modifications, additions or substitutions made by ordinary technicians in this field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for cleaning the barrel wall of a transformer on-load tap changer, characterized in that: It comprises a hollow hand-held rod (1), a brush head is arranged at the front end of the hand-held rod (1), the brush head comprises a brush cloth and a hollow brush rod (2), an inner sleeve ring (9) for fixing the brush cloth is arranged inside the front end of the brush rod (2), an anti-collision rubber pad (3) is arranged at the front of the inner sleeve ring (9), a buckle (4) for fixing the brush cloth is arranged at the rear end of the brush rod (2), an insulating buffer layer (5) is arranged on the outer surface of the hand-held rod (1), and an oil pipe (10) is arranged in the hand-held rod (1) and the brush rod (2); A threaded tube (6) is provided at the rear end of the hand-held rod (1), the threaded tube (6) being connected to an oil pipe (10), and the threaded tube (6) being connected to an external oil drain pipe; The front end opening of the oil pipe (10) is arranged in the middle of the anti-collision rubber pad (3), and a through hole (11) passing through the oil pipe (10) is arranged in the middle of the anti-collision rubber pad (3); A groove (8) is provided at the front end of the anti-collision rubber pad (3), and the groove (8) is communicated with the through hole (11).

2. The transformer on-load tap changer barrel wall cleaning device according to claim 1 is characterized in that: A travel switch (7) is provided at the connection between the threaded pipe (6) and the oil drain pipe, one end of the travel switch (7) is connected to the negative electrode of the power supply, the other end of the travel switch is connected to the positive electrode of the power supply through a resistor R1, the sliding rheostat RB is connected in series with the resistor R1, the base of the transistor VT1 is connected to the negative electrode of the power supply through the resistor R2 and the travel switch, the base of the transistor VT1 is connected to the negative electrode of the power supply through the capacitor C1, the emitter of the transistor VT1 is connected to the negative electrode of the power supply, the collector of the transistor VT1 is connected to the positive electrode of the power supply through the resistor R3, the collector of the transistor VT1 is connected to the base of the transistor VT2, the base of the transistor VT1 is connected to the collector of the transistor VT2 through the resistor R4, the collector of the transistor VT2 is connected to the control electrode G of the thyristor VK through the resistor R5, the thyristor is connected in series with the alarm B and then connected in series with the power supply, and the alarm light L is connected in parallel with the alarm B.

3. The transformer on-load tap changer barrel wall cleaning device according to claim 1 is characterized in that: An annular protrusion is provided at one end of the inner sleeve ring (9), the height of the annular protrusion is the same as the thickness of the brush rod (2), and the anti-collision rubber pad (3) is fixed on the annular protrusion.

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