CN216928258U - Special supporting insulating device of 220kV transformer 10kV side outlet wire sleeve - Google Patents

Abstract

The invention discloses a special matching insulating device for a 10kV side outlet bushing of a 220kV transformer, comprising: an insulating cover (1) with a hat-type structure and an insulating device fitting (6) that is plug-and-connected with the insulating cover (1); The upper half of the insulating cover (1) is an insulating cover main body (2) with a cylindrical structure, and the side wall of the insulating cover main body (2) is provided with a first test hole (4) and a second test hole that pass through (5), the lower half of the insulating cover main body (2) is an insulating cover shed (3) with an umbrella-like structure; the insulating device accessories (6) include an accessory main board (7), and the accessory main board (7) ) is provided with a first plug (8) and a second plug (9). The invention can be installed on the conductive rod of the 10kV side bushing in a rotating way, which perfectly realizes the insulation and sealing treatment of the bushing; at the same time, when the conductor needs to be exposed during the power outage maintenance test of the transformer, it has the convenient advantage of not needing to disassemble and assemble the device, Significantly improve work efficiency.

Description

Special supporting insulation device for 10kV side outlet bushing of 220kV transformer

technical field

The invention relates to the field of insulation devices for transformer outlet bushings, in particular to a special matching insulation device for 10kV side outlet bushings of 220kV transformers.

Background technique

At present, most of the 220kV transformers on the 10kV side of the 220kV power grid in Dalian, Liaoning Province have no load, that is, there are only three outgoing line bushings and terminals on the 10kV side, and no outgoing busbars are connected. The processing methods of the outgoing bushing terminals are all insulated, the a-phase and c-phase are suspended, and the b-phase is reliably grounded. The treatment methods are mainly divided into two types: installing an insulating cover on the copper bar of the outgoing terminal; wrapping and sealing the exposed part of the copper bar of the outgoing terminal with insulating tape.

Both of the above two processing methods have certain defects. The insulating cover used in the first method has design defects. When the size design is unreasonable, the insulating buckle is used to fix the device, which makes the insulating cover easy to fall off, and there is a large gap after installation. Strength is not guaranteed. As a result, the 10kV side of the transformer is easily affected by bad weather, small animals, etc. during the operation process, resulting in a short circuit at the two-phase or three-phase outlet of the transformer, which poses a great threat to the safe and stable operation of the transformer and the entire power grid. Although the second treatment method ensures the sealing and insulation strength, it is a one-time application, and the installation and disassembly are very cumbersome, which consumes manpower and material resources and affects the operation efficiency. Therefore, there is a great need for a device that is convenient and quick to load and unload, and at the same time can ensure good insulation and airtightness, so as to meet the needs of the operation and maintenance test of the 10kV side bushing of the transformer.

SUMMARY OF THE INVENTION

Aiming at the above problems, the present invention provides a transformer 10kV side bushing insulation device with convenient loading and unloading, good insulation performance and tightness, which can safely and reliably ensure that the operation of the transformer 10kV side is not affected by external factors, and at the same time effectively improves maintenance. Test efficiency.

In order to achieve the above purpose, the present invention provides a special matching insulating device for the 10kV side outlet bushing of a 220kV transformer, the insulating device includes: an insulating cover with a hat-type structure and an insulating device accessory that is inserted and connected to the insulating cover;

The upper half of the insulating cover is an insulating cover main body with a cylindrical structure, the side wall of the insulating cover main body is provided with a first test hole and a second test hole that pass through, and the lower half of the insulating cover main body is an umbrella Insulation cover umbrella skirt of like structure;

The insulating device accessory includes an accessory mainboard, and a side of the accessory mainboard is provided with a first plug connected to the first test hole and a second plug connected to the second test hole.

In a preferred manner, the insulating cover is made of elastic silicone rubber.

In a preferred manner, the insulating device accessories include two sets of accessories with different materials, one is PVC material accessories used for insulating and sealing the insulating device during the normal operation of the transformer, and the other is used for the transformer during power outage maintenance. Brass fittings for service testing.

In a preferred manner, the interior of the insulating cover body is a funnel-shaped hollow structure with internal threads.

In a preferred manner, the interior of the insulating cover shed is an umbrella-shaped hollow structure, and the tail end of the shed of the insulating cover shed adopts an inner wrapping structure.

The beneficial effects of the present invention are as follows: the present invention is applied to the 10kV side where the 220kV three-winding transformer currently connected to the network is not put into use, and the insulating device of the present invention is installed so that the exposed conductor part has reliable dielectric strength and sealing, and reduces the Risk of short circuit at the outlet of the 10kV side of the transformer.

Description of drawings

1 is a schematic structural diagram of an insulating cover of the present invention;

Fig. 2 is the front view of the insulating device fitting of the present invention;

Fig. 3 is the left side view of the insulating device fitting of the present invention;

Fig. 4 is the top view of the insulating device fitting of the present invention;

FIG. 5 is a schematic diagram of the installation of the insulating device of the present invention.

In the figure: 1. Insulation cover, 2. Main body of insulation cover, 3. Insulation cover shed, 4. First test hole, 5. Second test hole, 6. Insulation device accessories, 7. Main board of accessories, 8. First Plug, 9, the second plug.

Detailed ways

Specific examples:

Referring to Figures 1-4, the present invention discloses a new 220kV transformer 10kV side outlet bushing which is convenient for disassembly and assembly, high in insulation strength, good in airtightness, and can complete routine tests on the transformer without disassembly during power outage maintenance. A matching insulating device for pipes, which includes: an insulating cover 1 with a cap-type structure and an insulating device fitting 6 that is inserted and connected to the insulating cover 1;

The upper half of the insulating cover 1 is an insulating cover main body 2 with a cylindrical structure. The side wall of the insulating cover main body 2 is provided with a first test hole 4 and a second test hole 5 that pass through. The insulating cover main body 2 The lower part of the shed is an insulating cover shed 3 with an umbrella-like structure.

As shown in FIGS. 2-4 , the insulating device accessory 6 includes an accessory mainboard 7 , and a side of the accessory mainboard 7 is provided with a first plug 8 that is inserted and connected to the first test hole 4 , and a first plug 8 connected to the second test hole 4 . The test hole 5 is inserted into the connected second plug 9 .

The insulating cover 1 is made of elastic silicone rubber, which has good insulating properties, anti-aging properties and certain flexibility.

The insulating device accessories 6 include two sets of accessories with different materials, one is PVC material accessories used for insulating and sealing the insulating device during normal operation of the transformer, and the other is used for maintenance without disassembling the device during power outages. Copper fittings for overhaul testing of transformers.

As shown in FIG. 1 , the inside of the insulating cover main body 2 is a funnel-shaped hollow structure with internal threads, which is used to fit the conductive rod parts of the casing with different diameters.

As shown in FIG. 1 , the inside of the insulating cover shed 3 is an umbrella-shaped hollow structure, and the end of the shed of the insulating cover shed 3 adopts an inner wrapping structure, which is used to realize the fit with the porcelain skirt of the casing to ensure that The sealing performance of the device.

When in use, remove the upper wiring board and fasteners of the 10kV side bushing of the transformer, and screw the insulating device of the present invention to the conductive rod of the bushing. Wipe the porcelain skirt of the casing clean to ensure that the bottom of the insulating device and the porcelain skirt are reliably fitted. When the transformer is running, put the PVC insulating device fittings 6 into the first test hole 4 and the second test hole 5 of the insulating cover 1. At this time, the whole set of the device completely insulates the bushing from the outside, which can ensure that the transformer is in operation. Phase-to-phase short circuit will not occur on the 10kV side. When the transformer is outaged for maintenance, take out the PVC insulating device fittings 6, and place the copper insulating device fittings 6 at the first test hole 4 and the second test hole 5 of the insulating cover 1 and fasten them inwards, if necessary. At this time, the conductive paste can be applied to the copper insulating device fitting 6. At this time, the copper plate outside the copper insulating device fitting 6 is connected with the conductive rod of the transformer 10kV side bushing, and the transformer DC resistance, winding deformation, dielectric Routine test items related to loss, etc. are shown in Figure 5.

The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (5)

1. The utility model provides a special supporting insulator arrangement of 220kV transformer 10kV side outgoing line sleeve pipe which characterized in that, insulator arrangement includes: the insulation device comprises an insulation cover (1) with a cap structure and an insulation device accessory (6) which is inserted and connected with the insulation cover (1);

the upper half part of the insulating cover (1) is an insulating cover main body (2) with a cylindrical structure, a first test hole (4) and a second test hole (5) which are communicated are formed in the side wall of the insulating cover main body (2), and the lower half part of the insulating cover main body (2) is an insulating cover umbrella skirt (3) with an umbrella-shaped structure;

the insulating device accessory (6) comprises an accessory main board (7), wherein a first plug (8) connected with the first test hole (4) in an inserting mode and a second plug (9) connected with the second test hole (5) in an inserting mode are arranged on the side face of the accessory main board (7).

2. The special matching insulation device for the 10kV side outgoing line sleeve of the 220kV transformer according to claim 1, wherein the insulation cover (1) is made of elastic silicon rubber.

3. The special matched insulating device for the 220kV transformer 10kV side outgoing line sleeve according to claim 1, wherein the insulating device accessories (6) comprise two groups of accessories made of different materials, one group is PVC (polyvinyl chloride) accessories used for insulating and sealing the insulating device during normal operation of a transformer, and the other group is copper accessories used for maintenance tests on the transformer during power failure maintenance.

4. The special matching insulation device for the 10kV side outgoing line sleeve of the 220kV transformer according to claim 1, wherein the insulation cover main body (2) is of a funnel-shaped hollow structure with internal threads.

5. The special matching insulation device for the 10kV side outgoing line sleeve of the 220kV transformer according to claim 1, wherein the inside of the umbrella skirt (3) of the insulation cover is of an umbrella-shaped hollow structure, and the tail end of the umbrella skirt (3) of the insulation cover adopts an inner wrapping structure.

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